BD9478F Datasheet LED Drivers series for LCD Backlights PWM pulse Generator for LCD Panels BD9478F ●General Description BD9478F is PWM pulse generator for LCD panel.
This IC compares triangle waveform which is generated inside IC and external DC signal, and generates a PWM pulse.
This PWM pulse is provided to LED driver and controls LED grayscale.
PWM pulse frequency can be synchronized to external signal frequency inputted to SYNC terminal.
Even if this frequency gets out of range, it works in the setting frequency, is protected and it always provides stable PWM pulse to LED driver.
●Key Specification Operating power supply voltage range: 4.
5V to 5.
5V Free Run frequency: 150Hz (CT=0.
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