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Low-cost redundant power source control circuit

A technology of power supply control circuit and redundant power supply, which is applied in the field of power supply, can solve the problems of serious loss, large circuit board size, unbalanced input voltage and output voltage, etc., achieve small conduction internal resistance, avoid backfeeding, and pressure drop small effect

Inactive Publication Date: 2018-11-16
深圳市世联盈丰科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] In the existing power conversion technology design, the input voltage and output voltage are often unbalanced, and the power conversion design is complicated, the circuit board is large, and the loss is serious

Method used

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  • Low-cost redundant power source control circuit

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Embodiment

[0017] Such as figure 1 As shown, the working principle of the present invention is as follows:

[0018] In the present invention, the dedicated control power chip U10 is used as the main control device of the combining circuit. By detecting the voltage difference between the two ends of the NMOS tube, once the NMOS VDS reaches the turn-on threshold, the dedicated control power chip U10 will start to work and generate a gate opening Voltage, quickly turn on the NMOS tube. In turn, the path between the output and the input is turned on. When the NMOS tube is completely turned on, thanks to the advantage of the small internal resistance of the NMOS tube, the voltage difference between the input and output of the entire circuit is extremely small, which avoids undervoltage protection in the subsequent circuit and improves the voltage conversion efficiency. , The conversion efficiency loss is almost negligible. The dual-channel NMOS tube design not only avoids dual-channel power su...

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Abstract

The present invention discloses a low-cost redundant power source control circuit. The low-cost redundant power source control circuit comprises two power conversion circuits, each power conversion circuit comprises one power input end, one filter circuit, one field-effect tube and one power control circuit. The power input ends obtain a smooth voltage through the filter circuits, are connected with the sources of the field-effect tubes and the control ends of the power control circuits and detect the voltage difference of the sources and the drains of the field-effect tubes at the power control circuits, when the field-effect tubes reach a conduction critical point, the power control circuits send control signals to allow the field-effect tubes to perform rapid conduction, the power control circuits and the field-effect tubes output the voltages at the input ends, and the output voltages of the power conversion circuits are mutually mixed. The low-cost redundant power source control circuit is simple in design, low production cost, high in voltage conversion rate and low in power loss, and has wide production and application values in the power technical field.

Description

Technical field [0001] The present invention relates to the field of power supply technology, in particular to a low-cost redundant power supply control circuit. Background technique [0002] In the existing power conversion technology design, the input voltage and the output voltage are often unbalanced, and the power conversion design is complicated, the circuit board is large, and the loss is serious. Summary of the invention [0003] In view of the above-mentioned defects, the present invention provides a redundant power control circuit with simple design, low production cost, high voltage conversion rate and low loss. [0004] The technical scheme of the present invention is as follows: a low-cost redundant power supply control circuit, including two power conversion circuits; each of the power conversion circuits includes a power input, a filter circuit, a field effect tube, and a power control circuit; the power supply After the smoothed voltage is obtained by the filter cir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00
CPCH02M1/00
Inventor 孙有星许溢海
Owner 深圳市世联盈丰科技有限公司
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