Flexible Double Ended Voltage Mode PWM Controllers Evaluation Board


The ISL6740EVAL3Z serves as a reference design for a 48V to ±12V, 3.3V and 1.5V isolated power supply. It utilizes an ISL6740 double-ended voltage mode controller in half bridge topology to provide an isolated 48V to ±12V conversion. An ISL6402 dual PWM controller in synchronous buck topology provides the 3.3V and 1.5V outputs from the +12V rail. The reference design also provides pads to implement an optional LDO using the ISL6402 as a controller.

The ISL6740 adjustable frequency, low power, pulse width modulating (PWM) voltage mode controllers are designed for a wide range of power conversion applications using half-bridge, full bridge, and push-pull configurations. These controllers provide an extremely flexible oscillator that allows precise control of frequency, duty cycle, and deadtime.


The boards are designed to operate at the following conditions:

  • Input Voltage: 36V to 72V
  • Outputs:
    • 3.3V ±1% @ 4A
    • 1.5V ±1% @ 7A
    • 12V +3.5%/-10% (typical) @ 1.5A
    • -12V +3.5%/-10% (typical) @ 1.5A
  • Efficiency at full load: 86.8% (72V input) to 90.3% (36V input)


  • Telecom and Datacom Power
  • Wireless Base Station Power
  • File Server Power
  • Industrial Power Systems
  • DC Transformers and Buss Regulators

ISL6740EVAL3Z PWM Controller Evaluation Board Top

ISL6740EVAL3Z PWM Controller Evaluation Board Top

ISL6740EVAL3Z PWM Controller Evaluation Board Back

ISL6740EVAL3Z PWM Controller Evaluation Board Back





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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.