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 (PFC) function that is compatible with widely used wall dimmers. It uses Renesas' ISL6745A voltage mode PWM controller 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.


  • 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 Evaluation Board





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Disclaimer: THIS MATERIAL IS PROVIDED “AS-IS” FOR EVALUATION PURPOSES ONLY. RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (collectively, “Renesas”) DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY. Renesas provides evaluation platforms and design proposals to help our customers to develop products. However, factors beyond Renesas' control, including without limitation, component variations, temperature changes and PCB layout, could significantly affect the product performance. It is the user’s responsibility to verify the actual circuit performance.