G5967 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Boost WLED Driver for Backlights

Global Mixed-mode Technology
G5967
Boost WLED Driver for Backlights
Features
„ 5V to 24 V Input Supply Voltage
„ Boost Converter
Š Automatically Adjusting Output Voltage
Š Integrated 2.0A 50V NFET
Š Over Current Protection
Š Over Voltage Protection
Š Over 90% High Efficiency
„ Six Channel Current Sink
Š Maximum 30mA Current Sink
Š 3% Current Matching and Accuracy
Š 100:1 PWM Brightness Dimming Range
„ Open/Short LED protection
„ Thermal Shutdown
„ Small 20-pin 4mmX4mm TQFN package
Applications
„ Notebook Displays LED Backlighting
„ LCD Monitor LED Backlighting
Ordering Information
ORDER
NUMBER
G5967R91U
Note: R9: TQFN4X4-20
1: Bonding Code
U: Tape & Reel
Pin Configuration
MARKING
5967
General Description
The G5967 is a 6-channel boost WLED driver for
backlight applications. It features a high-performance
boost converter, six channel current sink with 3% cur-
rent matching and accuracy, and PWM brightness
dimming control.
The boost converter automatically provides the regulated
output voltage for the WLED backlight without the need
to calculate the output for different LED types. It also
integrates a 50V NFET that provides high output power.
The 6-channel current sink is ideal for constant current
driving, and, well matched less than 3% (typical). To
set the maximum driving current, the ISET pin is used
to determine reference current. Each channel of the
current sink is set to 58 times of this reference current.
A PWM pin can be used for PWM dimming.
The G5967 provides many protection schemes to
avoid any abnormal operation. Over current protection
is designed to protect internal NFET. It also provides
over voltage and over temperature protection. The
G5967 can detect open or short LED and offer protec-
tions.
The G5967 is available in a 20-pin 4X4mm TQFN
package.
TEMP.
RANGE
-40°C to 85°C
PACKAGE
(Green)
TQFN4X4-20
Typical Application Circuit
EN 1
NC 2
BYP 3
VIN 4
RT 5
Thermal
Pad
15 CH2
14 CH3
13 GND
12 CH4
11 CH5
G5967 TQFN4X4-20
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
5V to 24V
10µH
4.7µF
6.6µF
1µF
0.1µF
IN
BYP
GND
EN
PWM
SW
OVP
CH1
CH2
G5967
CH3
CH4
CH5
CH6
RT COMP SS ^ISET
Ver: 0.4
Sep 04, 2012
TEL: [phone]
http://www.gmt.com.tw
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