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TPS65552A Datasheet

  • TPS65552A

  • 集成的照片閃存充電器和 IGBT 驅(qū)動器

  • 773.68KB

  • 18頁

  • TI

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RGT
DGQ
TPS65552A
www.ti.com
SLVS567 鈥?JULY 2005
INTEGRATED PHOTO FLASH CHARGER AND IGBT DRIVER
FEATURES
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Highly Integrated Solution to Reduce
Components
Integrated 50-V Power Switch,
R
(ON)
= 200 m鈩?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
鈥?MAX On Time
鈥?Over V
DS
Shutdown
鈥?Thermal Monitor
APPLICATIONS
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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 discreet 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.
VA
V
5 V
VCC
VBAT
SW
T1
1:10
or
1:11
or
1:12
D1
C1
VOUT
V
VF
CHG
Controller
or
D Q
F2
U1
V_FULL
D/A Vonv.
or
U2
Analog Circuit
I_PEAK
Max ON
LOGIC
30 m鈩?/div>
PGND
U3
or
I_PEAK1
I_PEAK2
VCC
F_ON
U4
G_IGBT
SW1
5[V] drive IGBT
TSD
NC
VCC
ENA
U0
0 V DS
D Q
F1
Internal
ENA
XFULL
V
VF
R1
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.
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 漏 2005, Texas Instruments Incorporated
PRODUCT PREVIEW

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