G5966

G5966
Global Mixed-mode Technology Inc.
Boost WLED Driver for Backlights
Features
General Description
„
The G5966 is a 6-channel boost WLED driver for
backlight applications. It features a high-performance
boost converter, six channel current sink with 3% current matching and accuracy, and PWM brightness
dimming control.
5V to 24 V Input Supply Voltage
„ Boost Converter
Š Automatically Adjusting Output Voltage
Š 1.0MHz Switching Frequency
Š Integrated 2.0A 40V NFET
Š Internal Loop Compensation and Soft
Start
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 16-pin 3mmx3mm TQFN package
The boost converter automatically provides the regulated
output voltage for the WLED backlight without the need
to calculate the output for different LED types. The
switching frequency is 1MHz. It also integrates a 40V
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 1000 times of this reference current. A PWM pin can be used for PWM dimming.
The G5966 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
G5966 can detect open or short LED and offer protections.
Applications
„
„
Notebook Displays LED Backlighting
LCD Monitor LED Backlighting
The G5966 is available in a 16-pin 3x3mm TQFN
package.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5966R41U
5966
-40°C to 85°C
TQFN3X3-16
Note: R4: TQFN3X3-16
1: Bonding Code
U: Tape & Reel
Typical Application Circuit
10µH
CH5
5V to 24V
PGND
1
12
CH4
SW
2
11
PWM
IN
3
10
GND
OUT
4
9
CH3
Thermal
Pad
4.7µF
4.7µF
13
CH6
14
EN
15
16
NC
Pin Configuration
SW
OUT
IN
1µF
CH1
BYP
5
6
7
8
GND
ISET
BYP
CH1
CH2
0.1µF
EN
G5966
CH2
CH3
CH4
PWM
G5966 TQFN3X3-16
CH5
PGND
ISET
CH6
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.4
Mar 16, 2011
1