A control method and circuit of a switching power supply
A technology of switching power supply and control method, applied in the direction of control/regulation system, high-efficiency power electronic conversion, electrical components, etc., can solve the problems of changing operating frequency and low efficiency of switching power supply, and achieve the effect of improving efficiency
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[0038] Next, the technical scheme in the present application embodiment will be described in the present application embodiment, and it is understood that the described embodiments are merely the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained without creative labor are not made in the pre-creative labor premises.
[0039] The present application example provides a control method of a switching power source, which is applied to a BUCK (ie, a buck conversion circuit) controlled by COT (constant on time, constant on time), such as figure 2 As shown, the method includes the following steps:
[0040] Step S101, the load voltage is acquired, and the matching voltage range that matches the load voltage is determined from the plurality of preset voltage ranges.
[0041] In this embodiment, the load voltage can be acquired or in the prior art, and the load voltage is compared with the p...
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