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TL5001: TL5001 Isolated DC/DC issue

Intellectual 690 points

Replies: 2

Views: 808

Part Number: TL5001

I am working on a design that will use the TL5001. It is a DC-DC high Vout flyback converter(Isolated DC/DC).

Issue:

1.I use 100K resistance between RT & GND, System work oscillator frequency is 22K when on load is 3W, 100K at no-load. Why not always 100K.

2.I need control dead-time at 4.5us,Dead-time will be longer when input form 8V to 16V, Another situation is duty cycle goes to 0%, Now TL5001 not work or transformer saturation.

How can I solve this question?Please help ,Thanks!!!

2 Replies

  • Hi
    #1 Please check if any pulse skipping is happening at 3W load.
    #2 Please see Figure 17 in the datasheet. You have to add DTC resistor to control maximum duty cycle.
    EL
  • In reply to EricLee1880267:

    I will try your suggestion tomorrow, Thanks a lot!

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