OZ9986A Phase-Shift, 6 String High Power LED Controller
功能特点
LED Backlight Controller ICs for TV APPLICATIONS
OZ9986A are high efficiency, DC/DC controllers that drive up to six (6) strings connected in parallel configuration, with multiple LEDs in each string connected in series. Each is targeted for large-size monitor and TV applications.
Each IC provides six (6) LED current sense inputs in an “OR” configuration to improve backlight reliability. This allows the backlight to remain functioning in the event that any string (s) is damaged during normal operation.
OZ9986A support internal Pulse Width Modulation (PWM) dimming control,where the PWM dimming signal is phase-shifted by 60 degrees per channel when all 6 channels are connected. This proprietary feature significantly enhances the system performance.
参数指标
• OZ9986A: Buck converter
• High efficiency DC/DC converter controller for LEDs
• Drives up to 6 strings in parallel; number of LEDs in series limited by external MOSFET(s) rating
• High efficiency LED current balance function
• User-selectable, phase-shift PWM dimming function with 3, 4, 5 and 6 phases
• PWM dimming control signals synchronized with external signal