External adjustable inductance demagnetization detection and power detection circuit
A technology of power detection circuit and discharge circuit, which is applied in the direction of measuring electric power, magnetic performance measurement, electric vehicles, etc., and can solve the problem of different rising rates of inductive current in switching power supplies
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[0024] An externally adjustable inductance demagnetization detection and power detection circuit, see figure 1 , 2 , including discharge circuit, power tube M0, inductance LAUX and voltage divider branch;
[0025] The VIN voltage is connected to the drain of the power tube M0 and the primary inductance L1 through the discharge circuit, and the VIN voltage is obtained from the AC mains after rectification and filtering; the gate of the power tube M0 is connected to the drive terminal of the switching power supply control chip (which is figure 1 Middle GATE terminal), the source of the power tube M0 is grounded through the resistor RCS, and connected to the current detection terminal of the switching power supply control chip;
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