Test conditions: Input 6V, output 3.6V, with a load current of 15mA
Result: The input voltage fluctuates; Under no-load conditions, the input voltage is stable
Could you please help determine the reason? Looking forward to your reply. Thank you
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Test conditions: Input 6V, output 3.6V, with a load current of 15mA
Result: The input voltage fluctuates; Under no-load conditions, the input voltage is stable
Could you please help determine the reason? Looking forward to your reply. Thank you
Hello Colin,
Thank you for reaching out,
Can you please provide me your measurement setup?
I would recommend to measure across the input capacitor using tip and barrel method.
How to measure ripple for better design outcomes (ti.com)
This might be also due to electrolytic capacitors which has high ESR.
Thank you & regards,
Moheddin.
Hi Moheddin,
Thank you for your reply.
I haven't received any feedback from the customer yet. After communicating with them earlier, I suspected that it was due to insufficient driving capacity of the customer's previous 6V power supply output. The customer's previous 6V voltage came from four 1.5V alkaline batteries. I have suggested that the customer use a DC power supply for testing, but I haven't received any feedback yet
Hello Colin,
If you don't have any further questions, can you please close the thread by clicking on Resolved.
Thank you & regards,
Moheddin.