APW8739 Datasheet, PDF (1/28 Pages) Anpec Electronics Coropration – 4-Channel LED Backlight Converter with SMBus Controlled

APW8739
4-Channel LED Backlight Converter with SMBus Controlled
Features
• 4 channels
• 6V to 24V Input Voltage Supply
• Drive up to 68(17x4) White LEDs
(3.5V/180mA each)
• Current Match (balance) +/- 1% (Typ.)
• Current Accuracy +/-1% (Typ.)
• Built internal SW MOSFET Rds(on) 0.25 ohm (typ.)
• SMBus control to program below:
-LED Current: 22.58mA to 180 mA
-Switching Frequency: 200KHz to 900KHz
-Dimming mode: PWM, DC and Mixed-mode
General Description
The APW8739 is a high efficiency driver for 4 channels of
LEDs. It’s a wide range input voltage operating from 6V to
24V. It’s capable of driving typically 68 (17x4) pieces of 3.
5V/180mA LEDs. It contains 4 channels of voltage con-
trolled current sources with typical current matching of
+1%. It’s built internal Rds(on) 0.25 ohm (typ.) with cur-
rent mode control. The APW8739 be able to control LED
current by SMBus interface. SMBus control LED current
made had PWM, DC and Mixed-mode. The APW8739 has
enable, shutdown function and Fault detection function.
The APW8739 features extensive protection functions that
include UVLO, Current limit, LED strings open and short
circuit detections, Output Over-Voltage Protection (OVP)
and Over Temperature Protection (OTP). The APW8739
is available in TDFN5x5-16 Packages.
• Enable / Shutdown Function and Fault indication
• Built in UVLO Control Detection on VIN
• Built in Protection function:
-Built in Internal MOSFET Current Limit function
about 3.3A (Typ.)
-String Open / Short Circuit Detection
-Over Voltage Protection
-Over Temperature Protection
Applications
• AIO Backlight
• Available in TDFN 5x5-16 Packages
• Halogen and Lead Free Available (RoHS Compliant)
Simplified Application Circuit
V_IN
V_OUT
SMBDAT
SMBCLK
VIN
LX
EN
PW M
OVP
FAULT
GND
APW8739
SMBDAT
SMBCLK
COMP
VDC
ISEN1
ISEN 2
ISEN 3
ISEN 4
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
1
Rev. A.2 - Dec., 2015
www.anpec.com.tw