48V to 12V 120W Half-Bridge Power Supply Evaluation Board for Telecom Applications


The ISL6745ALEVAL3Z is a low cost, high performance LED driver with power factor correction function, and is compatible with the widely used wall dimmers. It uses Intersil’s voltage mode PWM controller ISL6745A to operate a SEPIC converter in discontinuous conduction mode (DCM).

The ISL6745A is a low-cost double-ended voltage-mode PWM controller designed for half-bridge and full-bridge power supplies and line-regulated bus converters. It provides precise control of switching frequency, adjustable soft-start, and overcurrent shutdown.

The evaluation board design gives high flexibility on both the input side and output load. With the same circuit configuration, it works well with and without a triac dimmer.

Key Features

  • Input VAC: 50V ~140V
  • Typical Power Factor PF: 0.98
  • Typical Efficiency η: 80%
  • Output Current ILED: 10mA ~ 670mA
  • Output Voltage VOUT: 10V ~ 46V
  • Switching Frequency FS: 100kHz
  • Output Voltage Ripple VRPP: 50mV(P-P)


  • Half-bridge Converters
  • Full-bridge Converters
  • Line-regulated Bus Converters
  • AC/DC Power Supplies
  • Telecom, Datacom, and File Server Power

ISL6745ALEVAL3Z White LED Driver Eval Board

ISL6745ALEVAL3Z White LED Driver Eval Board

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