Mixed switch power source converter and automatic switching control circuit
A switching power supply and hybrid technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of wrong change of working mode, instantaneous jump of current consumption, noise interference, etc., to prevent noise interference and strong anti-interference ability. , to achieve a simple effect
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[0024] Hereinafter, the present invention will be explained by taking a DC-DC converter with PWM and PFM working modes as an example.
[0025] figure 1 Shown is a block diagram of a DC-DC converter circuit. figure 1 In the converter, the automatic switching control circuit 1 is used to connect the PWM control unit 2, the PFM control unit 3, and the power switch drive unit 4. The reference voltage and reference current generating unit 6 is connected to the PWM control unit 2 and the PFM control unit 3; the PWM control unit 2 and the PFM control unit 3 are also connected to the power switch drive unit 4, the power switch and the output circuit 5, respectively. The power switch driving unit 4 is connected to the power switch and the output circuit 5 to adjust the output voltage of the converter.
[0026] The reference voltage and reference current generating unit 6 generates at least one reference voltage signal and at least one reference current signal; when the PWM control unit ...
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