A707 ADDtek Corp, A707 Datasheet

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A707

Manufacturer Part Number
A707
Description
HIGH Voltage Boost Driver WITH 3 Channels Constant Current Regulators
Manufacturer
ADDtek Corp
Datasheet
Copyright © 2008 ADDtek Corp.
adjustable constant current regulators for notebook LED
backlight applications. Three regulated current ports are
designed to provide uniform and pure DC constant current sinks
for driving LEDs within a large range V
a number of LEDs in series/parallel configuration
through an external resistor, R
in controlling the light intensity of LEDs. It also could adjust
LED brightness via PWM pin with Pulse Width Modulation
signal.
and the Current Regulators. It could sense the lowest dropout
voltage among used channels to Boost Driver in order to
maintain the output voltage in optimal level. An OVP circuit is
built for open-loop protection when any string becomes open.
temperature damage. Also, the exposed thermal pad enhances
the package power dissipation.
V
ON/OFF
IN
PWM
=4.5V~25V
Note: The letter “G” is marked for Green parts, and letter “T” is marked for Tape & Reel.
F
The A707 is a high voltage Boost driver with 3 channels
Users may adjust the output current from 5mA to 30mA
A feedback circuit is built in the between of Boost Driver
The thermal protection function protects IC from over
C
IN
C
www.addmtek.com
R
TYPICAL APPLICATION CIRCUIT
BP
T
BYP
RT
SHDN
VIN
TSSOP
14 pin
A707FGT
R
DESCRIPTION
SET
L
A707
C
R
SS
SS
SET
D
F
, which gives users flexibility
R
C
P
P1
OUT1
OUT3
OUT2
C
OUT
F
V
variations. It can drive
OUT
ORDER INFORMATION
V
LED
3 C
R
R
2
1
1
HANNELS
High frequency DC/DC converter for LEDs.
Integrated 40V power MOSFET.
4.5V ~ 25V wide input voltage range.
3 constant-current output channels.
Output current adjustable through external resistor.
Constant output current range: 5mA~30mA.
40V output sustaining voltage for up to 10 pcs of LEDs
in series.
LED open/short protection.
TSSOP-14L Green Package.
Automotive interior lighting
LED backlight driver for NB and Monitors.
H
IGH
C
ONSTANT
SHDN
CVFB
PWM
ISET
BYP
V
VIN
RT
OLTAGE
PACKAGE PIN OUT
1
2
3
4
5
6
7
APPLICATIONS
FEATURES
(Top View)
TSSOP-14
C
B
URRENT
OOST
V1.2 -- DECEMBER 2008
14
13
12
11
10
9
8
D
R
SS
SW
OUT3
OUT2
OUT1
COMP
GND
RIVER
EGULATORS
A707
W
ITH

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