What do the pin diagram symbols vin, bst, sw, fb, en mean? 1. This is the control pin mark of the switching power supply chip: 1. en enable pin, generally a high level makes the chip work. 2. vin power input 3. bs self-boost pin, 4. sw switch control pin 5. Vin: Voltage input terminal before stabilization vout: Voltage output terminal after voltage stabilization gnd: Ground (common terminal) vin and gnd form a voltage input loop, vout and gnd form a voltage output loop. Extended information 1. Notes on connecting the physical diagram according to the circuit diagram: 1.
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