CodePudding user response:

Put a few, 104, 103, 101 specifications of the capacitance

CodePudding user response:

Added, no effect,

CodePudding user response:

This is the load voltage or no-load voltage? Put a few small capacity of capacitance, capacitance range, also can try a series magnetic beads

CodePudding user response:

See HT7550 manual PSRR numerical, Vout jitter and the related parameters, on the right upstairs, you are the input and output and different specifications of the capacitance, 106, 104, 103, 101, and along with different filter frequency jamming signal, so the effect will be better,

CodePudding user response:

Thank you for your answer, finally decided to use DCDC buck,

CodePudding user response:

Ht7550 is not linear power supply switching power supply, do you have any impulse the clutter should be around source