1. Difference:
-Controller with ripple: The output voltage contains a certain amplitude of AC ripple, which usually fluctuates at a frequency of 50Hz or 60Hz. This kind of controller usually adopts switching regulator or linear regulator.
-Ripple-free controller: The output voltage basically contains no AC ripple, and the voltage stability is good. This controller usually adopts switching regulator or DC-DC converter.
2. Example:
-There are ripple controllers: mobile phone charger, laptop charger, etc.
-ripple-free controller: medical equipment, precision instruments, etc.
It should be noted that the above examples are just some common examples. In fact, in the power supply circuit, ripple-free and ripple-free controllers have their own applicable scenarios, advantages and disadvantages, and need to be selected and applied according to specific conditions.