A723 [ADDTEK]
HIGH VOLTAGE BOOST DRIVER WITH 8 CHANNELS CONSTANT CURRENT REGULATORS; 8通道恒流稳流器高压升压驱动器
| 型号： | A723 |
| 厂家： | 
ADDTEK CORP |
| 描述： | HIGH VOLTAGE BOOST DRIVER WITH 8 CHANNELS CONSTANT CURRENT REGULATORS |
| 文件： | 总1页 (文件大小：72K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A723
HIGH VOLTAGE BOOST DRIVER WITH
8 CHANNELS CONSTANT CURRENT REGULATORS
www.addmtek.com
DESCRIPTION
FEATURES
The A723 is a high voltage Boost driver with 8 channels
adjustable constant current regulators for LED backlight
applications. Eight regulated current ports are designed to
provide uniform and pure DC constant current sinks for driving
LEDs within a large range VF variations. It can drive a number
of LEDs in series/parallel configuration.
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High frequency DC/DC converter for LEDs.
Integrated 50V power MOSFET.
4.5V ~ 25V wide input voltage range.
8 constant-current output channels.
Output current adjustable through external resistor.
Constant output current range: 5mA~30mA.
Users may adjust the output current from 5mA to 30mA
through an external resistor, RSET, which gives users flexibility
in controlling the light intensity of LEDs. It also could adjust
LED brightness from 0% to 100% via PWM pin with Pulse
Width Modulation signal.
45V current sinks breakdown voltage for up to 12
pcs of LEDs in series.
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LED open/short protection.
Green Package.
A feedback circuit is built in the between of Boost Driver
and the Current Regulators. It could output 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.
APPLICATIONS
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Automotive interior lighting
The thermal protection function protects IC from over
temperature damage. Also, the exposed thermal pad enhances
the package power dissipation.
LED backlight driver for NB and Monitors.
TYPICAL APPLICATION CIRCUIT
PACKAGE PIN OUT
VIN = 4.5V~25V
VOUT
L
COUT
CIN
DF
PWM
ON/OFF
CBP
20
19
18
17
16
SHDN
BYP
VIN
1
2
3
4
5
15
14
13
OUT4
GND
SHDN
OUT4
BYP
VIN
GND
GND
GND
－
VLED
＋
A723
12
11
OUT5
OUT6
RT
RT
RT
OUT5
OUT6
CVFB
CVFB
7
9
10
6
8
RP
RSET
CSS
CP1
R1
R2
QFN 4mm x 4mm
(Top View)
ORDER INFORMATION
QFN 4mm x 4mm
20 pin
K
Green Part
A723KGT
Note: The letter “G” is marked for Green parts, and letter “T” is marked for Tape & Reel.
Copyright © 2009 ADDtek Corp.
1
V0.8 -- FEBRUARY 2009
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