Preliminary
RT9591
Smart Photoflash Capacitor Charger with IGBT Driver
General Description
The RT9591 is a highly integrated photoflash charging
solution in digital and film cameras. It is targeted for
applications that use either
two AA batteries or a single
lithium-ion battery.
The RT9591 integrates a constant current controller for
charging high voltage photoflash capacitor quickly and
efficiently, an IGBT driver for igniting flash tube, and a
voltage detector. Only a few external components are
used to reduce PCB space and cost.
RT9591 is available in VQFN-16L 3x3 package.
Features
1.8V to 6.5V
Battery Input Voltage Range
Charges Any Size Photoflash Capacitor
Adjustable Input Current
Uses Standard Transformers
Adjustable Output Voltage
Charge Complete Indicator
Built-in IGBT Driver for IGBT Application
Built-in Voltage Detector
16-Lead VQFN Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Ordering Information
RT9591
Package Type
QV : VQFN-16L 3x3 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Digital Still Camera
Film Camera Flash Unit
Camera Phone Flash
Pin Configurations
(TOP VIEW)
GNDDRV
12
11
10
9
DRVOUT
VDRV
IMCD
VDOUT
FBVD
Note :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
100% matte tin (Sn) plating.
FB
PGND
EXT
GND
1
2
3
4
VDD
CS
DRVIN
CHARGE
STAT
VBAT
Richtek Pb-free and Green products are :
16 15 14 13
GND
17
5 6 7 8
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
VQFN-16L 3x3
Patent Pending
DS9591-07 August 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
