Switching tube power loss and automatic adjusting circuit in switching power supply and working method
A switching power supply and automatic adjustment technology, applied in the direction of high-efficiency power electronic conversion, output power conversion devices, electrical components, etc., can solve the problems of failing to achieve effective automatic adjustment and optimization of switching tubes, and lack of effective detection of power loss of power tubes, etc. To achieve the effect of effective detection and accurate detection
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[0046] Example 1:
[0047] Such as image 3 As shown, image 3 It is a classic BUCK type switching circuit, including a switch tube 12, a PWM wave generator 13, an energy storage element 14 and a feedback network 15. The output voltage 6 of the switching power supply passes through the feedback network 15 to generate a feedback voltage 18. The PWM wave generator generates a PWM pulse signal 5 according to 18 and the reference voltage 17; 5 controls the opening and closing of the switching tube 12, thereby intermittently loading the power supply voltage 16 The output voltage 6 is thus generated on the energy storage element 14 and the load.
[0048] Figure 4 In order to combine the BUCK-type switching power supply circuit of the circuit of the present invention, 20 represents the circuit of the present invention. At the same time, this patent also needs to use a switch tube array 19 instead of 12 in the classic BUCK-type switching power supply circuit. Among them, the switching t...
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