Special output modes of switching power supplies Switching power supplies generally use constant voltage output mode, which is to keep the output voltage stable by sampling the output voltage and performing feedback control. However, in some special applications, other output modes are also required. 1. Constant voltage/constant current output mode: Suitable for battery chargers and special motor drivers, with two control loops: voltage control and current control. When the output current is small, the voltage loop works, which is equivalent to a constant voltage source; when the output current approaches or reaches the rated value, the current loop works, which is equivalent to a constant current source.
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