How to decrease ripple in switching power supply

[tom-39114320@163.com]

Hi guys:
    I`m working on Low-Cost Development of Digital DC Power Supply Using Waste Electric Bike Chargers, specs are below:
     1. designed based on Waste Electric Bike Chargers, pwm controller is UC3842, only changed it`s feedback loop.
     2. Output voltage:0~60V. ripple target:±100mV
     3. Current limit adjustable: 0~10A.
     4. USB typec control, SCPI compatible.
     5. WIFI/BLE connection.
     6. 2.8 TFT LCD display.
   basic function works well， but ripple is larger than I expected. can anyone give advice on how to improve?
   

[tom-39114320@163.com]

wiring diagram

[mtwieg]

basic function works well， but ripple is larger than I expected. can anyone give advice on how to improve?

What was the expected ripple? How much do you measure?

Ripple comes from the switching power circuitry, do you have a schematic of that?

[Peabody]

Dave has a video on this subject:

[MT4S301]

https://www.analog.com/media/en/technical-documentation/application-notes/an101f.pdf
https://www.we-online.com/components/media/o109022v410%20AppNotes_ANP009_LossFreeFiltered_EN.pdf
https://www.ti.com/lit/an/slyt837/slyt837.pdf
https://fscdn.rohm.com/en/products/databook/applinote/ic/power/suppression_method_of_switching_noise_an-e.pdf
https://www.analog.com/en/resources/technical-articles/designing-second-stage-output-filters-for-switching-power-supplies.html
https://www.analog.com/en/resources/analog-dialogue/articles/ferrite-beads-demystified.html