STEVAL-ILL088V1

The STEVAL-ILL088V1 from STMicroelectronics is a 0.55A, positive buck-boost LED driver board based on LED6000. It is based on a monolithic current source for high power LED driving, the LED6000, a 61V asynchronous switching regulator. With embedded power MOSFET, it is designed to source up to 3A DC current depending on the application conditions. The 250mV typical RSENSE voltage drop, the VBIAS pin embedded switch-over feature and the light load management (pulse skipping) maximize power conversion efficiency across the entire load range. The current limit threshold and the switching frequency are adjustable for application optimization. The device also includes a 250KHz oscillator that can be externally adjusted up to 1.5MHz. The size of the overall application is minimized thanks to the high switching frequency and its compatibility with ceramic output capacitors. Two LED6000 regulators can be synchronized in a 180° out-of-phase configuration to reduce the total input RMS current.

• 24V to 60V input voltage
• Step-up and step-down conversion (up to 14 LEDs)
• 0.55A programmed LED current
• 500KHz switching frequency
• Digital dimming is implemented by driving the dedicated DIM pin
• Auto-recovery overcurrent and thermal protection

Applications

Lighting