TS1910CSRLG [TSC]

680kHz/1.2MHz High Voltage Boost Converter;


型号：	TS1910CSRLG
厂家：	TAIWAN SEMICONDUCTOR COMPANY, LTD
描述：	680kHz/1.2MHz High Voltage Boost Converter
文件：	总8页 (文件大小：188K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TS1910

680kHz/1.2MHz High Voltage Boost Converter

SOP-8EP

Pin Definition:

1. COMP

2. FB

8. SS

7. FREQ

3. EN

4. GND

6. VCC

5. LX

General Description

The TS1910 is a high performance, high efficiency step up DC-DC Converter with integrated 2A. The TS1910

converter input voltage ranging from 2.6 to 5.5V. The Output voltage can be set up to 27V. The selectable

frequency of 680kHz and 1.2MHz allows the use of small external inductors and capacitors and provides fast

transient response. Current mode control with external compensation network makes it easy to stabilize the

system and keep maximum flexibility. Programmable soft start function minimizes impact on the input power

system. Internal power MOSFET with very low R_DS(ON)provides high efficiency. The TS1910 automatically transits

from PWM to PFM during light load condition further increasing efficiency. The converter also provides protection

functions such as Current Limit and Thermal shutdown.

Features

Application

●

2.6V to 5.5V operating input voltage range

●

Digital Still Cameras

Adjustable output voltage range up to 27V

Up to 2A output switch current

Portable Electronics

PDA’s and Palm-Top Computers

Local Boost Regulator

680K/1.2MHz Selectable Switching Frequency

Programmable soft-start function

External Compensation Network

Current limit and Thermal shutdown protection

Under voltage Lockout

≤1µA Shutdown Current

Ordering Information

Part No.

Package

Packing

TS1910CS RLG

SOP-8EP

2.5Kpcs / 13” Reel

Note: “G” denotes for Halogen Free

Absolute Maximum Rating

Parameter

Symbol

Limit

Unit

VCC Pin Voltage

V_CC

GND - 0.3 to GND + 6

EN, FREQ,COMP,FB,SS, Pin Voltage

LX Pin Voltage

GND - 0.3 to V_CC+ 0.3

V_LX

T_ST

T_OP

θ_JC

θ_JA

( T_J-T_A) / θ_JA

-65 to +150

-40 to +125

Power Dissipation

°C

Storage Temperature Range

Operating Junction Temperature Range

Thermal Resistance from Junction to case

Thermal Resistance from Junction to ambient

°C

°C/W

Note: θ_JAis measured with the PCB copper area of approximately 1.5 in2(Multi-layer). That copper area needs

connect to exposed pad.

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Version: A12

TS1910

680kHz/1.2MHz High Voltage Boost Converter

Electrical Specifications (Ta = 25^oC, V_IN=5V, EN=V_IN, I_L=0A unless otherwise noted)

Characteristics

Symbol

V_CC

Conditions

Min

2.6

Typ

Max Units

Input Voltage range

5.5

2.6

Under Voltage Lockout

UVLO Hysteresis

UVLO

UVLOhys

V_OUT

Rising

2.35

-150

Step-Up Voltage Adjust Range

Operating quiescent current

Shutdown current

V_CC+0.5

I_CCQ

I_OUT= 0mA, V_FB=1.5V

V_EN=0V

150

0.1

250

µA

I_SD

Feedback Voltage

V_FB

1.219

-100

1.238

0.01

1.257

+100

FB Input Leakage Current

I_FB-LKG

V_FB= 1.5V

V_IN=2.6 to 5.5V

Line Regulation

Load Regulation

REG_LINE

REG_LOAD

0.2

_OUT=20mA

V_IN=5V

_OUT= 1mA to 0.4A

0.15

FREQ=High

FREQ=Low

900

500

1200

680

1500

850

Oscillator frequency

F_OSC

KHz

FREQ high-level input voltage

FREQ low-level input voltage

FREQ input leakage current

Soft Start Current

V_FQ-IH

V_FQ-IL

I_FQ-LKG

I_SS

0.5

0.1

FREQ=GND

µA

N-channel MOSFET current limit

I_LIM

Duty=40%

2.5

200

160

V_IN=3V, I_SW=1A

V_IN=5V, I_SW=1A

280

220

MOSFET on-resistance

R_DS(on)

mΩ

(Note)

EN high-level input voltage

EN low-level input voltage

EN Hysteresis

V_IH

V_IL

1.0

0.4

ENhys

I_EN-LKG

Duty

I_LXL

200

0.01

µA

EN input leakage current

Maximum Duty Cycle

V_EN=GND or V_IN

V_FB=0V

0.1

LX Leakage Current

V_LX= 25V, V_FB=1.5V

µA

Thermal Shutdown

TSD

Thys

150

°C

Thermal Shutdown Hysteresis

Note: Guaranteed by design

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Version: A12

TS1910

680kHz/1.2MHz High Voltage Boost Converter

Block Diagram

VCC

Soft

Start

1.238V

Reference

Thermal

Shutdown

Enable/

Disable

7uA

Error

Amplifier

Summing

Comparator

Control and

Driver Logic

COMP

N-MOS

Oscillator

FREQ

SGND

PGND

Current

Sense

Slope

Compensation

Pin Description

Pin Number

Pin Name

COMP

Description

Compensation Pin

Feedback Pin

Enable Pin

GND

Ground Pin

Switch Output Pin

Power Input pin

V_CC

Frequency select pin. The power switch operates at 680kHz if FREQ is

connected to GND and at 1.2MHz if FREQ is connected to VCC

Soft start Pin. Connect a capacitor to GND

FREQ

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Version: A12

TS1910

680kHz/1.2MHz High Voltage Boost Converter

Application Circuit

FREQ=High (Frequency=1.2MHz)

VIN=5V

VOUT=12V

4.7uH

B340A

4.7~100

130K

VCC

FREQ

220pF

GND

2*10uF

3*10uF

15K

COMP

0.1uF

AX5510A

10nF

100K

1nF

100pF

VOUT = 1.238V X (1 + ------- )

R8 Suggest 10K~30K

VIN

≦

4.5V, R3=10

VIN > 4.5V, R3=100

FREQ=Low (Frequency=680KHz)

VIN=5V

B340A

VOUT=12V

6.8uH

130K

4.7~100

VCC

220pF

FREQ

GND

2*10uF

3*10uF

15K

COMP

0.1uF

AX5510A

10K

100K

1nF

10nF

100pF

VOUT = 1.238V X (1 + ------- )

R8 Suggest 10K~30K

VIN ≦ 4.5V, R3=10Ω

VIN > 4.5V, R3=100Ω

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Version: A12

TS1910

680kHz/1.2MHz High Voltage Boost Converter

Compensation Table

Frequency(Hz)

L1 (H)

VIN (V)

2.5~4.4

2.5~5.5

2.5~4.0

2.5~5.5

VOUT (V)

R6 (Ω)

10K

C7 (F)

1.2n

470p

270p

150p

120p

100p

82p

15K

27K

56K

680K

(FREQ=Low)

6.8u

150K

110K

150K

100K

33K

47p

39K

390p

220p

100p

68p

39K

100K

130K

150K

220K

390K

1.2M

(FREQ=High)

4.7u

56p

47p

39p

Application Information

Setting the Output Voltage

Application circuit item shows the basic application circuit with TS1910 adjustable output version. The external

resistor sets the output voltage according to the following equation:

V_OUT=1.238V x (1+R2/R8)

For most applications, R8 is a suggested a value by 10~30KΩ. Place the resistor-divider as close to the IC as

possible to reduce the noise sensitivity.

Soft Start Capacitor

The soft-start function begins from SS pin Voltage=0V to V_CCwith a 7uA (typ.) constant current charging to the soft-

start capacitor, so the capacitor should be large enough to let the output voltage reach regulation inside the soft-start

cycle. Typical value of soft-start capacitor range is from 4.7nF to 100nF. After the cycle finished, the load can start to

draw maximum current as required.

Frequency Select Pin (FREQ)

The frequency select pin FREQ allows to set the switching frequency of the device to 680 KHz (FREQ = low) or 1.2

MHz (FREQ = high). Higher switching frequency improves load transient response but reduces slightly the

efficiency. The other benefits of higher switching frequency are a lower output ripple voltage. Usually, it is

recommended to use 1.2 MHz switching frequency unless light load efficiency is a major concern.

5/8

Version: A12

TS1910

680kHz/1.2MHz High Voltage Boost Converter

Application Information (Continue)

Under Voltage Lockout (UVLO)

To avoid mis-operation of the device at low input voltages an under voltage lockout is included that disables the

device, if the input voltage falls below (2.35V-150mV).

Input Capacitor Selection

For better input bypassing, low-ESR ceramic capacitors are recommended for performance. Two parallel 10uF (or

one 22uF) input capacitor is sufficient for most applications. For a lower output power requirement application, this

value can be decreased.

Output Capacitor Selection

For lower output voltage ripple, low-ESR output capacitor like ceramic capacitor is recommended. Three 10uF

ceramic capacitors work for most of the applications. Higher capacitor values can be used to improve the load

transient response and reduce output ripple.

Layout Guide

6/8

Version: A12

TS1910

680kHz/1.2MHz High Voltage Boost Converter

SOP-8EP Mechanical Drawing

SOP-8EP DIMENSION

MILLIMETERS

INCHES

MIN

DIM

MIN

4.80

3.80

1.35

0.35

2.05

2.82

0.40

MAX

5.00

4.00

1.75

0.49

2.41

3.30

1.25

MAX.

0.196

0.157

0.068

0.019

0.095

0.130

0.049

0.189

0.150

0.054

0.014

0.081

0.111

0.016

1.27BSC

0.05BSC

0.10

0º

0.25

7º

0.004

0º

0.009

7º

5.80

0.25

6.20

0.50

0.229

0.010

0.244

0.019

7/8

Version: A12

TS1910

680kHz/1.2MHz High Voltage Boost Converter

Notice

Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,

assumes no responsibility or liability for any errors or inaccuracies.

Information contained herein is intended to provide a product description only. No license, express or implied, to

any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of

sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty,

relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose,

merchantability, or infringement of any patent, copyright, or other intellectual property right.

The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.

Customers using or selling these products for use in such applications do so at their own risk and agree to fully

indemnify TSC for any damages resulting from such improper use or sale.

8/8

Version: A12