Monolithic Power Systems, Inc. LED Drivers MP4603EF-LF

The MP4603EF-LF is an integrated white LED driver designed for large LCD TV backlighting and high-power street LED lighting applications. It utilizes a novel power-leverage-control technology that allows it to drive LED strings with voltages up to 350V while maintaining high efficiency, with reported efficiencies of up to 99.5%. The device operates as a current-mode controlled buck-boost regulator, capable of delivering a regulated output voltage to drive up to 100 LEDs. Key features include a unique step-up/down operation, a dimming ratio exceeding 1:1000, and separate analog and PWM dimming capabilities. The MP4603EF-LF incorporates several protection mechanisms, including cycle-by-cycle over-current protection, thermal shutdown, and LED string open and short protection. It is packaged in a 16-pin SOIC format and is suitable for applications requiring high power density and efficiency. The recommended operating conditions include a supply voltage range of 5V to 80V, with a maximum junction temperature of 125°C.