Switch control circuit
A switch control circuit and control chip technology, which is applied in the direction of electrical components, output power conversion devices, etc., can solve the problem of fast opening and closing speeds of IGSFETs, electromagnetic interference, and voltage spikes at the closing speed of IGSFETs And other issues
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[0029] Below in conjunction with accompanying drawing and preferred embodiment the present invention is described in further detail:
[0030] Please refer to figure 1 , the switching control circuit 100 of the present invention is connected between a control chip 200 and a switching transformer T, and the switching transformer T is also connected to an output circuit 300 . The switch control circuit 100 is used to control whether the voltage of a power supply VCC is transformed by the switching transformer T and then output to the back-end components (not shown) through the output circuit 300 .
[0031] The switch control circuit 100 includes an IGSFET Q1, a PNP transistor Q2, a first diode D1, a second diode D2, resistors R1-R3, and capacitors C1-C2. In this implementation manner, the IGSFET Q1 is an N-type IGSFET.
[0032] The anode of the first diode D1 is connected to the control chip 200 through the resistor R1, and is also connected to the base of the PNP transistor Q2...
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