BD9423EFV Datasheet – 6ch Boost LED Driver

BD9423EFV is a high efficiency driver for white LEDs and designed for large LCD panel. This IC is built-in high current drive and high responsibility type 6ch LED drivers and 1ch boost DCDC converter. BD9423EFV has some protect function against fault conditions, such as the over-voltage protection (OVP), LED OPEN and SHORT protection, the over current limit protection of DCDC (OCP).

Part Number: BD9423

Function: 6ch boost LED driver which constant setting can be shared by I2C control

Package: HTSSOP-B40 Pin type

Manufacturer: Rohm

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Description

The BD9423EFV is a 6-channel boost LED driver integrated circuit from Rohm Semiconductor, featuring a wide operating voltage range from 9.0V to 35.0V, a 200kHz oscillator frequency (with a 100kOhm resistor), and a typical operating current of 9mA; primarily designed for applications like LCD backlighting in TVs, computers, and notebooks, with key features including high current drive capability per channel, constant current accuracy, and various protection mechanisms against over-voltage, open LED detection, and short circuit conditions.

Features

1. Operating power supply voltage range:9.0V to 35.0V

2. Oscillator frequency: 200kHz (RT=100kΩ)

3. Operating Current: 9mA (typ.)

Pinout

Key Specifications

1. LED drivers Max curret 400mA per channel

2. Constant current accuracy ±1.8% (IC only)

3. Current analog (linear) dimming by ADIM pin

4. SHORT detection voltage is set by LSP pin

5. Error detection output by FAIL pin

6. Master/Slave mode inside

Applications

1. TV, Computer Display

2. Notebook, LCD Backlighting

BD9423EFV Datasheet

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