ver: 0.4 sep 04, 2012 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5967 global mixed-mode technology boost wled driver for backlights features ? 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 applications ? notebook displays led backlighting ? lcd monitor led backlighting 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. 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 pin configuration typical application circuit ch1 pwm sw G5967 tqfn4x4-20 1 2 3 4 5 11 12 13 14 15 16 17 18 20 19 8 7 9 10 thermal pad 6 nc en byp vin rt ovp iset comp ch5 ch4 gnd ch3 ch2 nc nc ss ch6 note: recommend connecting the thermal pad to the ground for excellent power dissipation. sw ovp ch1 ch2 ch3 ch4 ch5 ch6 iset ss in byp gnd en pwm 5v to 24v G5967 10 h comp rt 4.7 f 6.6 f 0.1 f 1 f ch1 pwm sw G5967 tqfn4x4-20 1 2 3 4 5 11 12 13 14 15 16 17 18 20 19 8 7 9 10 thermal pad 6 nc en byp vin rt ovp iset comp ch5 ch4 gnd ch3 ch2 nc nc ss ch6 note: recommend connecting the thermal pad to the ground for excellent power dissipation. sw ovp ch1 ch2 ch3 ch4 ch5 ch6 iset ss in byp gnd en pwm 5v to 24v G5967 10 h comp rt 4.7 f 6.6 f 0.1 f 1 f
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