UCS1001-3-BP-TR_技术文档

UCS1001-3 UCS1001-4

USB Port Power Controller with Charger Emulation

Datasheet

PRODUCT FEATURES

General Description

Features

Port power switch with two current limit behaviors



The UCS1001 provides a USB port power switch for

precise control of up to 2.5 amperes continuous current

with over-current limit (OCL), dynamic thermal

management, latch or auto-recovery (low test current)

fault handling, selectable active low or high enable,

under- and over-voltage lockout, back-drive protection,

and back-voltage protection.

—

2.9 V to 5.5 V source voltage range

Up to 2.5 A current with 55 mΩ On Resistance

Over-current trip or constant current limiting

Soft turn-on circuitry

Selectable current limit

Dynamic thermal management

Under- and over-voltage lockout

Back-drive, back-voltage protection

Latch or auto-recovery (low test current) fault handling

Selectable active high or low power switch enable

BC1.2 VBUS discharge port renegotiation function

Split supply support for VS and VDD is an option for low

power in system standby states. This gives battery

operated applications, like notebook PCs, the ability to

detect attachments from a sleep or off state. After the

Attach Detection is flagged, the system can decide to

wake up and/or provide charging.



Selectable / automatic cycling of USB data line

charger emulation profiles

—

Employs unique method and system for sampling

multiple profiles*

In addition to power switching and current limiting

modes, the UCS1001 will automatically charge a wide

variety of portable devices, including USB-IF BC1.2,

YD/T-1591 (2009), most Apple^®and RIM^®, and many

others. Nine preloaded charger emulation profiles

maximize compatibility coverage of peripheral devices.

—

UCS1001-3 and UCS1001-4 supports 12W charger

emulation

—

Allows for active cables

USB-IF BC1.2 charging downstream port (CDP) &

dedicated charging port (DCP) modes, YD/T-1591, and

most Apple and RIM protocols standard

USB 2.0 compliant high-speed data switch (in Pass-

through and CDP modes)

—

The UCS1001 is available in a 20-pin QFN 4 mm x

4 mm package.

Nine preloaded charger emulation profiles for maximum

compatibility coverage of peripheral devices

Applications



Charging Active (UCS1001-3) or Attach Detection

(UCS1001-4) open-drain output



Notebook and Netbook Computers

Tablets and E-book readers

Desktops and Monitors



Ultra low power Sleep state

Optional split supply support for VBUS and VDD for

low power in system standby states

Docking Stations and Printers

AC-DC wall adapters



Wake on Attach USB (UCS1001-4)

Wide operating temperature range: -40 °C to +85 °C

IEC61000-4-2 8 / 15 kV ESD immunity

UL recognized and EN/IEC 60950-1 (CB) certified

* Unique technology covered under the following US patents pending: 13/109,446; 13/149,529; 13/173,287; 13/233,949; 13/157,282;

12/978,371; 13/232,965.

SMSC UCS1001

Revision 1.4 (07-16-13)

DATASHEET

USB Port Power Controller with Charger Emulation

Datasheet

Block Diagram

DPIN

DPOUT

DMOUT

USB 2.0 HS Data Switch

& Charger Emulator

DMIN

VDD

VS

Attach Detector

VBUS

UVLO,

OVLO

GND

Power

Switch

ILIM

ALERT#

CHRG# (UCS1001-1 only)

A_DET# (UCS1001-2 only)

VDD

PWR_EN

SEL

Interface,

Logic

Temp

Charger Control,

Measurement,

OCL

EM_EN

M1

M2

S0

LATCH

Revision 1.4 (07-16-13)

2

SMSC UCS1001

DATASHEET

USB Port Power Controller with Charger Emulation

Datasheet

ORDERING INFORMATION:

ORDERING NUMBER

PACKAGE

FEATURES

UCS1001-3-BP-TR

20 pin QFN 4mm x 4mm

(RoHS compliant)

USB Port Power Controller with Charger

Emulation, 12W Emulation support, and

charging active output indicator

UCS1001-4-BP-TR

20 pin QFN 4mm x 4mm

(RoHS compliant)

USB Port Power Controller with Charger

Emulation, 12W Emulation support, and

portable device attachment detected

output indicator

REEL SIZE IS 4,000 PIECES

This product meets the halogen maximum concentration values per IEC61249-2-21

For RoHS compliance and environmental information, please visit www.smsc.com/rohs

Please contact your SMSC sales representative for additional documentation related to this product

such as application notes, anomaly sheets, and design guidelines.

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for

construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC

reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications

before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent

rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated

version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors

known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not

designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property

damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of

this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered

trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.

The Microchip name and logo, and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE

OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL

DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT;

TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD

TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

SMSC UCS1001

3

Revision 1.4 (07-16-13)

DATASHEET

USB Port Power Controller with Charger Emulation

Datasheet

Table of Contents

Chapter 1 Terms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Chapter 2 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Chapter 3 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1 ESD & Transient Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.1 Human Body Model (HBM) Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.2 Charged Device Model (CDM) Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1.3 IEC61000-4-2 Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Chapter 4 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.1 UCS1001 Power States. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.1.1 Off State Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.1.2 Sleep State Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.1.3 Detect State Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.1.4 Active State Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.1.5 Error State Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.2 Supply Voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.2.1 VDD Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.2.2 VS Source Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.2.3 Back-voltage Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.2.4 Back-drive Current Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.2.5 Under-voltage Lockout on VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.2.6 Over-voltage Detection and Lockout on VS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.3 Discrete Input Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.3.1 ILIM Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.3.2 SEL Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.3.3 M1, M2, and EM_EN Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.3.4 PWR_EN Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.3.5 Latch Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.3.6 S0 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.4 Discrete Output Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.4.1 ALERT# and A_DET# Output Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.4.2 Interrupt Blanking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Chapter 5 USB High-speed Data Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.1 USB High-speed Data Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.1.1 USB-IF High-speed Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Chapter 6 USB Port Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.1 USB Port Power Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.2 Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.2.1 Current Limit Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.2.2 Short Circuit Output Current Limiting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.2.3 Soft Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.4 Current Limiting Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.3 Thermal Management and Voltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

6.3.1 Thermal Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Revision 1.4 (07-16-13)

4

SMSC UCS1001

DATASHEET

USB Port Power Controller with Charger Emulation

Datasheet

6.4 VBUS Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.5 Fault Handling Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.5.1 Auto-recovery Fault Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.5.2 Latched Fault Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Chapter 7 Detect State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.1 Device Attach / Removal Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.2 VBUS Bypass Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.3 Attach Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.4 Removal Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Chapter 8 Active State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.1 Active State Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.2 Active Mode Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.3 BC1.2 Detection Renegotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.4 Data Pass-through (No Charger Emulation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.5 BC1.2 SDP (No Charger Emulation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.6 BC1.2 CDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.6.1 BC1.2 CDP Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.7 BC1.2 DCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.7.1 BC1.2 DCP Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.8 Dedicated Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.8.1 Emulation Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.8.2 Emulation Cycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

8.8.3 DCE Cycle Retry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

8.9 Current Limit Mode Associations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

8.10 Preloaded Charger Emulation Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

8.10.1 Legacy 1 Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

8.10.2 Legacy 2, 4, 5, and 7 Charger Emulation Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

8.10.3 Legacy 3 Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.10.4 Legacy 6 Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Chapter 9 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Chapter 10 Typical Operating Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Chapter 11 Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

SMSC UCS1001

5

Revision 1.4 (07-16-13)

DATASHEET

USB Port Power Controller with Charger Emulation

Datasheet

List of Figures

Figure 2.1 UCS1001-3 Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 2.2 UCS1001-4 Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 3.1 USB Rise Time / Fall Time Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 3.2 Description of DC Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 4.1 UCS1001-3 System Configuration (No Charger Emulation) . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 4.2 UCS1001-4 System Configuration (No Charger Emulation) . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 4.3 UCS1001-3 System Configuration (No USB Host, with Charger Emulation). . . . . . . . . . . . . 26

Figure 4.4 UCS1001-4 System Configuration (No USB Host, with Charger Emulation). . . . . . . . . . . . . 27

Figure 4.5 Wake Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 6.1 Trip Current Limiting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 6.2 Constant Current Limiting (Variable Slope) Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 9.1 UCS1001 Package View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 9.2 UCS1001 Package Dimensions and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 10.1 USB-IF High-speed Eye Diagram (without data switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 10.2 USB-IF High-speed Eye Diagram (with data switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 10.3 Short Applied After Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 10.4 Power Up Into A Short . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 10.5 Internal Power Switch Short Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 10.6 VBUS Discharge Behavior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 10.7 Data Switch Off Isolation vs. Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 10.8 Data Switch Bandwidth vs. Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 10.9 Data Switch On Resistance vs. Temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 10.10Power Switch On Resistance vs. Temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 10.11R

Resistance vs.Temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

DCP_RES

Figure 10.12Power Switch On / Off Time vs. Temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 10.13VS Over-Voltage Threshold vs. Temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 10.14VS Under Voltage Threshold vs. Temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 10.15Detect State VBUS vs. IBUS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 10.16Trip Current Limit Operation vs. Temp.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 10.17IBUS Measurement Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 10.18Active State Current vs. Temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 10.19Detect State Current vs. Temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 10.20Sleep State Current vs. Temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

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List of Tables

Table 1.1 Terms and Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 2.1 UCS1001 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 2.2 Pin Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 3.1 Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 3.2 Power Dissipation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 3.3 Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 3.4 ESD Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 4.1 Power States Control Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 6.1 UCS1001 ILIM Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 8.1 Active Mode Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 8.2 Current Limit Mode Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Table 11.1 Customer Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

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Datasheet

Chapter 1 Terms and Abbreviations

APPLICATION NOTE: The M1, M2, PWR_EN, and EM_EN pins are referenced in text as the <pin name> control.

Table 1.1 Terms and Abbreviations

TERM /

ABBREVIATION

DESCRIPTION

Active mode

Active power state operation mode: Data Pass-through, BC1.2 SDP, BC1.2 CDP, BC1.2

DCP, or Dedicated Charger Emulation Cycle.

attachment

CC

The physical insertion of a portable device into a USB port that UCS1001 is controlling.

Constant current

CDM

Charged Device Model. JEDEC model for characterizing susceptibility of a device to

damage from ESD.

CDP or USB-IF

BC1.2 CDP

Charging downstream port. The combination of the UCS1001 CDP handshake and an

active standard USB host comprises a CDP. This enables a BC1.2 compliant portable

device to simultaneously draw current up to 1.5 A while data communication is active. The

USB high-speed data switch is closed in this mode.

charge enable

When a charger emulation profile has been accepted by a portable device and charging

commences.

charger emulation

profile

Representation of a charger comprised of DPOUT, DMOUT, and VBUS signalling which

make up a defined set of signatures or handshaking protocols.

connection

USB-IF term which refers to establishing active USB communications between a USB host

and a USB device.

current limiting mode Determines the action that is performed when the IBUS current reaches the ILIM threshold.

Trip opens the port power switch. Constant current (variable slope) allows VBUS to be

dropped by the portable device.

DCE

Dedicated charger emulation. Charger emulation in which the UCS1001 can deliver power

only. No active USB data communication is possible when charging in this mode.

DCP or USB-IF

BC1.2 DCP

Dedicated Charging Port. This functions as a dedicated charger for a BC1.2 portable

device. This allows the portable device to draw currents up to 1.5 A with constant current

limiting (and beyond 1.5 A with trip current limiting). No USB communications are possible.

DC

Dedicated charger. A charger which inherently does not have USB communications, such

as an A/C wall adapter.

disconnection

USB-IF term which refers to the loss of active USB communications between a USB host

and a USB device.

dynamic thermal

management

The UCS1001 automatically adjusts port power switch limits and modes to lower internal

power dissipation when the thermal regulation temperature value is approached.

enumeration

handshake

A USB-specific term that indicates that a host is detecting and identifying USB devices.

Application of a charger emulation profile that requires a response. Two-way

communication between the UCS1001 and the portable device.

HBM

HSW

Human Body Model.

High-speed switch.

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Table 1.1 Terms and Abbreviations (continued)

TERM /

ABBREVIATION

DESCRIPTION

I_{BUS_R2MIN}

ILIM

Current limiter mode boundary.

The IBUS current threshold used in current limiting. In trip mode, when ILIM is reached,

the port power switch is opened. In constant current mode, when the current exceeds ILIM,

operation continues at a reduced voltage and increased current; if VBUS voltage drops

below V_{BUS_MIN}, the port power switch is opened.

Legacy

USB devices that require non-BC1.2 signatures be applied on the DPOUT and DMOUT

pins to enable charging.

OCL

Over-current limit.

portable device

power thief

USB device attached to the USB port.

A USB device that does not follow the handshaking conventions of a BC1.2 device or

Legacy devices and draws current immediately upon receiving power (i.e., a USB book

light, portable fan, etc).

removal

The physical removal of a portable device from a USB port that the UCS1001 is controlling.

SDP or USB-IF SDP Standard downstream port. The combination of the UCS1001 high-speed switch being

closed with an upstream USB host present comprises a BC1.2 SDP. This enables a BC1.2

compliant portable device to simultaneously draw current up to 0.5 A while data

communication is active.

signature

Application of a charger emulation profile without waiting for a response. One-way

communication from the UCS1001 to the portable device.

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Chapter 2 Pin Description

15

14

13

12

11

DMIN

DPIN

M1

1

2

3

4

5

M2

UCS1001-3

20-QFN 4mm x 4mm

ALERT#

S0

VBUS1

VBUS2

ILIM

LATCH

GND FLAG

Figure 2.1 UCS1001-3 Pin Diagram

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USB Port Power Controller with Charger Emulation

Datasheet

15

14

13

12

11

DMIN

DPIN

M1

1

2

3

4

5

M2

UCS1001-4

20-QFN 4mm x 4mm

ALERT#

S0

VBUS1

VBUS2

ILIM

LATCH

GND FLAG

Figure 2.2 UCS1001-4 Pin Diagram

The pin types are described in Table 2.2. All pins are 5 V tolerant.

Table 2.1 UCS1001 Pin Description

NUMBER

IF PIN NOT USED

CONNECTION

PIN NAME

PIN FUNCTION

PIN TYPE

1

2

M1

Active mode selector input #1

DI

Connect to ground

or VDD (see

Note 2.2)

M2

Active mode selector input #2

DI

Connect to ground

or VDD (see

Note 2.2)

3

4

5

VBUS1

VBUS2

ILIM

Voltage output from Power Switch.

These pins must be tied together.

Hi-Power,

AIO

Note 2.1

Leave open

Selects the maximum current limit at

power-up

AIO

n/a

6

7

8

SEL

VS1

VS2

Selects polarity of PWR_EN control

DI

n/a

Voltage input to Power Switch.

These pins must be tied together.

Hi-Power,

AIO

Connect to ground

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Table 2.1 UCS1001 Pin Description (continued)

NUMBER

IF PIN NOT USED

CONNECTION

PIN NAME

PIN FUNCTION

PIN TYPE

9

VDD

Main power supply input for chip

functionality

Power

n/a

10

PWR_EN

Port power switch enable input. Polarity

determined by SEL pin.

DI

Connect to ground

or VDD (see

Note 2.2)

11

12

13

14

LATCH

S0

Latch / Auto-recovery fault handling

mechanism selection input

DI

n/a

Enables Attach / Removal Detection

feature

n/a

ALERT#

DPIN

Active low error event output flag

(requires pull-up resistor)

OD

AIO

Connect to ground

USB data input (plus)

Connect to ground

or ground through

a resistor

15

DMIN

USB data input (minus)

AIO

Connect to ground

or ground through

a resistor

16

17

DMOUT

DPOUT

CHRG#

USB data output (minus)

USB data output (plus)

AIO

OD

Connect to ground

18

Active low “Charging Active” output flag

(requires pull-up resistor)

(UCS1001-1,

UCS1001-3)

18

A_DET#

EM_EN

Active low Attach Detection output flag

(requires pull-up resistor)

OD

DI

Connect to ground

(UCS1001-2,

UCS1001-4)

19

Active mode selector input

Connect to ground

or VDD (see

Note 2.2)

20

GND

Ground

Power

n/a

Bottom Pad

GND FLAG

Thermal connection to ground plane

Thermal Pad

Note 2.1 Total leakage current from pins 3 and 4 (VBUS) to ground must be less than 100 µA for

proper attach / removal detection operation.

Note 2.2 To ensure operation, the PWR_EN pin must be enabled, as determined by the SEL pin

decode, when it is not driven by an external device. Furthermore, one of the M1, M2, or

EM_EN pins must be connected to VDD if all three are not driven from an external device.

If the PWR_EN is disabled or all of the M1, M2, and EM_EN are connected to ground, the

UCS1001 will remain in the Sleep or Detect state indefinitely.

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Table 2.2 Pin Types

DESCRIPTION

PIN TYPE

Power

Hi-Power

AIO

This pin is used to supply power or ground to the device.

This pin is a high current pin.

Analog Input / Output - this pin is used as an I/O for analog signals.

Digital Input - this pin is used as a digital input.

DI

OD

Open-drain Digital Output - used as a digital output. It is open-drain and requires a pull-up

resistor.

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Chapter 3 Electrical Specifications

Table 3.1 Absolute Maximum Ratings

Voltage on VDD, VS, and VBUS pins

Pullup voltage (V_PULLUP

-0.3 to 6

V

)

-0.3 to VDD + 0.3

±50

Data switch current (I_HSW__ON), switch on

mA

Port power switch current

Internally limited

-0.3 to VDD + 0.3

Data switch pin voltage to ground (DPOUT, DPIN, DMOUT,

DMIN); (VDD powered or unpowered)

V

Differential voltage across open data switch (DPOUT - DPIN,

DMOUT - DMIN, DPIN - DPOUT, DMIN - DMOUT)

VDD

Voltage on any other pin to ground

Current on any other pin

-0.3 to VDD + 0.3

±10

V

mA

Package power dissipation

See Table 3.2

-40 to 125

-55 to 150

Operating ambient temperature range

Storage temperature range

°C

Note: Stresses above those listed could cause permanent damage to the UCS1001. This is a stress

rating only and functional operation of the UCS1001 at any other condition above those

indicated in the operation sections of this specification is not implied.

Table 3.2 Power Dissipation Summary

TA <

25 °C

POWER

RATING

TA =

70 °C

POWER

RATING

TA =

85 °C

POWER

RATING

DERATING

FACTOR

ABOVE 25 °C

BOARD

PKG

θ_JC

θ_JA

High K

20-pin QFN

6 °C /

W

41 °C /

W

24.4 mW / °C

2193 mW

1498 mW

1095 mW

748 mW

729 mW

498 mW

(see Note 3.1) 4 mm x 4 mm

Low K 20-pin QFN

(see Note 3.1) 4 mm x 4 mm

6 °C /

W

60 °C /

W

16.67 mW /

°C

Note 3.1 A High K board uses a thermal via design with the thermal landing soldered to the PCB

ground plane with 0.3 mm (12 mil) diameter vias in a 3x3 matrix (9 total) at 0.5 mm (20 mil)

pitch. The board is multi-layer with 1-ounce internal power and ground planes and 2-ounce

copper traces on top and bottom. A Low K board is a two layer board without thermal via

design with 2-ounce copper traces on the top and bottom.

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Table 3.3 Electrical Specifications

VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, V_PULLUP= 3 V to 5.5 V, = -40 °C to

all Typical values at VDD = VS = 5 V, T_A= 27 °C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

Power and Interrupts - DC

Supply Voltage

Source Voltage

VDD

VS

4.5

2.9

5

5.5

750

V

See Note 3.2

V

Supply Current in Active

(I_{DD_ACTIVE}+ I_{VS_ACT}

I_ACTIVE

650

µA

Average current

IBUS = 0 mA

)

Supply Current in Sleep

I_SLEEP

5

15

µA

Average current

V_PULLUP< VDD

(I_{DD_SLEEP}+ I_{VS_SLEEP}

)

Supply Current in Detect

I_DETECT

185

220

Average current

(I_{DD_DETECT}

I_{VS_DETECT}

+

)

No portable device attached.

Power-on Reset

VS Low Threshold

VS Low Hysteresis

VDD Low Threshold

VDD Low Hysteresis

V_{S_UVLO}

V_{S_UVLO_HYST}

V_{DD_TH}

2.5

100

4

V

mV

V

VS voltage increasing

VS voltage decreasing

VDD voltage increasing

VDD voltage decreasing

V_{DD_TH_HYST}

500

mV

I/O Pins - EM_EN, M1, M2, PWR_EN, ALERT#, CHRG# (UCS1001-3), A_DET# (UCS1001-4)- DC Parameters

Output Low Voltage

V_OL

0.4

V

I_{SINK_IO}= 8 mA

ALERT#CHRG#, A_DET#

Input High Voltage

Input Low Voltage

V_IH

V_IL

2.0

V

PWR_EN, EM_EN, M1, M2

0.8

±5

PWR_EN, EM_EN, M1, M2,

EM_EN

Leakage Current

I_LEAK

µA

Powered or unpowered

V_PULLUP<= VDD

T_A< 85 °C

Interrupt Pins - AC Parameters

25

ALERT#, A_DET# Pin

Blanking Time

t_BLANK

ms

ALERT# Pin Interrupt

Masking Time

t_MASK

5

High-speed Data Switch

High-speed Data Switch - DC Parameters

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Datasheet

Table 3.3 Electrical Specifications (continued)

VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, V_PULLUP= 3 V to 5.5 V, = -40 °C to

all Typical values at VDD = VS = 5 V, T_A= 27 °C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

Switch Leakage Current

I_{HSW_OFF}

±0.5

µA

Switch open - DPIN to DPOUT,

DMIN to DMOUT, or all four

pins to ground. VDD < VS.

Charger Resistance

On Resistance

R_CHG

2

MΩ

DPOUT or DMOUT to VBUS or

ground, see Figure 3.2

BC1.2 DCP charger emulation

active

R_{ON_HSW}

2

Ω

Switch closed, VDD = 5 V

test current = 8 mA, test

voltage = 0.4 V, see Figure 3.2

On Resistance

R_{ON_HSW_1}

5

Ω

Switch closed, VDD = 5 V,

test current = 8 mA, test

voltage = 3.0 V, see Figure 3.2

Delta On Resistance

ΔR_{ON_HSW}

±0.3

Switch closed, VDD = 5 V

_TST= 8 mA, V_TST= 0 to 1.5 V,

I

see Figure 3.2

High-speed Data Switch - AC Parameters

DP, DM Capacitance to

Ground

C_{HSW_ON}

4

pF

Switch closed

VDD = 5 V

DP, DM Capacitance to

Ground

C_{HSW_OFF}

2

pF

Switch open

VDD = 5 V

Turn Off Time

Turn On Time

t_{HSW_OFF}

400

µs

Time from state control

(EM_EN, M1, M2) switch on to

switch off, R_TERM= 50 Ω,

C_LOAD= 5 pF

t_{HSW_ON}

400

µs

Time from state control

(EM_EN, M1, M2) switch off to

switch on, R_TERM= 50 Ω,

C_LOAD= 5 pF

Propagation Delay

Propagation Delay Skew

Rise/Fall Time

t_PD

Δt_PD

t_F/R

0.25

25

ns

R_TERM= 50 Ω, C_LOAD= 5 pF

ps

ns

10

DP - DM Crosstalk

Off Isolation

X_TALK

O_IRR

-40

-30

dB

R_TERM= 50 Ω, C_LOAD= 5 pF

f = 240 MHz

-3dB Bandwidth

BW

1100

MHz

R_TERM= 50 Ω, C_LOAD= 1.5 pF

V

_DPOUT= V_DMOUT= 350 mV

DC

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Table 3.3 Electrical Specifications (continued)

VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, V_PULLUP= 3 V to 5.5 V, = -40 °C to

all Typical values at VDD = VS = 5 V, T_A= 27 °C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

Total Jitter

t_J

200

ps

R_TERM= 50 Ω, C_LOAD= 5 pF,

rise time = fall time = 500 ps at

480 Mbps (PRBS = 2¹⁵- 1)

Skew of Opposite

Transitions of the Same

Output

t_SK(P)

20

ps

R_TERM= 50 Ω, C_LOAD= 5 pF

Port Power Switch

Port Power Switch - DC Parameter

6

Over-voltage Lockout

On Resistance

V_{S_OV}

R_{ON_PSW}

I_{LEAK_VS}

V

55

65

5

mΩ

µA

4.75 V < VS < 5.25 V

VS Leakage Current

2.2

Sleep state

into VS pin

Back-voltage Protection

Threshold

V_{BV_TH}

150

0

mV

µA

VBUS > VS

VS > V_{S_UVLO}

Back-drive Current

I_{BD_1}

3

2

VDD < V_{DD_TH},

Any powered power pin to any

unpowered power pin. Current

out of unpowered pin.

I_{BD_2}

0

µA

VDD > V_{DD_TH},

Any powered power pin to any

unpowered power pin, except

for VDD to VBUS in Detect

power state and VS to VBUS in

Active power state. Current out

of unpowered pin.

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Table 3.3 Electrical Specifications (continued)

VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, V_PULLUP= 3 V to 5.5 V, = -40 °C to

all Typical values at VDD = VS = 5 V, T_A= 27 °C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

Selectable Current Limits

I_LIM1

480

500

mA

ILIM Resistor = 47 kΩ

(500 mA setting)

I_LIM2

I_LIM3

I_LIM4

I_LIM5

I_LIM6

I_LIM7

I_LIM8

850

950

900

mA

ILIM Resistor = 56 kΩ

(900 mA setting)

1000

1200

1500

1800

2000

2500

ILIM Resistor = 68 kΩ

(1000 mA setting)

1130

1400

1720

1910

2370

ILIM Resistor = 82 kΩ

(1200 mA setting)

ILIM Resistor = 100 kΩ

(1500 mA setting)

ILIM Resistor = 120 kΩ

(1800 mA setting)

ILIM Resistor = 150 kΩ

(2000 mA setting)

ILIM Resistor = VDD

(2500 mA setting)

Pin Wake Time

t_{PIN_WAKE}

T_REG

3

ms

°C

Thermal Regulation Limit

110

Die Temperature at which

current limit will be reduced

Thermal Regulation

Hysteresis

T_{REG_HYST}

10

°C

Hysteresis for t_REG

functionality. Temperature must

drop by this value before ILIM

value restored to normal

operation

Thermal Shutdown

Threshold

T_TSD

135

35

°C

Die Temperature at which port

power switch will turn off

Thermal Shutdown

Hysteresis

T_{TSD_HYST}

After shutdown due to T_TSD

being reached, die temperature

drop required before port power

switch can be turned on again

Auto-recovery Test

Current

I_TEST

190

750

mA

mV

Portable device attached,

VBUS = 0 V, Die temp < T_TSD

Auto-recovery Test

Voltage

V_TEST

Portable device attached,

VBUS = 0 V before application,

Die temp < T_TSD

Discharge Impedance

R_DISCHARGE

100

Ω

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USB Port Power Controller with Charger Emulation

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Table 3.3 Electrical Specifications (continued)

VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, V_PULLUP= 3 V to 5.5 V, = -40 °C to

all Typical values at VDD = VS = 5 V, T_A= 27 °C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

Port Power Switch - AC Parameters

0.75

Turn On Delay

Turn Off Time

t_{ON_PSW}

ms

PWR_EN active toggle to

switch on time, VBUS

discharge not active

t_{OFF_PSW_INA}

0.75

1

PWR_EN inactive toggle to

switch off time

C_BUS= 120 μF

t_{OFF_PSW_ERR}

Over-current Error, VBUS Min

Error, or Discharge Error to

switch off

C_BUS= 120 μF

Turn Off Time

VBUS Output Rise Time

Soft Turn on Rate

t_{OFF_PSW_ERR}

100

1.1

ns

TSD or Back-drive Error to

switch off

C_BUS= 120 μF

t_{R_BUS}

ms

Measured from 10% to 90% of

VBUS, C_LOAD= 220 μF

ILIM = 1.0 A

ΔI_BUS/ Δ_t

t_{DC_TEMP}

100

200

1.5

mA /

µs

Temperature Update

Time

ms

Short Circuit Response

Time

t_{SHORT_LIM}

µs

Time from detection of short to

current limit applied.

No C_BUSapplied

Short Circuit Detection

Time

t_SHORT

6

7

ms

Time from detection of short to

port power switch disconnect

and ALERT# pin assertion.

Latched Mode Cycle

Time

t_UL

From PWR_EN edge transition

from inactive to active to begin

error recovery

Auto-recovery Mode

Cycle Time

t_CYCLE

25

20

ms

Time delay before error

condition check

Auto-recovery Delay

t_RST

Portable device attached,

VBUS must be > V_TESTafter

this time

Discharge Time

SMSC UCS1001

t_DISCHARGE

200

ms

Amount of time discharge

resistor applied

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Table 3.3 Electrical Specifications (continued)

VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, V_PULLUP= 3 V to 5.5 V, = -40 °C to

all Typical values at VDD = VS = 5 V, T_A= 27 °C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

Port Power Switch Operation With Trip Mode Current Limiting

Region 2 Current Keep-

out

I_{BUS_R2MIN}

0.1

A

Minimum VBUS Allowed

at Output

V_{BUS_MIN}

2.0

V

Port Power Switch Operation With Constant Current Limiting (Variable Slope)

Region 2 Current Keep-

out

I_{BUS_R2MIN}

1.5

A

Minimum VBUS Allowed

at Output

V_{BUS_MIN}

2.0

V

VBUS Bypass - DC

On Resistance

Leakage Current

Current Limit

R_{ON_BYP}

50

Ω

I_{LEAK_BYP}

3

µA

mA

Switch off

I_{DET_CHG /}

I_{BUS_BYP}

2

VDD = 5 V and VBUS> 4.75 V

Attach / Removal Detection - DC

800

Attach Detection

Threshold

I_{DET_QUAL}

µA

Primary Removal

Detection Threshold

I_{REM_QUAL_ACT}

700

800

Active power state

I_{REM_QUAL_DET}

Detect power state

(see Section 7.4)

Attach / Removal Detection - AC

100

Attach Detection Time

t_{DET_QUAL}

ms

Time from Attach to A_DET#

assert (UCS1001-4 only).

Removal Detection Time

Allowed Charge Time

t_{REM_QUAL}

1000

ms

t_{DET_CHARGE}

800

Charger Emulation Profile

General Emulation - DC

156

C_BUS= 500 µF max

Charging Current

Threshold

I_{BUS_CHG}

mA

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Table 3.3 Electrical Specifications (continued)

VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, V_PULLUP= 3 V to 5.5 V, = -40 °C to

all Typical values at VDD = VS = 5 V, T_A= 27 °C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

DP-DM Shunt Resistor

Value

R_{DCP_RES}

200

Ω

Connected between DPOUT

and DMOUT

0 V < DPOUT = DMOUT < 3 V

Voltage Output

SX_RXMAG_

VOLT_BC

0.5

50

V

DMOUT

250 µA load

Pull-down Current

SX_PUPD

_ACC_BC

µA

DPOUT or DMOUT = 0.15 V

Compliance voltage

General Emulation - AC

50

Emulation Reset Time

t_{EM_RESET}

ms

Note 3.2 For split supply systems using the Attach Detection feature, VS must not exceed VDD +

150 mV.

Figure 3.1 USB Rise Time / Fall Time Measurement

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V_BUS

R_CHG

DPOUT

DPIN

R_CHG

I_TST

V_TST

V_BUS

R_CHG

DMOUT

DMIN

R_CHG

I_TST

V_TST

Figure 3.2 Description of DC Terms

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3.1

ESD & Transient Performance

APPLICATION NOTE: Depending on the level of ESD protection required by the application, external protection

devices may be required. The datasheet ESD levels were reached using external devices

and standard USB-A connectors; refer to the EVB schematic and reference design for

details.

Table 3.4 ESD Ratings

ESD SPEC

RATING OR VALUE

EN / IEC61000-4-2 (DPOUT, DMOUT pins) air gap,

Operational Classification B (see Note 3.3)

Level4(15kV)

EN / IEC61000-4-2 (DPOUT, DMOUT pins) direct contact,

Operational Classification B (see Note 3.3)

Level4(8 kV)

Level4(15 kV)

Level4(8 kV)

EN / IEC61000-4-2 (VBUS, GND pins) air gap,

Operational Classification A (see Note 3.4)

EN / IEC61000-4-2 (VBUS, GND pins) direct contact,

Operational Classification A (see Note 3.4)

Note 3.3 Operational Classification B indicates that during and immediately after an ESD event,

anomalous behavior may occur; however, it is non-damaging and the device is self-

recovering. All IEC testing is performed using an SMSC evaluation board.

Note 3.4 Operational Classification A indicates that during and immediately after an ESD event no

anomalous behavior will occur. All IEC testing is performed using an SMSC evaluation

board.

3.1.1

3.1.2

3.1.3

Human Body Model (HBM) Performance

HBM testing verifies the ability to withstand ESD strikes like those that occur during handling and

manufacturing and is done without power applied to the IC. To pass the test, the device must have no

change in operation or performance due to the event.

Charged Device Model (CDM) Performance

CDM testing verifies the ability to withstand ESD strikes like those that occur during handling and

assembly with pick and place style machinery and is done without power applied to the IC. To pass

the test, the device must have no change in operation or performance due to the event.

IEC61000-4-2 Performance

The IEC61000-4-2 ESD specification is an international standard that addresses system-level immunity

to ESD strikes while the end equipment is operational. These tests are performed while the device is

powered.

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Chapter 4 General Description

The UCS1001 provides a single USB port power switch for precise control of up to 2.5 amperes

continuous current with over-current limit (OCL), dynamic thermal management, latch or auto-recovery

fault handling, selectable active low or high enable, under- and over-voltage lockout, and back-voltage

protection.

Split supply support for VBUS and VDD is an option for low power in system standby states.

In addition to power switching and current limiting, the UCS1001 provides charger emulation profiles

to charge a wide variety of portable devices, including USB-IF BC1.2 (CDP or DCP modes), YD/T-

1591 (2009), most Apple and RIM portable devices, and many others.

Figure 4.1 shows a system configuration in which the UCS1001-3 provides a port power switch, low

power Attach Detection, and charging active signaling. Figure 4.2 shows a system configuration in

which the UCS1001-4 provides a port power switch, low power Attach Detection, and portable device

Attach Detection signaling. These configurations are useful for applications that already provide USB

BC1.2 and/or legacy data line handshaking on the USB data lines, but still require port power

switching.

.

DPIN

DMIN

VS1

DPOUT

DMOUT

VBUS1

VBUS2

USB Host

(DP, DM)

5 V Host

Device

VS2

CIN

CBUS

EM_EN

UCS1001-1

^M1UCS1001-3

3 V – 5.5 V

M2

Enable

Latch

Detect State

Upon Fault

PWR_EN

SEL

3 V – 5.5 V

LATCH

S0

VDD

ILIM

5 V

Auto-recovery

Upon Fault

Disable Detect

State

VDD

GND

CHRG#

ALERT#

Figure 4.1 UCS1001-3 System Configuration (No Charger Emulation)

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DPIN

DMIN

VS1

DPOUT

DMOUT

VBUS1

VBUS2

USB Host

(DP, DM)

5 V Host

Device

VS2

CIN

CBUS

EM_EN

UCS1001-2

3 V – 5.5 V

^M1UCS1001-4

M2

Enable Detect

Statet

Latch

Upon Fault

PWR_EN

SEL

3 V – 5.5 V

LATCH

S0

VDD

ILIM

5 V

Auto-recovery

Upon Fault

Disable Detect

State

VDD

GND

A_DET#

ALERT#

Figure 4.2 UCS1001-4 System Configuration (No Charger Emulation)

Figure 4.3 shows a system configuration in which the UCS1001-3 provides a port power switch, low

power Attach Detection, charger emulation (with no USB host), and charging active signaling.

Figure 4.4 shows a system configuration in which the UCS1001-4 provides a port power switch, low

power Attach Detection, charger emulation (with no USB host), and portable device Attach Detection

signaling. These configurations are useful for wall adapter type applications.

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15 K

DPIN

DMIN

VS1

DPOUT

DMOUT

VBUS1

5 V

Device

VS2

VBUS2

CIN

CBUS

EM_EN

UCS1001-1

3 V – 5.5 V

^M1UCS1001-3

M2

Enable Detect

State

Latch

Upon Fault

PWR_EN

SEL

3 V – 5.5 V

LATCH

S0

VDD

ILIM

5 V

Disable

Detect State

Auto-recovery

Upon Fault

VDD

GND

CHRG#

ALERT#

Figure 4.3 UCS1001-3 System Configuration (No USB Host, with Charger Emulation)

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.

15 K

DPIN

DMIN

VS1

DPOUT

DMOUT

VBUS1

5 V

Device

VS2

VBUS2

CIN

CBUS

EM_EN

UCS1001-2

3 V – 5.5 V

^M1UCS1001-4

M2

Enable Detect

State

Latch

Upon Fault

PWR_EN

SEL

3 V – 5.5 V

LATCH

S0

VDD

ILIM

5 V

Auto-recovery

Upon Fault

Disable

Detect State

VDD

GND

A_DET#

ALERT#

Figure 4.4 UCS1001-4 System Configuration (No USB Host, with Charger Emulation)

UCS1001-3 and UCS1001-4 references designs are available; contact your SMSC representative.

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4.1

UCS1001 Power States

The UCS1001 has the following power states.



Off - This power state is entered when the voltage at the VDD pin voltage is < V_{DD_TH}. In this state

the device is considered “off”. The UCS1001 will not retain its digital states. The port power switch,

bypass switch, and the high-speed data switches will be off. See Section 4.1.1, "Off State

Operation".



Sleep - This is the lowest power state available. While in this state, the UCS1001 will respond to

changes in emulation controls. The high-speed switch and all other functionality will be disabled.

See Section 4.1.2, "Sleep State Operation".

Detect - This is a lower current power state. In this state, the device is actively looking for a

portable device to be attached. The high-speed switch is disabled. See Section 4.1.3, "Detect State

Operation".



Error - This power state is entered when a fault condition exists. See Section 4.1.5, "Error State

Operation".

Active - This power state provides full functionality. While in this state, operations include activation

of the port power switch, USB data line handshaking / charger emulation, current limiting. See

Section 4.1.4, "Active State Operation".

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Table 4.1 shows the settings for the various power states, except Off and Error. If VDD < V_{DD_TH}, the

UCS1001 is in the Off state. To determine the mode of operation in the Active state, see Table 9.1,

"Active Mode Selection". For more information about configuring the UCS1001 to create single or dual

mode charger solutions, see SMSC application note24.20“Using the as a Single or Dual Mode

Charger.”

APPLICATION NOTE: Using configurations not listed in Table 4.1 is not recommended and may produce

undesirable results.

Table 4.1 Power States Control Settings

PORTABLE

DEVICE

ATTACHED

POWER

STATE

M1, M2,

EM_EN

VS

PWR_EN S0

BEHAVIOR

Sleep

X

disabled

0

Not set to

Data

X

All switches disabled. VBUS will be

near ground potential.

Pass-

through.

See

Note 4.1.

X

enabled

disabled

enabled

0

1

All = 0b

X

Detect

(see Chapter 7,

High-speed switch disabled. Port

power switch disabled. Host-

controlled transition to Active state

(see Section 4.1.3.2, "Host-

Controlled Transition from Detect to

Active").

< V_{S_UVLO}

All <> 0b

Detect State)

> V_{S_UVLO}

enabled

1

0

1

All <> 0b

No

X

High-speed switch disabled.

Automatic transition to Active state

when conditions met (see Section

4.1.3.1, "Automatic Transition from

Detect to Active").

Active

(see Chapter 9,

High-speed switch enabled /

disabled based on mode. Port power

switch is on at all times. Attach and

Removal Detection disabled. See

Note 4.2.

Active State)

Yes

Port power switch is on. Removal

Detection enabled.

Note 4.1 In order to transition from Active state Data Pass-through mode into Sleep with these

settings, change the M1, M2, and EM_EN pins before changing the PWR_EN pin. See

Section 9.4, "Data Pass-through (No Charger Emulation)".

Note 4.2 If S0=’0’ and a portable device is not attached in DCE Cycle mode, the UCS1001 will be

cycling through charger emulation profiles. There is no guarantee which charger emulation

profile will be applied first when a portable device attaches.

4.1.1

Off State Operation

The device will be in the off state if VDD is less than V_{DD_TH}. When the UCS1001 is in the Off state,

it will do nothing, and all circuitry will be disabled.

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4.1.2

Sleep State Operation

When the UCS1001 is in the Sleep state, the device will be in its lowest power state. The high-speed

switch, bypass switch, and the port power switch will be disabled. The Attach and Removal Detection

feature will be disabled. VBUS will be near ground potential. The ALERT# pin will not be asserted. If

asserted prior to entering the Sleep state, the ALERT# pin will be released. The A_DET# pin will be

released.

Figure 4.5 shows timing diagrams for waking the UCS1001.

Wake with M1 or M2 to Active State Data Pass-through Mode

(PWR_EN enabled, S0 = ‘0’, EM_EN = ‘0’, VS > V_{S_UVLO}

)

M1 or M2

t_{PIN_WAKE}

Port power switch closed

(Active state)

Wake with S0

(VS > V_{S_UVLO}, M1 & M2 & EM_EN not all ‘0’ and not set to Data Pass-through)

S0

t_{PIN_WAKE}

Bypass switch closed

(Detect state)

Figure 4.5 Wake Timing

4.1.3

Detect State Operation

When the UCS1001 is in the Detect state, the port power switch will be disabled. The high-speed

switch is also disabled. The VBUS output will be connected to the VDD voltage by a secondary bypass

switch (see Chapter 7, Detect State).

There is one non-recommended configuration which places the UCS1001 in the Detect state, but

V_BUSwill not be discharged and a portable device attachment will not be detected. For the

recommended configurations, see Table 4.1, "Power States Control Settings".



NOT RECOMMENDED: PWR_EN is enabled, S0 = ‘1’, and M1, M2, and EM_EN are all ‘0’.

There are two methods for transitioning from the Detect state to the Active state: automatic and host-

controlled.

4.1.3.1

Automatic Transition from Detect to Active

For the Detect state, set S0 to ‘1’, enable PWR_EN, set the EM_EN, M1, and M2 controls to the

desired Active mode (Table 9.1, "Active Mode Selection"), and supply VS > V_{S_UVLO}. When a portable

device is attached and an Attach Detection event occurs, the UCS1001 will automatically transition to

the Active state and operate according to the selected Active mode.

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4.1.3.2

Host-Controlled Transition from Detect to Active

For the Detect state, set S0 to ‘1’, set the EM_EN, M1, and M2 controls to the desired Active mode

(Table 9.1, "Active Mode Selection"), and configure one of the following: 1) disable PWR_EN and

supply VS, or 2) enable PWR_EN and don’t supply VS. When a portable device is attached and an

Attach Detection event occurs, the host must respond to transition to the Active state. Depending on

the control settings in the Detect state, this could entail 1) enabling PWR_EN or 2) supplying VS above

the threshold.

APPLICATION NOTE: If S0 is '1', PWR_EN is enabled, and VS is not present, the A_DET# pin will cycle if the

current draw exceeds the current capacity of the bypass switch.

4.1.3.3

State Change from Detect to Active

When conditions cause the UCS1001 to transition from the Detect state to the Active state, the

following occurs:

1. The Attach Detection feature will be disabled; the Removal Detection feature remains enabled,

unless S0 is changed to ‘0’.

2. The bypass switch will be turned off.

3. The discharge switch will be turned on.

4. The port power switch will be turned on.

4.1.4

Active State Operation

Every time that the UCS1001 enters the Active state and the port power switch is closed, it will enter

the mode as instructed by the host controller (see Chapter 9, Active State). The UCS1001 cannot be

in the Active state (and therefore, the port power switch cannot be turned on) if any of the following

conditions exist:

1. VS < V_{S_UVLO}

.

2. PWR_EN is disabled.

3. M1, M2, and EM_EN are all set to '0'.

4. S0 is set to ‘1’ and an Attach Detection event has not occurred.

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4.1.5

Error State Operation

The UCS1001 will enter the Error state from the Active state when any of the following events are

detected:

1. The maximum allowable internal die temperature (T_TSD) has been exceeded (see Section 6.3.1.2).

2. An over-current condition has been detected (see Section 6.2.1).

3. An under-voltage condition on VBUS has been detected (see Section 4.2.5).

4. A back-drive condition has been detected (see Section 4.2.3).

5. A discharge error has been detected (see Section 6.4).

6. An over-voltage condition on the VS pins.

The UCS1001 will enter the Error state from the Detect state when a back-drive condition has been

detected or when the maximum allowable internal die temperature has been exceeded.

The UCS1001 will enter the Error state from the Sleep state when a back-drive condition has been

detected.

When the UCS1001 enters the Error state, the port power switch, the VBUS bypass switch, the high-

speed switch are turned off, and the ALERT# pin is asserted. They will remain off while in this power

state. The UCS1001 will leave this state as determined by the fault handling selection (see Section

6.5, "Fault Handling Mechanism").

When using the Latch fault handler and the user has re-activated the device by or toggling the

PWR_EN control, the UCS1001 will check that all of the error conditions have been removed. If using

Auto-recovery fault handler, after the t_CYCLEtime period, the UCS1001 will check that all of the error

conditions have been removed.

If all of the error conditions have been removed, the UCS1001 will return to the Active state or Detect

state, as applicable. Returning to the Active state will cause the UCS1001 to restart the selected mode

(see Section 9.2, "Active Mode Selection").

If the device is in the Error state and a Removal Detection event occurs, it will check the error

conditions and then return to the power state defined by the PWR_EN, M1, M2, EM_EN, and S0

controls.

4.2

Supply Voltages

4.2.1

VDD Supply Voltage

The UCS1001 requires 4.5 V to 5.5 V present on the VDD pin for core device functionality.

4.2.2

VS Source Voltage

VS can be a separate supply and can be greater than VDD to accommodate high current applications

in which current path resistances result in unacceptable voltage drops that may prevent optimal

charging of some portable devices.

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4.2.3

Back-voltage Detection

Whenever the following conditions are true, the port power switch will be disabled, the VBUS bypass

switch will be disabled, the high-speed data switch will be disabled, and a Back-voltage event will be

flagged. This will cause the UCS1001 to enter the Error power state (see Section 4.1.5, "Error State

Operation").

1. The VBUS voltage exceeds the VS voltage by V_{BV_TH}and the port power switch is closed. The

port power switch will be opened immediately. If the condition lasts for longer than t_MASK, then the

UCS1001 will enter the Error state. Otherwise, the port power switch will be turned on as soon as

the condition is removed.

2. The VBUS voltage exceeds the VDD voltage by V_{BV_TH}and the VBUS bypass switch is closed.

The bypass switch will be opened immediately. If the condition lasts for longer than t_MASK, then the

UCS1001 will enter the Error state. Otherwise, the bypass switch will be turned on as soon as the

condition is removed.

4.2.4

Back-drive Current Protection

If a portable device is attached that is self-powered, it may drive the VBUS port to its power supply

voltage level; however, the UCS1001 is designed such that leakage current from the VBUS pins to the

VDD or VS pins shall not exceed I_{BD_1}(if the VDD voltage is zero) or I_{BD_2}(if the VDD voltage exceeds

V_{DD_TH}).

4.2.5

4.2.6

Under-voltage Lockout on VS

The UCS1001 requires a minimum voltage (V_{S_UVLO}) be present on the VS pin for Active power state.

Over-voltage Detection and Lockout on VS

The UCS1001 port power switch will be disabled if the voltage on the VS pin exceeds a voltage

(V_{S_OV}) for longer than the specified time (t_MASK). This will cause the device to enter the Error state.

4.3

Discrete Input Pins

APPLICATION NOTE: If it is necessary to connect any of the control pins except the ILIM or SEL pins via a resistor

to VDD or GND, the resistor value should not exceed 100 kΩ in order to meet the VIH and

VIL specifications.

4.3.1

4.3.2

ILIM Input

The ILIM input determines the initial ILIM setting, as shown in Table 6.1, "UCS1001 ILIM Selection".

SEL Input

The SEL pin selects the polarity of the PWR_EN control. If the SEL pin is high, the PWR_EN control

is active high enable. If the SEL pin is low, the PWR_EN control is active low enable. This pin state

is latched upon device power-up and further changes will have no effect on the PWR_EN control

polarity.

APPLICATION NOTE: If it is necessary to connect the SEL pin to ground via a resistor, a value less than 33kΩ

must be used. If it is necessary to connect the SEL pin to VDD via a resistor, the pull-up

resistor may be any value up to 100 kΩ.

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4.3.3

4.3.4

M1, M2, and EM_EN Inputs

The M1, M2, and EM_EN input controls determine the Active mode and affect the power state (see

Table 4.1, "Power States Control Settings" and Table 9.1, "Active Mode Selection"). When these

controls are all set to ‘0’ and PWR_EN is enabled, the UCS1001 Attach and Removal Detection feature

is disabled.

PWR_EN Input

The PWR_EN control enables the port power switch to be turned on if conditions are met and affects

the power state (see Table 4.1, "Power States Control Settings"). The port power switch cannot be

closed if PWR_EN is disabled. However, if PWR_EN is enabled, the port power switch is not

necessarily closed (see Section 4.1.4, "Active State Operation"). Polarity is controlled by the SEL pin.

4.3.5

4.3.6

Latch Input

The Latch input control determines the behavior of the fault handling mechanism (see Section 6.5,

"Fault Handling Mechanism").

S0 Input

The S0 control enables the Attach and Removal Detection feature and affects the power state (see

Table 4.1, "Power States Control Settings"). When S0 is set to ‘1’, an Attach Detection event must

occur before the port power switch can be turned on. When S0 is set to ‘0’, the Attach and Removal

Detection feature is not enabled.

4.4

Discrete Output Pins

4.4.1

ALERT# and A_DET# Output Pins

The ALERT# pin is an active low open-drain interrupt to the host controller. The ALERT# pin is

asserted when an error occurs (see Section 4.1.5, "Error State Operation"). The ALERT# pin is

released when all conditions have been removed.

The CHRG# pin (UCS1001-3) provides an active low open-drain output indication that charging of an

attached device is active. It will remain asserted until this condition no longer exists and then will be

automatically released.

The A_DET# pin (UCS1001-4) provides an active low open-drain output indication that a valid Attach

Detection event has occurred. It will remain asserted until the UCS1001 is placed into the Sleep state

or a Removal Detection event occurs. For wake on USB, the A_DET# pin assertion can be utilized by

the system. If the S0 control is ‘0’ and the UCS1001 is in the Active state, the A_DET# pin will be

asserted regardless if a portable device is attached or not. If S0 is '1', PWR_EN is enabled, and VS

is not present, the A_DET# pin will cycle if the current draw exceeds the current capacity of the bypass

switch.

4.4.2

Interrupt Blanking

The ALERT#,CHRG#(UCS1001-3), and A_DET# (UCS1001-4)pins will not be asserted for a specified

time (up to t_BLANK) after power-up. Additionally, an error condition (except for the thermal shutdown)

must be present for longer than a specified time (t_MASK) before the ALERT# pin is asserted.

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Chapter 5 USB High-speed Data Switch

5.1

USB High-speed Data Switch

The UCS1001 contains a series USB 2.0 compliant high-speed switch between the DPIN and DMIN

pins and between the DPOUT and DMOUT pins. This switch is designed for high-speed, low latency

functionality to allow USB 2.0 full-speed and high-speed communications with minimal interference.

Nominally, the switch is closed in the Active state, allowing uninterrupted USB communications

between the upstream host and the portable device. The switch is opened when:

1. The UCS1001 is actively emulating using any of the charger emulation profiles except CDP.

2. The UCS1001 is operating as a dedicated charger.

3. The UCS1001 is in the Detect state or in the Sleep state.

APPLICATION NOTE: If the VDD voltage is less than V_{DD_TH}, the high-speed data switch will be disabled and

opened.

5.1.1

USB-IF High-speed Compliance

The USB data switch will not significantly degrade the signal integrity through the device DP / DM pins

with USB high-speed communications.

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Chapter 6 USB Port Power Switch

6.1

USB Port Power Switch

To assure compliance to various charging specifications, the UCS1001 contains a USB port power

switch that supports two current limiting modes: trip and constant current (variable slope). The current

limit (ILIM) is pin selectable. The switch also includes soft start circuitry and a separate short circuit

current limit.

The port power switch is on in the Active state (except when VBUS is discharging).

6.2

Current Limiting

6.2.1

Current Limit Setting

The UCS1001 hardware set current limit, ILIM, can be one of eight values (see Table 6.1). This resistor

value is read once upon UCS1001 power-up.

APPLICATION NOTE: If it is necessary to connect the ILIM pin to VDD via a pull-up resistor, it is recommended

that this resistor value not exceed 100 kΩ.

APPLICATION NOTE: ILIM pin pull-down resistors with values less than 33 kΩ will cause unexpected behavior.

Table 6.1 UCS1001 ILIM Selection

ILIM RESISTOR (±5%)

ILIM SETTING

47 kΩ pull-down

56 kΩ pull-down

68 kΩ pull-down

82 kΩ pull-down

100 kΩ pull-down

120 kΩ pull-down

150 kΩ pull-down

500 mA

900 mA

1000 mA

1200 mA

1500 mA

1800 mA

2000 mA

2500 mA

VDD

(If a pull-up resistor is used, its value

must not exceed 100 kΩ.)

6.2.2

Short Circuit Output Current Limiting

Short circuit current limiting occurs when the output current is above the selectable current limit (I_LIMx).

This event will be detected and the current will immediately be limited (within t_{SHORT_LIM}time). If the

condition remains, the port power switch will flag an Error condition and enter the Error state (see

Section 4.1.5, "Error State Operation").

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6.2.3

Soft Start

When the PWR_EN control changes states to enable the port power switch, or an Attach Detection

event occurs in the Detect power state and the PWR_EN control is already enabled, the UCS1001

invokes a soft start routine for the duration of the VBUS rise time (t_{R_BUS}). This soft start routine will

limit current flow from VS into VBUS while it is active. This circuitry will prevent current spikes due to

a step in the portable device current draw.

In the case when a portable device is attached while the PWR_EN pin is already enabled, if the bus

current exceeds ILIM, the UCS1001 current limiter will respond within a specified time (t_{SHORT_LIM}

)

and will operate normally at this point. The C_BUScapacitor will deliver the extra current, if any, as

required by the load change.

6.2.4

Current Limiting Modes

The UCS1001 current limiting has two modes: trip and constant current (variable slope). Either mode

functions at all times when the port power switch is closed. The current limiting mode used depends

on the Active state mode (see Section 9.9, "Current Limit Mode Associations"). When operating in the

Detect power state (see Section 4.1.3), the current capacity at VBUS is limited to I_{BUS_BYP}as

described in Section 7.2, "VBUS Bypass Switch".

6.2.4.1

Trip Mode

When using trip current limiting, the UCS1001 USB port power switch functions as a low resistance

switch and rapidly turns off if the current limit is exceeded. While operating using trip current limiting,

the VBUS output voltage will be held relatively constant (equal to the VS voltage minus the R_ON* IBUS

current) for all current values up to the ILIM.

If the current drawn by a portable device exceeds ILIM, the following occurs:

1. The port power switch will be turned off (trip action).

2. The UCS1001 will enter the Error state and assert the ALERT# pin.

3. The fault handling circuitry will then determine subsequent actions.

Trip current limiting is used when the UCS1001 is in Data Pass-through and Dedicated Charger

Emulation Cycle (except when the BC1.2 DCP charger emulation profile is accepted), and when

there’s no handshake.

APPLICATION NOTE: To avoid cycling in trip mode, set ILIM higher than the highest expected portable device

current draw.

Figure 6.1 shows operation of current limits in trip mode with the shaded area representing the USB

2.0 specified VBUS range. Dashed lines indicate the port power switch output will go to zero (e.g., trip)

when ILIM is exceeded. Note that operation at all possible values of ILIM are shown in Figure 6.1 for

illustrative purposes only; in actual operation only one ILIM can be active at any time.

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ILIM (Amps)

1.2

0.5

0.9 1.0

1.5

1.8

2.0

2.5

Operating

Current

5.25

5

4.75

= ILIM’s

Trip action

(ILIM = 0.5 A)

4

Trip action

(ILIM = 2.5 A)

3

2

1

0

Power Switch Voltage and Current Output

go to Zero when ILIM is Exceeded

0.9 1.0

1.2

1.5

1.8

2.0

2.5

0

0.5

IBUS (Amps)

Figure 6.1 Trip Current Limiting Operation

Constant Current Limiting (Variable Slope)

6.2.4.2

Constant current limiting is used when a portable device handshakes using the BC1.2 DCP charger

emulation profile and the current drawn is greater than ILIM (and ILIM < 1.5 A). It’s also used in BC1.2

CDP mode and during the DCE Cycle when a charger emulation profile is being applied.

In CC mode, the port power switch allows the attached portable device to reduce VBUS output voltage

to less than the input VS voltage while maintaining current delivery. The V/I slope depends on the user

set ILIM value. This slope is held constant for a given ILIM value.

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Figure 6.2 shows operation of current limits while using CC mode. Unlike trip mode, once IBUS current

exceeds ILIM, operation continues at a reduced voltage and increased current. Note that the shaded

area representing the USB 2.0 specified VBUS range is now restricted to an upper current limit of

I_{BUS_R2MIN}. Note that the UCS1001 will heat up along each load line as voltage decreases. If the

internal temperature exceeds the T_REGor T_TSDthresholds, the port power switch will open. Also note

that when the VBUS voltage is brought low enough, the port power switch will open.

ILIM (Amps)

0.5

0.9 1.0 1.2

1.5 1.8

2.0

2.5

5.25

5

IBUS_R2MIN

4.75

= ILIM’s

Constant resistance

I_BUSoperation line 5

(ILIM = 1.5 A*)

4

3

2

1

0

Constant

resistance I_BUS

operation line 1

(ILIM = 0.5 A)

CC Mode - Power switch current increases as

voltage decreases when ILIM is exceeded

following constant resistance lines

*1.5 A limit reduced by -3.5% internally

0.9 1.0 1.2

1.5 1.8

2.0

2.5

0.5

0

IBUS (Amps)

Figure 6.2 Constant Current Limiting (Variable Slope) Operation

Thermal Management and Voltage Protection

Thermal Management

6.3

6.3.1

The UCS1001 utilizes two-stage internal thermal management. The first is named dynamic thermal

management and the second is a fixed thermal shutdown.

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6.3.1.1

Dynamic Thermal Management

For the first stage (active in both current limiting modes), referred to as dynamic thermal management,

the UCS1001 automatically adjusts port power switch limits and modes to lower power dissipation

when the thermal regulation temperature value is approached, as described below.

If the internal temperature exceeds the T_REGvalue, the port power switch is opened, the current limit

(ILIM) will be lowered by one step and a timer is started (t_{DC_TEMP}). When this timer expires, the port

power switch is closed and the internal temperature will be checked again. If it remains above the T_REG

threshold, the UCS1001 will repeat this cycle (open port power switch and reduce the ILIM setting by

one step) until ILIM reaches its minimum value.

APPLICATION NOTE: If the temperature exceeds the TREG threshold while operating in the DCE Cycle mode after

a charger emulation profile has been accepted, the profile will be removed. The UCS1001

will not restart the DCE Cycle until one of the control inputs changes states to restart

emulation.

APPLICATION NOTE: The UCS1001 will not actively discharge VBUS as a result of the temperature exceeding

TREG; however, any load current provided by a portable device or other load will cause

VBUS to be discharged when the port power switch is opened, possibly resulting in an

attached portable device resetting.

If the UCS1001 is operating using constant current limiting (variable slope) and the ILIM setting has

been reduced to its minimum set point and the temperature is still above T_REG, the UCS1001 will

switch to operating using trip current limiting. This will be done by reducing the I_{BUS_R2MIN}setting to

100 mA and restoring the ILIM setting to the value immediately below the programmed setting (e.g., if

the programmed ILIM is 1.8 A, the value will be set to 1.5 A). If the temperature continues to remain

above T_REG, the UCS1001 will continue this cycle (open the port power switch and reduce the ILIM

setting by one step).

If the UCS1001 internal temperature drops below T_REG- T_{REG_HYST}, the UCS1001 will take action

based on the following:

1. If the current limit mode changed from CC mode to trip mode, then a timer is started. When this

timer expires, the UCS1001 will reset the port power switch operation to its original configuration

allowing it to operate using constant current limiting (variable slope).

2. If the current limit mode did not change from CC mode to trip mode, or was already operating in

trip mode, the UCS1001 will reset the port power switch operation to its original configuration.

If the UCS1001 is operating using trip current limiting and the ILIM setting has been reduced to its

minimum set point and the temperature is above T_REG, the port power switch will be closed and the

current limit will be held at its minimum setting until the temperature drops below T_REG- T_{REG_HYST}

.

6.3.1.2

Thermal Shutdown

The second stage thermal management consists of a hardware implemented thermal shutdown

corresponding to the maximum allowable internal die temperature (T_TSD). If the internal temperature

exceeds this value, the port power switch will immediately be turned off until the temperature is below

T_TSD- T_{TSD_HYST}

.

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6.4

VBUS Discharge

The UCS1001 will discharge V_BUSthrough an internal 100 Ω resistor when at least one of the following

conditions occurs:



The PWR_EN control is disabled (triggered on the inactive edge of the PWR_EN control).

A portable device Removal Detection event is flagged.

The VS voltage drops below a specified threshold (V_{S_UVLO}) that causes the port power switch to

be disabled.



When commanded into the Sleep power state via the EM_EN, M1, and M2 controls.

Before each charger emulation profile is applied.

Upon recovery from the Error state.

Any time that the port power switch is activated after the VBUS bypass switch has been on (i.e.,

whenever VBUS voltage transitions from being driven from VDD to being driven from VS, such as

going from Detect to Active power state).



Any time that the VBUS bypass switch is activated after the port power switch has been on (i.e.,

going from Active to Detect power state).

When the VBUS discharge circuitry is activated, the UCS1001 will confirm that VBUS was discharged.

If the VBUS voltage is not below the V_TESTlevel, a discharge error will be flagged and the UCS1001

will enter the Error state.

6.5

Fault Handling Mechanism

The UCS1001 has two modes for handling faults: Latch (latch-upon-fault) or Auto-recovery

(automatically attempt to restore the Active power state after a fault occurs). The fault handling

mechanism used depends on the state of the LATCH pin. Faults include over-current, over-voltage (on

VS), under-voltage (on VBUS), back-voltage (VBUS to VS or VBUS to VDD), discharge error, and

maximum allowable internal die temperature (T_TSD) exceeded (see Section 4.1.5, "Error State

Operation").

6.5.1

6.5.2

Auto-recovery Fault Handling

When the LATCH pin is low, auto-recovery fault handling is used. When an error condition is detected,

the UCS1001 will immediately enter the Error state and assert the ALERT# pin (see Section 4.1.5).

Independently from the host controller, the UCS1001 will wait a preset time (t_CYCLE), check error

conditions (t_TST), and restore Active operation if the error condition(s) no longer exist. The ALERT#

pin will be released.

Latched Fault Handling

When the LATCH pin is high, latch fault handling is used. When an error condition is detected, the

UCS1001 will enter the Error power state and assert the ALERT# pin. Upon command from the host

controller (by toggling the PWR_EN from enabled to disabled), the UCS1001 will check error

conditions once and restore Active operation if error conditions no longer exist. If an error condition

still exists, the host controller is required to issue the command again to check error conditions.

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Chapter 7 Detect State

7.1

Device Attach / Removal Detection

The UCS1001 can detect the attachment and removal of a portable device on the USB port. Attach

and Removal Detection does not perform any charger emulation or qualification of the device. The

high-speed switch is “off” during the Detect power state.

7.2

VBUS Bypass Switch

In the Detect state, VDD is the voltage source; in the Active state, VS is the voltage source. The

bypass switch and the port power switch are never both on at the same time.

While the VBUS bypass switch is active, the current available to a portable device will be limited, and

the Attach Detection feature is active.

7.3

7.4

Attach Detection

The Attach Detection feature is only active in the Detect power state. When active, this feature

constantly monitors for portable device attachment. When an Attach Detection event occurs, the

UCS1001-4 will assert the A_DET# pin low. The UCS1001-3 internally flags the event.

Once an Attach Detection event occurs, the UCS1001 will wait for the PWR_EN control to be enabled

(if not already). When PWR_EN is enabled and VS is above the threshold, the UCS1001 will activate

the USB port power switch and operate in the selected Active mode (see Chapter 9, Active State).

Removal Detection

When a Removal Detection event is flagged, the following will be done:

1. Disable the port power switch and the bypass switch.

2. De-assert the A_DET# pin(UCS1001-4 only).

3. Enable an internal discharging device that will discharge the VBUS line.

4. Once the VBUS pin has been discharged, the device will return to the Detect state regardless of

the PWR_EN control state.

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Chapter 8 Active State

8.1

Active State Overview

The UCS1001 has the following modes of operation in the Active state: Data Pass-through, BC1.2

DCP, BC1.2 SDP, BC1.2 CDP, and Dedicated Charger Emulation Cycle. The current limiting mode

depends on the Active mode behavior (see Table 8.2, "Current Limit Mode Options").

8.2

Active Mode Selection

The Active mode selection is controlled by three controls: EM_EN, M1, and M2, as shown in Table 8.1.

Table 8.1 Active Mode Selection

#

M1

M2

EM_EN

ACTIVE MODE

1

2

3

4

5

6

7

0

1

0

1

0

1

0

1

0

1

0

1

Dedicated Charger Emulation Cycle

Data Pass-through

BC1.2 DCP

BC1.2 SDP - See Note 8.1

Dedicated Charger Emulation Cycle

Data Pass-through

BC1.2 CDP

Note 8.1 BC1.2 SDP behaves the same as the Data Pass-through mode with the exception that it

is preceded by a VBUS discharge when the mode is entered per the BC1.2 specification.

8.3

8.4

BC1.2 Detection Renegotiation

The BC1.2 specification allows a charger to act as an SDP, CDP, or DCP and to change between these

roles. To force an attached portable device to repeat the charging detection procedure, VBUS must be

cycled. In compliance with this specification, the UCS1001 automatically cycles VBUS when switching

between the BC1.2 SDP, BC1.2 DCP, and BC1.2 CDP modes.

Data Pass-through (No Charger Emulation)

When commanded to Data Pass-through mode, UCS1001 will close its USB high-speed data switch

to allow USB communications between a portable device and host controller and will operate using trip

current limiting. No charger emulation profiles are applied in this mode. Data Pass-through mode will

persist until commanded otherwise by the M1, M2, and EM_EN controls.

APPLICATION NOTE: If it is desired that the Data Pass-through mode operates as a traditional / standard port

power switch, the S0 control should be set to ‘0’. When entering this mode, there is no

automatic VBUS discharge.

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APPLICATION NOTE: When the M1, M2, and EM_EN controls are set to ‘0’, ‘1’, ‘0’ or to ‘1’, ‘1’, ‘0’ respectively,

Data Pass-through mode will persist if the PWR_EN control is disabled; however, the

UCS1001 will draw more current. To leave Data Pass-through mode, the PWR_EN control

must be enabled before the M1, M2, and EM_EN controls are changed to the desired mode.

8.5

BC1.2 SDP (No Charger Emulation)

When commanded to BC1.2 SDP mode, UCS1001 will discharge VBUS, close its USB high-speed

data switch to allow USB communications between a portable device and host controller, and will

operate using trip current limiting. No charger emulation profiles are applied in this mode. BC1.2 SDP

mode will persist until commanded otherwise by the M1, M2, EM_EN, and PWR_EN controls.

APPLICATION NOTE: If it is desired that the BC1.2 SDP mode operates as a traditional / standard port power

switch, the S0 control should be set to ‘0’.

8.6

BC1.2 CDP

When BC1.2 CDP is selected as the Active mode, UCS1001 will discharge VBUS, close its USB high-

speed data switch, and apply the BC1.2 CDP charger emulation profile which performs handshaking

per the specification. The combination of the UCS1001 CDP handshake along with a standard USB

host comprises a charging downstream port.

If the handshake is successful, the UCS1001 will operate using constant current limiting (variable

slope). If the handshake is not successful, the UCS1001 will leave the applied CDP profile in place,

leave the high-speed switch closed, enable constant current limiting, and persist in this condition until

commanded otherwise by the M1, M2, EM_EN, and PWR_EN controls.

The UCS1001 will respond per the BC1.2 specification to portable device initiated charger

renegotiation requests.

APPLICATION NOTE: BC1.2 compliance testing may require the S0 control to be set to ‘0’ (Attach and Removal

Detection feature disabled) while testing is in progress.

APPLICATION NOTE: When the UCS1001 is in BC1.2 CDP mode and the Attach and Removal Detection feature

is enabled, if a power thief, such as a USB light or fan, attaches but does not assert DP, a

Removal event will not occur when the portable device is removed. However, if a standard

USB device is subsequently attached, Removal Detection will again be fully functional. As

well, if PWR_EN is cycled or M1, M2, and / or EM_EN change state, a Removal event will

occur and Attach Detection will be reactivated.

8.6.1

BC1.2 CDP Charger Emulation Profile

The BC1.2 CDP charger emulation profile acts as described below.

APPLICATION NOTE: All CDP handshaking is performed with the high-speed switch closed.

1. VBUS voltage is applied.

2. Primary Detection - When the portable device drives a voltage between 0.4 V and 0.8 V onto the

DPOUT pin, the UCS1001 will drive 0.6 V onto the DMOUT pin within 20 ms.

3. When the portable device drives the DPOUT pin back to ‘0’, the UCS1001 will then drive the

DMOUT pin back to ‘0’ within 20 ms.

4. Optional Secondary Detection - If the portable device then drives a voltage of 0.6 V (nominal) onto

the DMOUT pin, the UCS1001 will take no other action. This will cause the portable device to

observe a ‘0’ on the DPOUT pin and know that it is connected to a CDP.

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8.7

BC1.2 DCP

When BC1.2 DCP is selected as the Active mode, UCS1001 will discharge VBUS and apply the BC1.2

DCP charger emulation profile per the specification. In BC1.2 DCP mode, the requirement for portable

device current draw is automatically disabled. When the BC1.2 DCP charger emulation profile is

applied within the Dedicated Charger Emulation Cycle (see Section 8.10.3, "Legacy 3 Charger

Emulation Profile"), the current draw requirement enabled.

If the portable device is charging after the DCP charger emulation profile is applied, the UCS1001 will

leave in place the resistive short, leave the high-speed switch open, and enable constant current

limiting (variable slope).

APPLICATION NOTE: BC1.2 compliance testing may require the S0 control to be set to ‘0’ (Attach and Removal

Detection feature disabled) while testing is in progress.

8.7.1

BC1.2 DCP Charger Emulation Profile

The BC1.2 DCP charger emulation profile is described below.

1. VBUS voltage is applied. A resistor (R_{DCP_RES}) is connected between the DPOUT and DMOUT

pins.

2. Primary Detection - If the portable device drives 0.6 V (nominal) onto the DPOUT pin, the UCS1001

will take no other action than to leave the resistor connected between DPOUT and DMOUT. This

will cause the portable device to see 0.6 V (nominal) on the DMOUT pin and know that it is

connected to a DCP.

3. Optional Secondary Detection - If the portable device drives 0.6 V (nominal) onto the DMOUT pin,

the UCS1001 will take no other action than to leave the resistor connected between DPOUT and

DMOUT. This will cause the portable device to see 0.6 V (nominal) on the DPOUT pin and know

that it is connected to a DCP.

8.8

Dedicated Charger

When commanded to Dedicated Charger Emulation Cycle mode, the UCS1001 enables an attached

portable device to enter its charging mode by applying specific charger emulation profiles in a

predefined sequence. Using these profiles, the UCS1001 is capable of generating and recognizing

several signal levels on the DPOUT and DMOUT pins. The preloaded charger emulation profiles

include ones compatible with YD/T-1591 (2009), Apple, Samsung, and many RIM portable devices.

No active USB data communication is possible when charging in this mode.

8.8.1

Emulation Reset

Prior to applying any of the charger emulation profiles, the UCS1001 will perform an emulation reset.

This involves the following:

1. The UCS1001 resets the VBUS line by disconnecting the port power switch and connecting VBUS

to ground via an internal 100 Ω resistor. The port power switch will be held open for a time equal

to t_{EM_RESET}at which point the port power switch will be closed and the VBUS voltage applied.

2. The DPOUT and DMOUT pins will be pulled low using internal 15 kΩ pull-down resistors.

APPLICATION NOTE: To help prevent possible damage to a portable device, the DPOUT and DMOUT pins have

current limiting in place when the emulation profiles are applied.

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8.8.2

Emulation Cycling

In Dedicated Charger Emulation Cycle mode, the charger emulation profiles will be applied in the

following order:

1. Legacy 1

2. Legacy 2

3. Legacy 3

4. Legacy 4

5. Legacy 5

6. Legacy 6

7. Legacy 7

APPLICATION NOTE: If S0=’0’ and a portable device is not attached in DCE Cycle mode, the UCS1001 will be

cycling through charger emulation profiles. There is no guarantee which charger emulation

profile will be applied first when a portable device attaches.

The UCS1001 will apply a charger emulation profile until one of the following exit conditions occurs:

1. Current greater than I_{BUS_CHG}is detected flowing out of VBUS at the respective emulation timeout

time. In this case, the profile is assumed to be accepted and no other profiles will be applied.

2. The respective emulation timeout (t_{EM_TIMEOUT}) time is reached without current that exceeds the

I_{BUS_CHG}limit flowing out of VBUS. The profile is assumed to be rejected, and the UCS1001 will

perform emulation reset and apply the next profile, if there is one.

8.8.3

DCE Cycle Retry

If none of the charger emulation profiles cause a charge current to be drawn, the UCS1001 will perform

emulation reset and cycle through the profiles again. The UCS1001 will continue to cycle through the

profiles so as long as charging current is not drawn and the PWR_EN control is enabled.

8.9

Current Limit Mode Associations

The UCS1001 will close the port power switch and use the current limiting mode as shown in Table 8.2.

Table 8.2 Current Limit Mode Options

ACTIVE MODE

CURRENT LIMIT MODE

Data Pass-through

BC1.2 SDP

Trip mode

BC1.2 CDP

CC mode if ILIM < 1.5 A, otherwise, trip mode

BC1.2 DCP

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Table 8.2 Current Limit Mode Options (continued)

ACTIVE MODE

DCE CYCLE

CURRENT LIMIT MODE

During DCE Cycle when a charger

emulation profile is being applied

CC mode if ILIM < 1.5 A, otherwise, trip mode

Trip mode

Legacy 2 charger emulation profile

accepted

Legacy 1 or Legacy 3 - Legacy 7 charger

emulation profile accepted

8.10 Preloaded Charger Emulation Profiles

The following charger emulation profiles are resident to the UCS1001:

1. Legacy 1 - See Section 8.10.1

2. Legacy 2, 4, 5, and 7 - See Section 8.10.2

3. Legacy 3 - See Section 8.10.3

4. Legacy 6 - See Section 8.10.4

5. BC1.2 CDP - See Section 8.6.1

6. BC1.2 DCP - See Section 8.7.1

8.10.1

Legacy 1 Charger Emulation Profile

Legacy 1 charger emulation profile does the following:

1. The UCS1001 will apply 900 mV to both the DPOUT and the DMOUT pins.

2. VBUS voltage is applied.

3. If the portable device is charging, the UCS1001 will accept that the currently applied profile is the

correct charger emulation profile for the attached portable device. The voltages applied to the

DPOUT and DMOUT pins will remain in place. The UCS1001 will begin operating in trip mode

4. If the portable device is not charging, the UCS1001 will stop the currently applied charger emulation

profile. This will cause all voltages put onto the DPOUT and DMOUT pins to be removed. Emulation

reset occurs, and the UCS1001 will initiate the next charger emulation profile.

8.10.2

Legacy 2, 4, 5, and 7 Charger Emulation Profiles

Legacy 2, 4, 5, and 7 charger emulation profiles follow the same pattern of operation although the

voltage that is applied on the DPOUT and DMOUT pins will vary. They do the following:

1. The UCS1001 will apply a voltage on the DPOUT pin using either a current-limited voltage source

or a voltage divider between VBUS and ground with the center tap on the DPOUT pin.

2. The UCS1001 will apply a possibly different voltage on the DMOUT pin using either a current-

limited voltage source or a voltage divider between VBUS and ground with the center tap on the

DMOUT pin.

3. VBUS voltage is applied.

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4. If the portable device is charging, the UCS1001 will accept that the currently applied profile is the

correct charger emulation profile for the attached portable device. The voltages applied to the

DPOUT and DMOUT pins will remain in place. The UCS1001 will begin operating in trip mode

5. If the portable device is not charging, the UCS1001 will stop the currently applied charger emulation

profile. This will cause all voltages put onto the DPOUT and DMOUT pins to be removed. Emulation

reset occurs, and the UCS1001 will initiate the next charger emulation profile.

8.10.3

Legacy 3 Charger Emulation Profile

The Legacy 3 charger emulation profile does the following:

1. The UCS1001 will connect a resistor (R_{DCP_RES}) between DPOUT and DMOUT.

2. VBUS is applied.

3. If the portable device is charging, the UCS1001 will accept that this is the correct charger emulation

profile for the attached portable device. The resistive short between the DPOUT and DMOUT pins

will be left in place.

4. If the portable device is not charging, the UCS1001 will stop the Legacy 3 charger emulation. This

will cause resistive short between the DPOUT and DMOUT pins to be removed. Emulation reset

occurs, and the UCS1001 will initiate the next charger emulation profile.

8.10.4

Legacy 6 Charger Emulation Profile

The Legacy 6 charger emulation profile does the following:

1. The UCS1001 will apply a voltage on the DPOUT pin using a voltage divider between VBUS and

ground with the center tap on the DPOUT pin.

2. VBUS voltage is applied.

3. If the portable device is charging, the UCS1001 will accept that Legacy 6 is the correct charger

emulation profile for the attached portable device. The voltage applied to the DPOUT pin will

remain in place. The UCS1001 will begin operating in trip mode

4. If the portable device is not charging, the UCS1001 will stop the Legacy 6 charger emulation profile.

This will cause the voltage put onto the DPOUT pin to be removed. Emulation reset occurs, and

the UCS1001 will initiate the next charger emulation profile.

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Chapter 9 Package Information

Figure 9.1 UCS1001 Package View

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USB Port Power Controller with Charger Emulation

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Figure 9.2 UCS1001 Package Dimensions and Notes

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Chapter 10 Typical Operating Curves

Figure 10.1 USB-IF High-speed Eye Diagram (without

data switch)

Figure 10.2 USB-IF High-speed Eye Diagram (with

data switch)

Figure 10.3 Short Applied After Power Up

Figure 10.4 Power Up Into A Short

Figure 10.5 Internal Power Switch Short Response

Figure 10.6 VBUS Discharge Behavior

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Figure 10.7 Data Switch Off Isolation vs. Frequency

Figure 10.8 Data Switch Bandwidth vs. Frequency

Figure 10.9 Data Switch On Resistance vs. Temp

Figure 10.10 Power Switch On Resistance vs. Temp

Figure 10.11 R_{DCP_RES}Resistance vs.Temp

Figure 10.12 Power Switch On / Off Time vs. Temp

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Figure 10.13 VS Over-Voltage Threshold vs. Temp

Figure 10.15 Detect State VBUS vs. IBUS

Figure 10.17 IBUS Measurement Accuracy

Figure 10.14 VS Under Voltage Threshold vs. Temp

Figure 10.16 Trip Current Limit Operation vs. Temp.

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Figure 10.18 Active State Current vs. Temp

Figure 10.19 Detect State Current vs. Temp

Figure 10.20 Sleep State Current vs. Temp

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Chapter 11 Document Revision History

Table 11.1 Customer Revision History

REVISION

LEVEL & DATE

SECTION/FIGURE/ENTRY

CORRECTION



Added patent information to cover

Added specifications for I

Revision 1.4

(07-16-13)

Cover

/ I

and I

BUS_CHG

Table 3.3, "Electrical

Specifications"

DET_QUAL REM_QUAL



Updated text for DCE cycle behavior. Changed cycle order for

1001-3 and 1001-4.

Section 9.8.2, "Emulation

Cycling"



Added Pin Wake Time (t

).

Revision 1.3

(02-14-13)

Table 3.3, "Electrical

Specifications"

PIN_WAKE

Changed I

from 8 µA (MAX) to 15 µA (MAX) per

SLEEP

characterization data.



Added 12W Current Limit changes.

Changed ~3ms to t

. Removed third example: “Wake

Figure 4.5, "Wake Timing"

PIN_WAKE

with S0 & PWR_EN to Auto-transition Detect State (VS >

VS_UVLO, M1 & M2 & EM_EN not all ‘0’ and not set to Data

Pass-through)”.



After system diagrams, noted that is available.

Chapter 4, General

Description

Added.

Chapter 11, Document

Revision History

Certification added: “UL recognized and EN/IEC 60950-1

(CB) certified”

Revision 1.2

(05-21-12)

Cover



Source voltage: Vs MIN moved from 2.7 to 2.9 V to

accommodate UL

Revision 1.2

(05-16-12)

Cover



Source voltage: Vs MIN moved from 2.7 to 2.9 V to

accommodate UL

Table 3.3, "Electrical

Specifications"

There are nine preloaded charger emulation profiles.

Cover



Changed “unused connection” to n/a for ILIM, SEL, LATCH,

and S0 pins as they must be used.

Added Note 2.1: Total leakage current from pins 3 and 4

(VBUS) to ground must be less than 100 µA for proper attach

/ removal detection operation.

Chapter 2, Pin Description



Updated selectable current limits (ILIMx) min and max values.

Typical values did not change.

Table 3.3, "Electrical

Specifications"



Changed I

from 500 µA (TYP) to 650 µA (TYP).

from TBD µA (MAX) to 750 µA (MAX).

from TBD µA (MAX) to 8 µA (MAX).

ACTIVE

SLEEP



“Behavior” cell in the "Sleep" row: Clarified behavior by

adding "VBUS will be near ground potential”.

Table 4.1, "Power States

Control Settings"

Clarified behavior by adding "VBUS will be near ground

potential”.

Section 4.1.2, "Sleep State

Operation"

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Table 11.1 Customer Revision History (continued)

REVISION

LEVEL & DATE

SECTION/FIGURE/ENTRY

CORRECTION



Section “Back-voltage / Back-drive Detection” split into two.

In Section 4.2.4, "Back-drive Current Protection", corrected

Section 4.2.3, "Back-voltage

Detection" and Section

4.2.4, "Back-drive Current

Protection"

reference I

to match elec spec symbol I

and

BD_LK

BD_1

rewrote back-drive description.



Added: The current limiting mode used depends on the Active

state mode (see Section 9.9, "Current Limit Mode

Associations").

Section 6.2.4, "Current

Limiting Modes"

Added application note: To avoid cycling in trip mode, set ILIM

higher than the highest expected portable device current

draw.

Section 6.2.4.1, "Trip Mode"



Rearranged rows so DCE Cycle is grouped together.

Added row for DCE Cycle when a charger emulation profile is

being applied.

Table 9.2, "Current Limit

Mode Options"



Legacy 7 charger emulation profile .

Section 9.8.2, "Emulation

Cycling"

and

Section 9.11.5, "Legacy 7

Charger Emulation Profile"



Rearranged order of TOCs.

Added new TOCs:

Chapter 10, Typical

Operating Curves

—

Figure 10.3, "Short Applied After Power Up"

Figure 10.5, "Internal Power Switch Short Response"

Figure 10.16, "Trip Current Limit Operation vs. Temp."

Figure 10.17, "IBUS Measurement Accuracy"

Figure 10.18, "Active State Current vs. Temp"

Figure 10.19, "Detect State Current vs. Temp"

Figure 10.20, "Sleep State Current vs. Temp"



Updated the following:

—

Figure 10.6, "VBUS Discharge Behavior"

Figure 10.11, "RDCP_RES Resistance vs.Temp"

Figure 10.13, "VS Over-Voltage Threshold vs. Temp"

Figure 10.14, "VS Under Voltage Threshold vs. Temp"

Figure 10.15, "Detect State VBUS vs. IBUS"



Missing units added.

Revision 1.1

(11-21-11)

Table 3.2, "Power

Dissipation Summary"

Changed t

from 400 ms to 800 ms typ and

Table 3.3, "Electrical

Specifications"

DET_CHARGE

changed condition from C

max.

= 220 µF to C

= 500 µF

BUS



VS Leakage Current changed from 0.8 µA typical to 2.2 µA.

Changed I

and I

from TBD typ to 0 µA typ and from

BD_1

BD_2

1.5 µA max to 2 µA max



Changed I

Changed t

to I

and changed typ from 165 to 190 mA.

TST

ON_PSW

TEST

from 3 ms to 0.75 ms typical and

from 1 ms to 0.75 ms typical.

t

OFF_PSW_INA



Charged Device Model: changed from 200 V to 500 V

Table 3.4, "ESD

Ratings"Section 3.1



Added note: In order to transition from Active state Data Pass-

through mode into Sleep with these settings, change the M1,

M2, and EM_EN pins before changing the PWR_EN pin.

Note 4.1

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Table 11.1 Customer Revision History (continued)

REVISION

LEVEL & DATE

SECTION/FIGURE/ENTRY

CORRECTION



The high-speed switch is open in Sleep.

Table 4.1, "Power States

Control Settings",

Section 4.1.2, "Sleep State

Operation",

Section 5.1, "USB High-

speed Data Switch"



Added.

Section 4.2.2, "VS Source

Voltage"

Legacy 6 profile has been defined.

Cover, Section 9.11.3,

"Legacy 1, 3, 4, and 6

Charger Emulation Profiles"



Data Pass-through persists until M1, M2, or EM_EN controls

are changed. It is no longer affected by PWR_EN. Added

application note: When the M1, M2, and EM_EN controls are

set to ‘0’, ‘1’, ‘0’ or to ‘1’, ‘1’, ‘0’ respectively, Data Pass-

through mode will persist if the PWR_EN control is disabled;

however, the UCS1001 will draw more current. To leave Data

Pass-through mode, the PWR_EN control must be enabled

before the M1, M2, and EM_EN controls are changed to the

desired mode.

Revision 1.1

(11-21-11)

cont.

Section 9.4, "Data Pass-

through (No Charger

Emulation)"



BC1.2 CDP mode uses constant current limiting. Added

application note: BC1.2 compliance testing may require the

S0 control to be set to ‘0’ (Attach and Removal Detection

feature disabled) while testing is in progress.

Added application note: When the UCSX100X is in BC1.2

CDP mode and the Attach and Removal Detection feature is

enabled, if a power thief, such as a USB light or fan, attaches

but does not assert DP, a Removal event will not occur when

the portable device is removed. However, if a standard USB

device is subsequently attached, Removal Detection will

again be fully functional. As well, if PWR_EN is cycled or M1,

M2, and / or EM_EN change state, a Removal event will

occur and Attach Detection will be reactivated.

Section 9.6, "BC1.2 CDP"



Added application note: BC1.2 compliance testing may

require the S0 control to be set to ‘0’ (Attach and Removal

Detection feature disabled) while testing is in progress.

Section 9.7, "BC1.2 DCP"



BC1.2 CDP charger emulation changed from using “trip” to

“CC mode if ILIM < 1.5 A, otherwise, trip mode”.

Table 9.2, "Current Limit

Mode Options"

Added. The Legacy 5 charger emulation profile no longer

applies a voltage divider. It applies 900 mV to DPOUT and

DMOUT.

Section 9.11.4, "Legacy 5

Charger Emulation Profile"

Revision 1.0

(08-18-11)

Initial Release

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DATASHEET


型号：	UCS1001-3-BP-TR
厂家：	SMSC CORPORATION
描述：	USB Port Power Controller with Charger Emulation
文件：	总57页 (文件大小：781K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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