TPS65561 Datasheet, PDF (1/16 Pages) Texas Instruments – INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER

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RGT
TPS65561
SLVS691 – FEBRUARY 2007
INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER
FEATURES
• Highly Integrated Solution to Reduce
Components
• Integrated Voltage Reference
• Integrated 50-V Power Switch,
• Integrated IGBT Driver
• High Efficiency
• Programmable Peak Current: 1.1 A to 2.2 A
• Input Battery Voltage of 1.6 V to 12 V
• Optimized Control Loop for Fast Charge Time
• Output Voltage Feedback From Primary Side
• 16-Pin QFN Package
• Protection
– MAX On Time
– MAX Off Time
– Overcurrent Shutdown to Monitor V_DS at
the SW pin (OV_DS)
– Thermal Monitor
APPLICATIONS
• Digital Still Cameras
• Optical Film Cameras
DESCRIPTION
This device offers a complete solution for charging a
photo flash capacitor from a battery input, and
subsequently discharging the capacitor to a xenon
flash tube. The device has an integrated voltage
reference, power switch, IGBT driver, and control
logic blocks for capacitor charging applications and
driving IGBT applications. Compared with discrete
solutions, this device reduces the component count,
shrinks the solution size, and eases designs for
xenon tube applications. Additional advantages are a
fast charging time and high efficiency from an
optimized PWM control algorithm.
Other provisions of the device includes sensing the
output voltage from the primary side, programmable
peak current, thermal shutdown, an output pin for
charge completion, and input pins for charge enable
and flash enable.
V_I/F
Controller
or
D/A Conv _or
Analog
Circuit
or
CHG
I_PEAK
VCC
VCC
VBAT
T1
SW
D1
V_A
V_O
C1
0 Vds
DQ
F1
U1
V_FULL
DQ
F2
ENA
I_PEAK
Ref.
SW
U2
TSD
U3
Max ON
LOGIC
ENA
VCC
U0
V_ref
XFULL
V_I/F
R1
PGND
F_ON
ENA
VCC
U4
G_IGBT
SW1
IGBT
NC
Figure 1. Typical Application Circuit
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated