G5968B Global Mixed-mode Technology Inc. 8-Channels LED Driver Features General Description The G5968B is an integrated power LED backlight driver that controls 8 channels of LED current for LCD backlight applications such as notebook computer and LCD monitor. The G5968B is a current mode boost converter integrated with 48V/2.5A power switch drivers the LED array. The G5968B’s 8 channels of voltage controlled current sinks with current matching within 1.5%, which compensate for the non-uniformity effect of forward voltage variance in the LED stacks. To minimize the voltage headroom and power loss in the typical multi-strings operation, the G5968B monitors the total highest LED forward voltage string and uses its feedback signal for output regulation. 8 Channels 4.2V to 24V Input Supply 48V Maximum Output Voltage Channel Full current Programmable up to 30mA Current Matching 1.5% Highest Vf String Detection for Regulation High Accuracy Digital Dimming by PWM Pin Automatic Connect/Disconnect LED 1MHz Switching Frequency Power sequence free for EN,PWM and VIN Protections: Open LED Protection (OLP) Over Current Protection (OCP) Over Voltage Lockout (OVP) Over Temperature Protection (OTP) TQFN4X4-24 & TSSOP-20 (FD) Package RoHS Compliant A SET pin is used for programming maximum LED current. A high contrast ratio true PWM dimming can be achieved by driving PWM pin with a PWM signal. LED current is proportional to the PWM pin duty. The G5968B features extensive protection functions that include OLP, OCP, OVP and OTP. It is available in a TQFN4X4-24 & TSSOP-20 (FD) package. Applications Notebook Display LED Backlighting LCD Monitor LED Backlighting LCD TV LED Backlighting Automotive Display Backlighting Ordering Information ORDER NUMBER PACKAGE (Green) MARKING TEMP. RANGE G5968BR51U 5968 -40°C to +85°C TQFN4X4-24 G5968BF21U G5968 -40°C to +85°C TSSOP-20 (FD) Note: R5: TQFN4X4-24 1: Bonding Code U:Tape & Reel F2: TSSOP-20 (FD) LX LX 19 20 NC COMP 22 21 VDC 24 23 IN Pin Configuration COMP 1 20 IN 2 19 LX VDC 3 18 PGND EN 4 GND 5 6 EN 1 18 PGND NC 2 17 PGND NC 3 16 OVP NC 4 15 CH1 GND 5 14 CH2 PWM CH8 PWM 6 13 CH3 11 CH4 12 SET 9 CH5 10 CH6 8 CH7 CH8 7 Thermal Pad LX 17 PGND 16 15 OVP CH1 7 14 CH2 CH7 CH6 8 13 CH3 9 12 CH4 CH5 10 11 SET Thermal Pad G5968B TSSOP-20 (FD) G5968B TQFN4X4-24 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Mar 14, 2011 1 G5968L Global Mixed-mode Technology 8-Channels LED Driver Features General Description 8 Channels 2.7V to 24V Input Supply 48V Maximum Output Voltage Channel Full current Programmable up to 30mA Current Matching 1.5% Highest Vf String Detection for Regulation High Accuracy Digital Dimming by PWM Pin Automatic Connect/Disconnect LED 1MHz Switching Frequency Power sequence free for EN,PWM and VIN Protections: Open LED Protection (OLP) Over Current Protection (OCP) Over Voltage Lockout (OVP) Over Temperature Protection (OTP) TQFN4X4-24 & TSSOP-20 (FD) Package RoHS Compliant The G5968L is an integrated power LED backlight driver that controls 8 channels of LED current for LCD backlight applications such as notebook computer and LCD monitor. The G5968L is a current mode boost converter integrated with 48V/2.5A power switch drivers the LED array. The G5968L’s 8 channels of voltage controlled current sinks with current matching within 1.5%, which compensate for the non-uniformity effect of forward voltage variance in the LED stacks. To minimize the voltage headroom and power loss in the typical multi-strings operation, the G5968L monitors the total highest LED forward voltage string and uses its feedback signal for output regulation. A SET pin is used for programming maximum LED current. A high contrast ratio true PWM dimming can be achieved by driving PWM pin with a PWM signal. LED current is proportional to the PWM pin duty. The G5968L features extensive protection functions that include OLP, OCP, OVP and OTP. It is available in a TQFN4X4-24 & TSSOP-20 (FD) package. Applications Notebook Display LED Backlighting LCD Monitor LED Backlighting LCD TV LED Backlighting Automotive Display Backlighting Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5968LR51U G5968LF21U 5968L 5968L -40°C to +85°C -40°C to +85°C TQFN4X4-24 TSSOP-20 (FD) Note: R5: TQFN4X4-24 1: Bonding Code U:Tape & Reel F2: TSSOP-20 (FD) LX LX 20 19 NC COMP 22 21 VDC 24 EN 23 IN Pin Configuration 1 18 PGND 1 20 IN 2 19 LX VDC 3 18 PGND NC 2 17 PGND EN 4 NC 3 16 OVP GND 5 NC 4 15 CH1 6 GND 5 PWM CH8 14 13 11 CH2 CH3 CH4 12 SET 9 CH5 10 CH6 7 CH8 8 6 CH7 PWM Thermal Pad LX COMP Thermal Pad 17 PGND 16 15 OVP CH1 CH2 7 14 CH7 CH6 8 13 CH3 9 12 CH4 CH5 10 11 SET G5968L TSSOP-20 (FD) G5968L TQFN4X4-24 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Aug 29, 2011 1