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BD9489F - White LED Driver

General Description

BD9489F is a high efficiency driver for white LEDs and is designed for large LCDs.

BD9489F has a boost DCDC converter that employs an array of LEDs as the light source.

Key Features

  • DCDC converter with current mode.
  • As PWM=L, the retaining function of Vout, FB voltage.
  • VOUT discharge function at shutdown.
  • LED protection circuit (Over boost protection, LED OCP protection).
  • Over-voltage protection (OVP) for the output voltage Vout.
  • Adjustable soft start.
  • Adjustable oscillation frequency of DCDC.
  • Wide range of analog dimming 0.2V to 3.0V.
  • UVLO detection for the input voltage of the power stage.

📥 Download Datasheet

Datasheet Details

Part number BD9489F
Manufacturer ROHM
File Size 0.97 MB
Description White LED Driver
Datasheet download datasheet BD9489F Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Datasheet LED Drivers for LCD Backlights 1ch Boost up type White LED Driver for large LCD BD9489F 1.1 General Description BD9489F is a high efficiency driver for white LEDs and is designed for large LCDs. BD9489F has a boost DCDC converter that employs an array of LEDs as the light source. BD9489F has some protect functions against fault conditions, such as over-voltage protection (OVP), over current limit protection of DCDC (OCP), LED OCP protection, and Over boost protection (FBMAX). Therefore it is available for the fail-safe design over a wide range output voltage. Key Specifications  Operating power supply voltage range: 9.0V to 35.0V  Oscillator frequency of DCDC: 150kHz (RT=100kΩ)  Operating Current: 2.6mA(Typ.)  Operating temperature range: -40°C to +85°C 1.