OB3362F

On-Bright Confidential to IVT OB3362F 4 Channels High Performance LED Driver GENERAL DESCRIPTION The OB3362F is a highly integrated and high performance LED driver that optimized for LCD backlight application. It integrates a boost driver and 4 channels of current balancer that optimized to drives multi LED arrays, and thus provides a high performance LED backlight solution with minimized BOM count. The OB3362F contains a PWM boost driver which uses current mode control and fixed frequency operation. The operation frequency can be programmed by setting external resistor value at RI pin. The OB3362F integrates 4 channels current balancer with up to 200mA current capability per channel and it can achieve 3% matching accuracy among LED strings. The minimum voltage of current source is regulated to as lower as 350mV, which benefits the efficiency and improves the IC thermal performance. The OB3362F supports external PWM dimming and internal burst dimming mode which allow flexible control of the backlight luminance. The LED current is directly modulated by external PWM duty cycle when PWM dimming mode is selected. The LED current can be adjusted by an external DC voltage when internal burst dimming mode is selected. TYPICAL APPLICATION FEATURES „ 10V gate drive, better MOS compatibility „ High Efficiency and Compact Size „ 6V to 30V Input Voltage Range „ 3% Matching Accuracy Between 4 LED Strings Control Current „ 100KHz~600KHz Operating Frequency „ Internal/External PWM Dimmin...