G5968C 台湾致新代理商 GMT DC-DC系列 LED背光驱动器

Part Number	Vin (V)min.	Vin (V) max.	LED CH	VO_MAX(V)	ISW(A)	FSW(k Hz)	VLED FB (V)	Note	Package
G5968C	4.2	24	8	48.0	3	1000	0.6	EN, SS, OCP, OVP, OTP, OLP, 30mA/CH, PWM Dimming 200~20k Hz	TQFN4X4-24

8-Channels LED Driver

General Description
The G5968C 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 driv-ers the LED array. The G5968B’s 8 channels of volt-age 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 moni-tors 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 G5968B features extensive protection functions that include OLP, OCP, OVP and OTP. It is available in a TQFN4X4-24 & TSSOP-20 (FD) package.

Features
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