AP2181SG-U [DIODES]
Buffer/Inverter Based Peripheral Driver, 1 Driver, 2A, PDSO8, GREEN, SOP-8;
| 型号： | AP2181SG-U |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | Buffer/Inverter Based Peripheral Driver, 1 Driver, 2A, PDSO8, GREEN, SOP-8 驱动 光电二极管 接口集成电路 驱动器 |
| 文件： | 总15页 (文件大小：335K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Description
Features
The AP2181 and AP2191 are integrated high-side power switches
optimized for Universal Serial Bus (USB) and other hot-swap
applications. The family of devices complies with USB 2.0 and
available with both polarities of Enable input. They offer current
and thermal limiting and short circuit protection as well as
controlled rise time and under-voltage lockout functionality. A 7ms
deglitch capability on the open-drain Flag output prevents false
over-current reporting and does not require any external
•
•
•
•
•
•
•
•
•
•
•
•
Single USB port power switches
Over-current and thermal protection
2.1A accurate current limiting
Reverse Current Blocking
115mΩ on-resistance
Input voltage range: 2.7V – 5.5V
0.6ms typical rise time
Very low shutdown current: 1uA (max)
Fault report (FLG) with blanking time (7ms typ)
ESD protection: 4KV HBM, 400V MM
Active low (AP2181) or active high (AP2191) enable
MSOP-8L-EP package ambient temperature range:
-40ºC to 85°C
components.
All devices are available in SOP-8L, MSOP-8L-EP and SOT25
packages.
•
•
SOT25 and SOP-8L packages ambient temperature
range: 0ºC to 70°C
SOT25, SOP-8L and MSOP-8L-EP (Exposed Pad):
Available in “Green” Molding Compound (No Br, Sb)
Lead Free Finish / RoHS Compliant (Note 1)
UL pending, File E322375
•
•
Applications
•
•
•
Consumer electronics – LCD TV & Monitor, Game Machines
Communications – Set-Top-Box, GPS, Smartphone
Computing – Laptop, Desktop, Servers, Printers, Docking Station, HUB
Ordering Information
AP 21 X 1 XX G - X
Packing
Lead Free
G : Green
Enable
Channel
1 : 1 Channel
Package
W : SOT25
S : SOP-8L
U : Tube
7/13 : Tape & Reel
8 : Active Low
9 : Active High
MP : MSOP-8L-EP
Tube
Part Number
7”/13” Tape and Reel
Package
Code
Packaging
(Note 2)
Device
Part Number
Quantity
Quantity
Suffix
NA
-U
NA
-U
Suffix
AP21X1WG-7
W
S
S
MP
MP
SOT25
SOP-8L
SOP-8L
NA
100
NA
80
3000/Tape & Reel
NA
-7
NA
AP21X1SG-U
AP21X1SG-13
AP21X1MPG-U
AP21X1MPG-13
2500/Tape & Reel
NA
-13
NA
MSOP-8L-EP
MSOP-8L-EP
NA
NA
2500/Tape & Reel
-13
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP2181/AP2191 Rev. 2
1 of 15
OCTOBER 2008
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© Diodes Incorporated
AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Pin Assignment
( Top View )
( Top View )
1
2
3
4
8
7
6
5
GND
IN
NC
NC
1
2
8
7
6
GND
IN
OUT
OUT
OUT
FLG
3
4
IN
IN
OUT
FLG
5
EN
EN
MSOP-8L-EP
SOP-8L
( Top View )
1
OUT
5
4
IN
2
3
GND
FLG
EN
SOT25
Pin Descriptions
Pin Number
Pin Name
SOP-8L
Descriptions
SOT25
MSOP-8L-EP
GND
IN
1
2, 3
4
2
5
4
3
Ground
Voltage input pin (all IN pins must be tied together externally)
Enable input, active low (AP2181) or active high (AP2191)
EN
Over-current and over-temperature fault report; open-drain flag is
active low when triggered
FLG
5
OUT
NC
6, 7
8
1
Voltage output pin (all OUT pins must be tied together externally)
No internal connection; recommend tie to OUT pins
N/A
AP2181/AP2191 Rev. 2
2 of 15
OCTOBER 2008
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© Diodes Incorporated
AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Functional Block Diagram
AP2181, AP2191
Current
Sense
IN
OUT
UVLO
Current
Limit
Driver
EN
FLG
Deglitch
Thermal
Sense
GND
Typical Application Circuit
AP2191 Enable Active High
IN
Load
OUT
Power Supply
2.7V to 5.5V
0.1uF
0.1uF
10uF
10k
120uF
FLG
EN
GND
ON
OFF
Available Options
Part Number
Current limit
(typical)
Recommended maximum
continuous load current
Channel
Enable pin (EN)
AP2181
AP2191
1
1
Active Low
Active High
2.1A
2.1A
1.5A
1.5A
AP2181/AP2191 Rev. 2
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Absolute Maximum Ratings
Symbol
ESD HBM
ESD MM
VIN
Parameter
Ratings
Units
KV
V
Human Body Model ESD Protection
Machine Model ESD Protection
Input Voltage
4
400
6.5
V
VOUT
Output Voltage
VIN + 0.3
6.5
V
VEN , VFLG
Iload
Enable Voltage
V
Maximum Continuous Load Current
Maximum Junction Temperature
Storage Temperature Range
Internal Limited
150
A
TJmax
°C
°C
TST
-65 ~ 150
Recommended Operating Conditions
Symbol
Parameter
Min
Max
Units
Input voltage
2.7
0
-40
0
5.5
1.5
85
V
A
VIN
IOUT
Output Current
Operating Ambient
Temperature
MSOP-8L-EP
SOT25 and SOP-8L
TA
°C
70
AP2181/AP2191 Rev. 2
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OCTOBER 2008
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Electrical Characteristics
(TA = 25oC, VIN = +5.0V, unless otherwise stated)
Symbol
VUVLO
ISHDN
IQ
ILEAK
IREV
Parameter
Input UVLO
Test Conditions
Min Typ. Max Unit
Rload=1kΩ
1.6
1.9
0.5
45
2.5
1
70
1
V
Input Shutdown Current
Input Quiescent Current
Input Leakage Current
Reverse Leakage Current
Disabled, IOUT= 0
Enabled, IOUT= 0
Disabled, OUT grounded
μA
μA
μA
μA
Disabled, VIN= 0V, VOUT= 5V, IREV at VIN
MSOP-8L-EP, -40oC≤ TA ≤85oC
1
115
115
120
150
150
160
VIN = 5V,
SOT25, 0oC ≤ TA ≤ 70oC
SOP-8L, 0oC ≤ TA ≤ 70oC
MSOP-8L-EP, -40oC≤ TA ≤85oC
SOT25 & SOP-8L, 0oC ≤ TA ≤
70oC
mΩ
IOUT= 0.5A
RDS(ON) Switch on-resistance
VIN = 3.3V,
IOUT= 0.5A
140
2.0
2.1
180
mΩ
A
ISHORT Short-Circuit Current Limit
Enabled into short circuit, CL=68μF
VIN= 5V,
OUT= 4.5V,
CL=68μF
MSOP-8L-EP, -40oC≤ TA ≤85oC
SOT25 & SOP-8L, 0oC ≤ TA ≤
V
ILIMIT
Over-Load Current Limit
1.6
2
2.6
A
70oC
Current limiting trigger
threshold
EN Input Logic Low Voltage
EN Input Logic High Voltage VIN = 2.7V to 5.5V
EN Input leakage
ITrig
3.0
A
Output Current Slew rate (<100A/s) , CL=22μF
VIL
VIH
ISINK
VIN = 2.7V to 5.5V
0.8
1
V
V
VEN = 5V
μA
ms
ms
ms
ms
Ω
ms
°C
°C
TD(ON) Output turn-on delay time
TR Output turn-on rise time
TD(OFF) Output turn-off delay time
0.05
0.6
0.01
0.05
30
7
140
25
CL=1μF, Rload=10Ω
CL=1μF, Rload=10Ω
CL=1μF, Rload=10Ω
CL=1μF, Rload=10Ω
1.5
TF
Output turn-off fall time
FLG output FET on-resistance
0.1
50
15
RFLG
I
FLG =10mA, CL=68μF
CIN=10uF, CL=68μF
TSHDN Thermal Shutdown Threshold Enabled, Rload=1kΩ
TBlank FLG blanking time
4
THYS
Thermal Shutdown Hysteresis
SOP-8L (Note 3)
MSOP-8L-EP (Note 4)
SOT25 (Note 5)
110
60
oC/W
oC/W
oC/W
Thermal Resistance
Junction-to-Ambient
θJA
157
Notes:
3. Test condition for SOP-8L: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout.
4. Test condition for MSOP-8L-EP: Device mounted on 2” x 2” FR-4 substrate PC board, 2oz copper, with minimum recommended pad on top
layer and thermal vias to bottom layer ground plane.
5. Test condition for SOT25: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout.
AP2181/AP2191 Rev. 2
5 of 15
OCTOBER 2008
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Typical Performance Characteristics
VEN
VEN
50%
50%
50%
50%
TD(OFF)
TD(OFF)
TR
TR
TF
TF
TD(ON)
TD(ON)
90%
90%
90%
90%
VOUT
VOUT
10%
10%
10%
10%
Figure 1. Voltage Waveforms: AP2181 (left), AP2191 (right)
All Enable Plots are for AP2191 Active High
Turn-On Delay and Rise Time
Turn-Off Delay and Fall Time
Ven
Ven
5V/div
5V/div
Vout
2V/div
Vout
2V/div
C =1uF
L
T
A
=25°C
C =1uF
L
R =5ꢀ
L
T
A
=25°C
R =5ꢀ
L
400us/div
400us/div
Turn-On Delay and Rise Time
Turn-Off Delay and Fall Time
Ven
Ven
5V/div
5V/div
Vout
2V/div
Vout
2V/div
C =100uF
L
T
=25°C
A
C =100uF
L
R =5ꢀ
L
T
A
=25°C
R =5ꢀ
L
400us/div
400us/div
AP2181/AP2191 Rev. 2
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Typical Performance Characteristics
(Continued)
Short Circuit Current,
Device Enabled Into Short
Inrush Current
Ven
Ven
5V/div
5V/div
CL=470uF
VIN=5V
TA=25°C
RL=3.3ꢀ
CL=100uF
Iout
500mA/div
Iout
500mA/div
V
=5V
IN
T
=25°C
A
C
=68uF
L
CL=220uF
1ms/div
500us/div
0.6 Ω Load Connected to Enabled Device
Short Circuit with Blanking Time and Recovery
V
=5V
V
=5V
IN
IN
T
=25°C
T
=25°C
A
A
Vout
5V/div
C =68uF
C =68uF
L
L
Vflag
2V/div
Vflag
5V/div
Iout
1A/div
Iout
2A/div
2ms/div
20ms/div
Power On
UVLO Increasing
Vflag
5V/div
Vin
2V/div
T
=25°C
=68uF
=3.3ꢀ
A
C
R
L
L
Iout
500mA/div
T
=25°C
A
Ven
5V/div
C
R
=68uF
L
L
Iout
500mA/div
=3.3ꢀ
Vin
5V/div
1ms/div
1ms/div
AP2181/AP2191 Rev. 2
7 of 15
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Typical Performance Characteristics
(Continued)
UVLO Decreasing
T
A
=25°C
C =68uF
L
Vin
2V/div
R =3.3ꢀ
L
Iout
500mA/div
10ms/div
Turn-On Time vs Input Voltage
Turn-Off Time vs Input Voltage
850
750
650
550
450
350
250
55
50
45
40
35
30
25
C =1uF
L
R =10ꢀ
L
T
A
=25°C
C
R
=1uF
L
=10ꢀ
L
T
=25°C
A
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Input Voltage (V)
Rise Time vs Input Voltage
Fall Time vs Input Voltage
650
600
550
500
450
400
350
300
25
24
23
22
21
20
19
C =1uF
L
C
R
=1uF
=10ꢀ
=25°C
L
R =10ꢀ
L
L
T
A
=25°C
T
A
2
2.5
3
3.5
4
4.5
5
5.5
6
2
2.5
3
3.5
4
4.5
5
5.5
6
Input Voltage (V)
Input Voltage (V)
AP2181/AP2191 Rev. 2
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OCTOBER 2008
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Typical Performance Characteristics
(Continued)
Supply Current, Output Enabled vs Ambient Temperature
Supply Current, Output Disabled vs Ambient Temperature
52
47
42
37
32
27
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
Vin=5.5V
Vin=5.0V
Vin=5.0V
Vin=5.5V
Vin=3.3V
Vin=2.7V
Vin=3.3V
Vin=2.7V
60
-60
-40
-20
0
20
40
80
100
-60
-40
-20
0
20
40
60
80
100
Ambient Temperature (°C)
Ambient Temperature (°C)
Static Drain-Source On-State Resistance vs Ambient
Temperature
Short-Circuit Output Current vs Ambient Temperature
2.60
2.50
2.40
2.30
2.20
2.10
2.00
180
C
=100uF
L
Vin=2.7V
170
160
150
140
130
120
110
100
90
Vin=2.7V
Vin=5.0V
Vin=3.3V
Vin=3.3V
Vin=5V
Vin=5.5V
80
80
-60
-40
-20
0
20
40
60
80
100
-60
-40
-20
0
20
40
60
100
Ambient Temperature (°C)
Ambient Temperature (°C)
Undervoltage Lockout vs Ambient Temperature
Threshold Trip Current vs Input Voltage
2.15
2.10
2.05
2.00
1.95
1.90
3.24
3.22
3.20
3.18
3.16
3.14
3.12
3.10
3.08
UVLO Rising
T
=25°C
A
C =68uF
L
UVLO Falling
2.8
3.3
3.8
4.3
4.8
5.3
-60
-40
-20
0
20
40
60
80
100
Input Voltage (V)
Ambient Temperature (°C)
AP2181/AP2191 Rev. 2
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Typical Performance Characteristics
(Continued)
Current Limit Response vs Peak Current
45
40
35
30
25
20
15
10
5
V
=5V
IN
T
=25°C
A
0
0
2
4
6
8
10
12
Peak Current (A)
AP2181/AP2191 Rev. 2
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Application Note
Power Supply Considerations
A 0.01-μF to 0.1-μF X7R or X5R ceramic bypass capacitor between IN and GND, close to the device, is
recommended. Placing a high-value electrolytic capacitor on the input and output pin(s) is recommended
when the output load is heavy. This precaution reduces power-supply transients that may cause ringing on
the input. Additionally, bypassing the output with a 0.01-μF to 0.1-μF ceramic capacitor improves the
immunity of the device to short-circuit transients.
Over-current and Short Circuit Protection
An internal sensing FET is employed to check for over-current conditions. Unlike current-sense resistors,
sense FETs do not increase the series resistance of the current path. When an overcurrent condition is
detected, the device maintains a constant output current and reduces the output voltage accordingly.
Complete shutdown occurs only if the fault stays long enough to activate thermal limiting.
Three possible overload conditions can occur. In the first condition, the output has been shorted to GND
before the device is enabled or before VIN has been applied. The AP2181/AP2191 senses the short circuit
and immediately clamps output current to a certain safe level namely ILIMIT
.
In the second condition, an output short or an overload occurs while the device is enabled. At the instance
the overload occurs, higher current may flow for a very short period of time before the current limit function
can react. After the current limit function has tripped (reached the over-current trip threshold), the device
switches into current limiting mode and the current is clamped at ILIMIT
.
In the third condition, the load has been gradually increased beyond the recommended operating current.
The current is permitted to rise until the current-limit threshold (ITRIG) is reached or until the thermal limit of
the device is exceeded. The AP2181/AP2191 is capable of delivering current up to the current-limit threshold
without damaging the device. Once the threshold has been reached, the device switches into its current
limiting mode and is set at ILIMIT
.
FLG Response
When an over-current or over-temperature shutdown condition is encountered, the FLG open-drain output
goes active low after a nominal 7-ms deglitch timeout. The FLG output remains low until both over-current
and over-temperature conditions are removed. Connecting a heavy capacitive load to the output of the
device can cause a momentary over-current condition, which does not trigger the FLG due to the 7-ms
deglitch timeout. The AP2181/AP2191 is designed to eliminate false over-current reporting without the need
of external components to remove unwanted pulses.
Power Dissipation and Junction Temperature
The low on-resistance of the internal MOSFET allows the small surface-mount packages to pass large
current. Using the maximum operating ambient temperature (TA) and RDS(ON), the power dissipation can be
calculated by:
PD = RDS(ON)× I2
Finally, calculate the junction temperature:
TJ = PD x RθJA + TA
Where:
TA= Ambient temperature °C
RθJA = Thermal resistance
PD = Total power dissipation
AP2181/AP2191 Rev. 2
11 of 15
OCTOBER 2008
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AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Application Note (Continued)
Thermal Protection
Thermal protection prevents the IC from damage when heavy-overload or short-circuit faults are present for
extended periods of time. The AP2181/AP2191 implements a thermal sensing to monitor the operating
junction temperature of the power distribution switch. Once the die temperature rises to approximately 140°C
due to excessive power dissipation in an over-current or short-circuit condition the internal thermal sense
circuitry turns the power switch off, thus preventing the power switch from damage. Hysteresis is built into
the thermal sense circuit allowing the device to cool down approximately 25°C before the switch turns back
on. The switch continues to cycle in this manner until the load fault or input power is removed. The FLG
open-drain output is asserted when an over-temperature shutdown or over-current occurs with 7-ms deglitch.
Under-voltage Lockout (UVLO)
Under-voltage lockout function (UVLO) keeps the internal power switch from being turned on until the power
supply has reached at least 1.9V, even if the switch is enabled. Whenever the input voltage falls below
approximately 1.9V, the power switch is quickly turned off. This facilitates the design of hot-insertion systems
where it is not possible to turn off the power switch before input power is removed.
Host/Self-Powered HUBs
Hosts and self-powered hubs (SPH) have a local power supply that powers the embedded functions and the
downstream ports (see Figure 2). This power supply must provide from 5.25V to 4.75V to the board side of
the downstream connection under both full-load and no-load conditions. Hosts and SPHs are required to
have current-limit protection and must report over-current conditions to the USB controller. Typical SPHs are
desktop PCs, monitors, printers, and stand-alone hubs.
Figure 2. Typical One-Port USB Host / Self-Powered Hub
Generic Hot-Plug Applications
In many applications it may be necessary to remove modules or pc boards while the main unit is still
operating. These are considered hot-plug applications. Such implementations require the control of current
surges seen by the main power supply and the card being inserted. The most effective way to control these
surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in
which a power supply normally turns on. Due to the controlled rise times and fall times of the
AP2181/AP2191, these devices can be used to provide a softer start-up to devices being hot-plugged into a
powered system. The UVLO feature of the AP2181/AP2191 also ensures that the switch is off after the card
has been removed, and that the switch is off during the next insertion.
By placing the AP2181/AP2191 between the VCC input and the rest of the circuitry, the input power reaches
these devices first after insertion. The typical rise time of the switch is approximately 1ms, providing a slow
voltage ramp at the output of the device. This implementation controls system surge current and provides a
hot-plugging mechanism for any device.
AP2181/AP2191 Rev. 2
12 of 15
OCTOBER 2008
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© Diodes Incorporated
AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Marking Information
(1) SOP-8L
(Top view)
8
1
7
6
5
4
Logo
Part Number
8 : Active Low
9 : Active High
1 : 1 Channel
AP21X X
YY XX
X
X
G : Green
Internal Code
Xth week : 01~52
Year :
"07" = 2007
"08" = 2008
2
3
(2) MSOP-8L-EP
( Top view )
8
1
7
6
5
A~Z : Green
Logo
Part
Y M X
Month : A~L=01~12
Year :
"7" = 2007
"8" = 2008
AP21X X
Number
8 : Active Low
9 : Active High
1 : 1 Channel
2
3
4
(3) SOT25
(Top View)
5
1
4
XX : Identification code
Y : Year 0~9
M : Month A~L
M X
XX Y
X : A~Z : Green
2
3
Device
Package type
Identification Code
AP2181W
AP2191W
SOT25
SOT25
HX
HY
AP2181/AP2191 Rev. 2
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OCTOBER 2008
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© Diodes Incorporated
AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Package Information (All Dimensions in mm)
(1) Package Type: SOP-8L
Gauge Plane
Seating Plane
0.38/1.27
Detail "A"
7°~9°
7°~9°
0.35max.
45°
Detail "A"
0.3/0.5
3.70/4.10
1.27typ
0.78
4.80/5.30
8x-0.60
6x-1.27
Land Pattern Recommendation
(Unit: mm)
(2) Package Type: MSOP-8L-EP
1.65/1.95
"A"
EXPOSED PAD
(BOTTOM)
1
1
0.3
0.65Bsc.
2.9/3.0
Gauge plane
0.4/0.8
0.95Ref.
DETAIL "A"
0.05
1
EXPOSED PAD
(BOTTOM)
8x-0.32
6x-0.65
Land Pattem Recommendation
(Unit:mm)
AP2181/AP2191 Rev. 2
14 of 15
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OCTOBER 2008
© Diodes Incorporated
AP2181/AP2191
1.5A SINGLE CHANNEL CURRENT-LIMITED POWER
SWITCH
Package Information (Continued)
(3) Package Type: SOT25
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agreeto hold Diodes Incorporatedand all the companieswhose products are represented onour website, harmlessagainst all damages.
LIFE SUPPORT
Diodes Incorporated productsare not authorizedfor use as criticalcomponents in lifesupport devices or systemswithout theexpressed written approval of the
President of DiodesIncorporated.
AP2181/AP2191 Rev. 2
15 of 15
OCTOBER 2008
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© Diodes Incorporated
相关型号：
AP2181WG-7
Buffer/Inverter Based Peripheral Driver, 1 Driver, 2A, PDSO5, GREEN, SOT-25, 5 PIN
DIODES
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