Frequency hopping control circuit of offline single-side voltage stability control system

Abstract

The invention discloses a frequency hopping control circuit of an offline single-side voltage stability control system. The frequency hopping control circuit comprises an external feedback voltage-dividing circuit, a reference voltage circuit, a voltage comparator, a latch, a frequency hopping controller and a driving circuit, wherein the input end of the external feedback voltage-dividing circuitis connected to an external feedback voltage; the output end of the external feedback voltage-dividing circuit and the output end of the reference voltage circuit are connected to the input end of the voltage comparator; the output end of the voltage comparator is connected to the signal input end of the latch; the output end of the latch is connected to the enable end of the frequency hopping controller; the input end of the frequency hopping controller is connected to a delay signal; the output end of the frequency hopping controller is connected to the input end of the driving circuit; andthe driving circuit is configured to drive an external switching tube. The frequency hopping control circuit uses a partial linear frequency reduction and frequency hopping frequency conversion mode,has a working frequency skipping the hearing range of most human ears, minimizes noise pollution, raises the lowest frequency by an order of magnitude under the condition of ensuring a light load requirement, and basically eliminates the voltage output drop from the light load to full load.

Description

technical field [0001] The invention relates to a battery charger system, in particular to a frequency-hopping control circuit of an off-line unilateral voltage stabilization control system. Background technique [0002] With the widespread use of various portable devices and the higher and higher requirements for environmental protection, rechargeable portable energy sources such as lithium batteries are becoming more and more important in people's daily life, and the corresponding charging devices are also becoming more and more important. more and more important. In the SMPS (Switching Mode Power supply) system, the battery charger system belongs to a very important category in the AC-DC system. [0003] For the battery charger system, the voltage output control capability of the system is an extremely important indicator. [0004] The offline unilateral voltage regulation control system is a battery charger control circuit specially developed for the battery charging s...

AI Technical Summary

Problems solved by technology

[0015] Purpose of the invention: In order to solve the problem of large noise pollution in the existing off-line unilateral voltage stabilization control system, the present invention provides a frequency hopping control circuit of the off-line unilateral voltage stabilization control system

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