A control circuit of power supply with capacitance load capability
A load capacity and control circuit technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of increasing the loss of short-circuit protection circuits and reducing the reliability of switching power supplies, achieving strong capacitive load capacity, low loss, Reliable effect
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[0023] Figure 1 shows a control circuit for a power supply with capacitive load capability, including a current detection circuit 21, a signal comparison circuit 22 and a short-circuit action circuit 23 connected in sequence; and a compensation signal delay circuit 11 and a signal comparison circuit 12.
[0024] The circuit described in Fig. 1 is described in detail below in conjunction with Fig. 2:
[0025] The VCC port provides a stable working voltage for the comparator, the COMP port is connected to the voltage compensation terminal of the pulse width modulation controller voltage feedback loop of the switching power supply, the ISENSE port is connected to the current sampling signal terminal of the switching power supply, and the CTL port is the protection signal output by the short circuit protection circuit , In the protection state, it is an inactive level, which can be used to drive a triode or a MOS tube to turn off the power supply of the switching power supply pulse...
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