ROHMBD9488F-GE2BD9488F-GE2 LED Driver IC

BD9488F is a high efficiency driver for white LEDs and designed for large LCDs. This IC is built-in a boostDCDC converters that employ an array of LEDs as the light source. BD9488F has some protect function against fault conditions, such as the over-voltage protection(OVP), the over current limit protection of DCDC (OCP),LED over current protection (LEDOCP), the open detection of LED string. Therefore BD9488F is available for the fail-safe design over a wide range output voltage.

Current mode DCDC converter

Vout discharge circuit as shutdown

LED protection circuit (OPEN protection, LED OCP protection)

LED protect detection as small PWM dimming signal

Over-voltage protection (OVP) for the output voltage.

Adjustable soft start time constant

The wide range of analog dimming 0.2V-3.5V

The built-in transformation circuit from pulse to DC

2 PWM dimming signal

The UVLO detection for the input voltage of the power stage

FAIL logic output