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TL594: dispersion of output V

Part Number: TL594

Tool/software:

Hi all,

My customer uses a TL594 to control CCCV charging using the following forward circuit.

【The conditions】

Vin:350V

Vout:4V

Fsw:50kHz

The output voltage increased by about 6~60 mV. However, the measurement results varied from day to day. The deviation was sometimes 6mV.

Does the output voltage fluctuate by about 6~60 mV?

In the past, have there been any cases of variation due to aging?

Is it caused by external noise?

I would appreciate any advice.

Best Regards,

Ryusuke