High reliability 3.5W DC-DC converter delivers 5, 3.3 and 1.8V
It implements a non-isolated discontinuous control mode (DCM) Flyback topology with triple output. It will typically be used as a Point-of-Load generating locally three standard voltages from a single power supply bus that can range from +12V to +28V. The output voltage of the evaluation kit are +5V; +3.3V and +1.8V. The reference design can be modified to accommodate different voltage needs. Default switching frequency is set to 100kHz and can be modified up to 500kHz. The Flyback regulation loop is set on the +5V output. Depending on the load conditions and on the regulation requirements of the application, the design can support two additional built-in linear regulators that generate the two lowest voltages.
Fuji is offered in the form of an evaluation kit that includes a compact demonstration board, a complete application note with the electrical schematic and bill of materials. All the components are rated -55°C to +225°C. The transformer is a custom-made toroid model built from a standard high temperature core. Cissoid is working with IPDIA to offer as an optimized solution with the company’s high-temperature silicon capacitors suitable for 250°C operation.
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