●General Description

BD9397EFV 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. BD9397EFV 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). Therefore BD9397EFV is available for the fail-safe design over a wide range output voltage.

●Features

■ 6ch Constant LED drivers, available 400mA drive per 1ch.

■ Constant current accuracy ±1.8 (IC only)

■ Each 6ch external PWM inputs can control independent dimming .

■ Current analog (linear) dimming by VREF

■ 1ch boost controller with current mode (external FET)

■ Several protection functions

DCDC part : OCP/OVP/UVLO/TSD

LED driver part :OPEN,SHORT detection

■ SHORT detection voltage is set by LSP terminal.

■ Error detection output FAIL terminal inside (normal=Open, error=Drain)

●Key Specification

? Operating power supply voltage range: 9.0V to 35.0V

? Oscillator frequency: 500kHz (RT=30k?)

? Operating Current: 9mA (typ.)

? Operating temperature range: -40°C to +85°C