RGT

DGQ

www.ti.com

FEATURES

APPLICATIONS

DESCRIPTION

T1

PGND

SW

VBAT

F_ON

G_IGBT

CHG

I_PEAK

NC

D

Q

F1

D

Q

F2

XFULL

or

or

or

V5 V

VCC

VA

D1

C1

VOUT

VVF

R1

30 m

Ω

U0

VCC

LOGIC

Max ON

ENA

Internal

ENA

0 V DS

U1

V_FULL

U2

U3

I_PEAK1

I_PEAK2

TSD

Analog Circuit

D/A Vonv.

Controller

VVF

1:10

or

1:11

or

1:12

U4

VCC

5[V] drive IGBT

SW1

TPS65552A

SLVS567 – JULY 2005

INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER

•

Digital Still Cameras (DSC)

•

Highly Integrated Solution to Reduce

Components

•

Optical Film Cameras

•

Mobile Phones With Camera

•

Integrated 50-V Power Switch,

•

PDAs With Camera

•

Integrated IGBT Driver

•

High Efficiency

This device offers a complete solution for charging a

•

Programmable Peak Current, 0.95 A ~ 1.8 A

photo flash capacitor from battery input, and sub-

•

Input Voltage of 1.8 V to 12 V

sequently discharging the capacitor to the xenon

•

Optimized Control Loop for Fast Charge Time

tube. The device has an integrated power switch,

IGBT driver, and control logic blocks for charge

•

Sensing All Trigger From Primary Side

applications. Compared with discrete solutions, the

•

10-Pin MSOP/16-Pin QFN Package

device significantly reduces the component count,

•

Protection

shrinks the solution size, and eases design com-

– MAX On Time

plexity. Additional advantages are fast charging time

and high efficiency due to the optimized PWM control

algorithm.

– Thermal Monitor

Other provisions of the device includes four options

for

determining

a

different

target

voltage,

programmable peak current, thermal disable monitor,

input signal for charge enable, flash enable, and an

output signal for charge completion status.

(1)

TI assumes no responsibility for the consequences of use of this application circuit, such as an infringement of intellectual property rights

or other rights, including patents, of third parties.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.

PRODUCT PREVIEW information concerns products in the forma-

Copyright © 2005, Texas Instruments Incorporated

tive or design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the

right to change or discontinue these products without notice.

Not Recommended for New designs