A704
SWITCHING MODE LED DRIVER
www.addmtek.com
DESCRIPTION
FEATURES
The A704 is a PWM high efficiency LED driver
controller. The LED string is driven at constant current
rather than constant voltage, thus providing constant light
output and enhanced reliability.
ꢀ Low Startup Current (5uA in typical).
ꢀ Low Operating Current (3mA in typical).
ꢀ Lead-Edge Blanking.
ꢀ Internal OVP Detected.
ꢀ 150°C OTP Sensor with Hysteresis.
ꢀ Under Voltage Lockout (UVLO).
ꢀ Fixed PWM Frequency.
ꢀ PFC > 0.9 with Suitable External Components.
TYPICAL APPLICATION CIRCUIT
APPLICATIONS
ꢀ
ꢀ
B22, E27 lamp device
RD
General purpose lighting
VDD
EN
R1
A704
*Note
Cs
DR
PACKAGE PIN OUT
CS
Gate
GND
DBR
L1
RG
Q
RCS
L
5
VDD
1
2
3
Gate
85VAC
|
235VAC
Bridge
Diode
LED
CX
CIN
DF
COUT
GND
EN
4
CS
SOT-23-5
(Top View)
*Note: CS MUST be very close to A704’s VDD pin and GND pin.
Please refer to ADDtek’s reference layout.
ORDER INFORMATION
SOT-23-5
5 pin
W
A704WFT
Note: The letter “F” is marked for Lead Free parts, and letter “T” is marked for Tape & Reel.
Contack Info:Samsun Zhang 13556850583 IC9898@163.com
Copyright © 2008 ADDtek Corp.
1
A704_V0.6 -- AUGUST 2008
ADDTEK [ ADDTEK CORP ]
