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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

Active Publication Date: 2019-01-04
北京数字光芯集成电路设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current public technology, there is no effective detection method for the power loss of the power tube, so the effective automatic adjustment and optimization of the switch tube cannot be realized.

Method used

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  • Switching tube power loss and automatic adjusting circuit in switching power supply and working method
  • Switching tube power loss and automatic adjusting circuit in switching power supply and working method
  • Switching tube power loss and automatic adjusting circuit in switching power supply and working method

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Embodiment 1

[0047] Such as image 3 as shown, image 3It is a classic BUCK switch 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 generates a feedback voltage 18 after passing through the feedback network 15, and the PWM wave generator generates a PWM pulse signal 5 according to 18 and the reference voltage 17; An output voltage 6 is thus generated across the energy storage element 14 and the load.

[0048] Figure 4 In order to combine the BUCK switching power supply circuit of the circuit of the present invention, 20 represents the circuit of the present invention, and at the same time, this patent also needs to use the switch tube array 19 to replace 12 in the classic BUCK switching power supply circuit. Among them, the switching tube control bus 8 output by 20 will determine the number of switching tubes in working state in 19, assuming that the larger the val...

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Abstract

A switch transistor power loss and automatic adjusting circuit in switching power supply is characterize in that that circuit comprises a filter, a differential operational amplifier, a comparator anda sampling judger; One end of the input side of the differential operational amplifier is connected with the output end of the filter, and the other end is connected with the output voltage signal ofthe switching power supply; One end of the input side of the comparator is connected with the output end of the differential operational amplifier, and the other end is inputted with a threshold constant; The output end of the comparator is connected with the input end of the sampling decider. The invention realizes the effective detection of the loss of the power tube in the switching power supply and the automatic adjustment of the on-resistance of the power tube.

Description

technical field [0001] The invention relates to a switching tube power loss and automatic adjustment circuit and working method in a switching power supply. Background technique [0002] How to effectively detect the power loss of the switching tube in the switching power supply and automatically adjust and optimize it is the key to improving the efficiency of the switching power supply. The current disclosed technology lacks a method for effectively detecting the power loss of the power tube, thus failing to realize effective automatic adjustment and optimization of the switch tube. In view of this, this patent proposes a circuit that can realize the power loss detection and automatic adjustment of the switching tube in the switching power supply, which has the advantages of simple circuit structure, easy implementation and accurate detection. The application of this technology in switching power supplies can realize the optimization and improvement of conversion efficienc...

Claims

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Application Information

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IPC IPC(8): H02M1/00
CPCH02M1/00H02M1/0003H02M1/0048Y02B70/10
Inventor 阴亚东
Owner 北京数字光芯集成电路设计有限公司
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