STEVAL-ILL089V1 LED Driver Board

STMicroelectronics' 1 A buck LED driver evaluation board is based on the ALED6000 monolithic current source for high-power LED driving, featuring a dedicated DIM pin for dedicated dimming control and low drop-out operation across an almost 100% duty cycle.

The ALED6000 is a 61 V asynchronous switching regulator with embedded power MOSFET designed to source up to 3 A_DC current, depending on the application requirements. The 250 mV typical R_SENSE voltage drop, the embedded switchover feature on the V_BIAS pin, and the light load management (pulse skipping) all contribute to maximizing power conversion efficiency across the entire load range.

The current limit threshold and the switching frequency are adjustable, as well as the internal 250 kHz oscillator, which can be externally adjusted up to 1.5 MHz. The high switching frequency and compatibility with ceramic output capacitors allow very compact application designs. Two LED6000 regulators can be synchronized in a 180° out-of-phase configuration for reduced total input RMS current.