Switching power supply management IC FB, CS, DEM specific what role ah
PWM controller pulse width modulation controller power supply IC pin name
FB: Voltage feedback pin, the PWM duty cycle is determined by this pin voltage and CS
Pin voltage. And the operation mode is controlled by this pin voltage.
CS: Current sense pin (current sense, current sampling), connect to sense the MOSFET current.
DEM: Transformer core demagnetization detection and output over voltage protection pin (OVP) output overvoltage protection.
FB is the voltage feedback, CS is the current feedback, DEM do not know, it is best to send the chip, the different circuit function is not the same. Such as constant current output circuit FB is the current feedback!
