A8512

A8512 LED Backlight Driver for LCD Monitors and Televisions FEATURES AND BENEFITS ▪ Six integrated high current sinks ▪ Fixed frequency current mode control with integrated gate driver ▪ 300 kHz to 1 MHz adjustable switching frequency ▪ Controlled startup using options of Enable, PWM signal, or battery voltage ramp ▪ Parallel operation with one boost controller (master) and up to five slave controllers ▪ Active current sharing between LED strings for ±0.6% accuracy and matching ▪ No audible MLCC noise during PWM dimming ▪ Adjustable overvoltage protection (OVP) ▪ Open or shorted LED string protection ▪ Overtemperature, cycle-by-cycle current limit, and undervoltage protection ▪ SOIC 24-pin package for easy single-side PCB manufacturing, or TSSOP 24-pin and QFN 28-contact packages with exposed thermal pad for better thermal performance PACKAGES: 24-pin SOICW with internally fused pins (LB package) 28-contact QFN with exposed thermal pad (ET Package) 24-pin TSSOP with exposed thermal pad (LP package) Not to scale DESCRIPTION The A8512 is a multi-output WLED/RGB driver for backlighting LCD monitors and televisions. It integrates a boost controller to drive external MOSFET, and six internal currentsinks. The boost converter operates in constant frequency (programmable) current mode control. PWM dimming allows LED currents to be controlled in 500:1 ratio. The LED sink current is set by an external R_ISET resistor (see chart below). More than one LED sinks can be combined toge...