BD9397EFV

Datasheet LED Drivers for LCD Backlights White LED Driver for large LCD panel BD9397EFV ●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. ●Key Specification  Operating power supply voltage range: 9.0V to 35.0V  Oscillator frequency: 500kHz (RT=30kΩ)  Operating Current: 9mA (typ.)  Operating temperature range: -40°C to +85°C ●Applications TV, Computer Display, Notebook, LCD Backlighting ●Typical Application Circuit Vin Cin VCC VCC STB CVCC FAIL_MODE FAIL_RST RT SS REG9V UVLO VREG UVLO (VCC) UVLO TSD OVP SCP OSC SS PROTECTION Logic PWM COMP ++ - Control Logic Filter REG9V Current Sense DRIVER REG9V OVP FAIL CP N PGND CS FB RFB CFB LED_LV REG9V LSP ERR AMP ---- + OPEN/SHORT Detect M_DET LED1 + - S1 VREF PWM１ 1/5 + - PWM6 AGND AGND LED6 + - S6 N.C. Figure 1. Typical Application Circuit +Cout ●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...