G5967 Global Mixed-mode Technology Boost WLED Driver for Backlights Features General Description 5V to 24 V Input Supply Voltage Boost Converter Automatically Adjusting Output Voltage Integrated 2.0A 50V NFET Over Current Protection Over Voltage Protection Over 90% High Efficiency Six Channel Current Sink Maximum 30mA Current Sink 3% Current Matching and Accuracy 100:1 PWM Brightness Dimming Range Open/Short LED protection Thermal Shutdown Small 20-pin 4mmX4mm TQFN package 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% current matching and accuracy, and PWM brightness dimming control. Applications 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 protections. 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. Notebook Displays LED Backlighting LCD Monitor LED Backlighting The G5967 is available in a 20-pin 4X4mm TQFN package. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5967R91U 5967 -40°C to 85°C TQFN4X4-20 Note: R9: TQFN4X4-20 1: Bonding Code U: Tape & Reel Typical Application Circuit NC SW NC CH1 19 18 17 16 PWM 20 Pin Configuration 5V to 24V EN 1 15 CH2 2 14 CH3 BYP 3 13 GND VIN 4 12 CH4 5 BYP G5967 GND 9 0.1µF 10 8 SS OVP 1µF EN CH6 7 CH5 SW IN COMP 6 OVP 11 ISET RT 6.6µF 4.7µF NC Thermal Pad 10µH PWM RT CH1 CH2 CH3 CH4 CH5 CH6 COMP SS ISET G5967 TQFN4X4-20 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 Sep 04, 2012 1