BD9489F

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 1.2 Package(s) SOP16 W(Typ) x D(Typ) x H(Max) 10.00mm x 6.20mm x 1.71mm Pin pitch 1.27mm 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 Applications  TV, Computer Display, LCD Backlighting Figure 1. SOP16 1.3 Typical Application Circuit(s) VCC VIN Vout VCC REG58 STB RT SS CP PWM ADIM UVLO OVP GATE CS DIMOUT ISEN...