TPS65552A_16 Datasheet, PDF (1/16 Pages) Texas Instruments – INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER

Not Recommended for New designs
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RGT DGQ
TPS65552A
SLVS567 – JULY 2005
INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER
FEATURES
• Highly Integrated Solution to Reduce
Components
• Integrated 50-V Power Switch,
R_(ON) = 200 mΩ Typical
• Integrated IGBT Driver
• High Efficiency
• Programmable Peak Current, 0.95 A ~ 1.8 A
• Input Voltage of 1.8 V to 12 V
• Optimized Control Loop for Fast Charge Time
• Sensing All Trigger From Primary Side
• 10-Pin MSOP/16-Pin QFN Package
• Protection
– MAX On Time
– Over V_DS Shutdown
– Thermal Monitor
APPLICATIONS
• Digital Still Cameras (DSC)
• Optical Film Cameras
• Mobile Phones With Camera
• PDAs With Camera
DESCRIPTION
This device offers a complete solution for charging a
photo flash capacitor from battery input, and sub-
sequently discharging the capacitor to the xenon
tube. The device has an integrated power switch,
IGBT driver, and control logic blocks for charge
applications. Compared with discrete solutions, the
device significantly reduces the component count,
shrinks the solution size, and eases design com-
plexity. Additional advantages are fast charging time
and high efficiency due to the optimized PWM control
algorithm.
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.
VVF
Controller
or
CHG
D/A Vonv.
or
Analog Circuit
I_PEAK
or
F_ON
V5 V
VCC
0 V DS
VBAT
DQ
F1
Internal
ENA
VA D1
VOUT
T1
C1
1:10
SW
or
1:11
or
1:12
XFULL
VVF
R1
U1
V_FULL
U2
DQ
F2
ENA
Max ON
LOGIC
U3
I_PEAK1
I_PEAK2
TSD
VCC
U0
30 mΩ
PGND
NC
VCC
U4
G_IGBT
SW1
5[V] drive IGBT
Figure 1. Typical Application Circuit⁽¹⁾
(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-
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.
Copyright © 2005, Texas Instruments Incorporated