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UCD3138A: UCD3138: single frame trigger?

A.R.f.
Intellectual 590 points
Part Number: UCD3138A
Other Parts Discussed in Thread: UCD3138

Dear TI,

I'm designing a specialized power supply for an electric motor, and except for typical buck-boost operation I will also need to generate individual short pulses. I've found that UCD3138 provides a "single frame mode", and it seems to be what I need. However, it is barely mentioned in the Programmers Manual.

Could you, please, provide some more information about this mode?
In particular, I need to know how "Single Frame Trigger" can be generated.

Best regards,
Adam

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    TI__Expert 7310 points
    An expert will help you soon.
  • 0 in reply to Bosheng Sun
    Intellectual 590 points

    Hello,
    I have already found that the trigger is generated by toggling PWM_EN.
    I am still having problems with setting length of the pulse. I thought that it will work exactly the same as for continuous operation, but I'm only getting some weird results. Also, the pulses seem not to be inverted, although I had set that and that's how they are in continuous mode.
    I have asked a new question with some examples:
    https://e2e.ti.com/support/power_management/digital_power/f/184/t/700021
    Best regards,
    Adam