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Replace MAX13256

zhang ping
Genius 3835 points
Other Parts Discussed in Thread: UCC27524

I need a power scheme to replace max13256 to achieve 24V isolated voltage output, IOUT > 0.5A, input 24V, output 24V. Reference design is preferred.

  • 0
    TI__Guru 56650 points

    Ping,

    What application do you have? What switching frequency does the transformer operate? I cannot find a motor driver device to replace Max13256.

    1. The motor driver device's driving signal comes from a host controller to fit for all motor speed and winding current requirement. Max13256 driving signal can come from itself.

    2. Also, Max13256 internal circuitry guarantees a fixed 50% duty cycle to prevent DC current flow through the transformer, regardless of which clock source is used. A motor driver application doesn't have this situation and doesn't need to deal with the DC current flow through the transformer. If you pick a motor driver device, you have to guarantees a fixed 50% duty cycle at output.

  • 0 in reply to Wang5577
    Genius 3835 points

    Is there an isolated power supply scheme to help me realize the isolated output of 24V, VIN = 24V, Vout = 24V, IOUT > 0.5A

  • 0 in reply to zhang ping
    TI__Guru 56650 points

    Ping,

    Let me forward your question to the isolated power supply forum.

    e2e.ti.com/.../787429

  • 0 in reply to Wang5577
    TI__Genius 13445 points

    Hello Ping,

    Thanks for reaching out.

    You may consider UCC27524 for your isolated power supply to drive the transformer while keeping in mind the need for additional components (controller) to implement the oscillator, fault monitoring (comparator), and the overcurrent adjustment threshold input(sense resistor).

    Regards,

    -Mamadou