TL5001A: TL5001A compensation network

Joël K. Bertrand

Part Number: TL5001A

Hello Youhao, I come back with some new results.

In a first time, I have tested values you have given for compensation network. I have tried with and without Q36. Q36 doesn't affect stability but is required to obtain a clean 5V power supply.

Without load, I think it runs better, but with a load (47 kR / 406 V = 8.5 mA), system shows oscillations and inrush current can be greater than 3A ! Main page

Best regards,

over 4 years ago

0 Youhao Xi over 4 years ago

TI__Guru* 78510 points

Hi JB,

Thank you for the posting and for testing our proposals. This may take some more time for us to find out a solution. I will get back to you by COB tomorrow.

Thanks,

Youhao

0 Joël K. Bertrand over 4 years ago in reply to Youhao Xi

Intellectual 450 points

Thanks a lot.

I'm trying to find another transformer. The first one I have installed in this circuit was a Wuerth Elektronik (760895631). Q23 and Q24 were destroyed as inductance of this first transformer was too high (500 µH if I remember). The second one is a hand made transformer (with a TDK toric core) and I think that saturation current is less than expected.

Best regards,

0 Youhao Xi over 4 years ago in reply to Joël K. Bertrand

TI__Guru* 78510 points

Hi JB,

Thank you for the info. If you have new test results this the TDK transformer, please kindly share.

Best Regards,

Youhao

0 Joël K. Bertrand over 4 years ago in reply to Youhao Xi

Intellectual 450 points

Hi Youhao,

I think I will add a shunt to measure inrush current in transformer as soon as possible.

Best regards,

0 Youhao Xi over 4 years ago in reply to Joël K. Bertrand

TI__Guru* 78510 points

Thank you JB. Please keep us posted.

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TL5001A: TL5001A compensation network