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EMB1499Q - Explanation of Bidirectional Forward Converter

Keron Thomas
Prodigy 150 points

Hi, I'm currently doing a project on active battery management systems and I have been doing some reading on the EM1401 and EM1402 evaluation boards. In order to get a better understanding of these boards, I am reading the datasheets for the different components on these boards. While reading the datasheet for the EMB1499Q (bidirectional current dc/dc controller IC) I have come across a circuit diagram showing how the system is connected to the bidirectional forward converter. I am having a bit of difficulty understanding the operation of this converter. Can someone provide an explanation?

Regards,

Keron

Undergrad Student

  • 0
    Genius 5910 points

    I'm only cruising by:

    But if I look at the schematic:

    from left to right:

     inductor + fet is boost converter

    transformer in single ended forward converter

    and the capacitor + mosfet is active clamping to achieve higher efficiency.

    A forward converter isn't really suitable for changes in input/output voltage. To compensate for that there is the boost converter an other option is to use a flyback at cost of effenctie and size.

    The active clamping is to reduce the voltage at the transformer if the core is reset.

     Use LTspice to simulate. Start with the single ended forward to learn more about it.

  • 0 in reply to evs
    Prodigy 150 points
    Thanks a lot man, I will look into that.