Power conversion circuit and conversion controller

A technology of power conversion circuit and conversion controller, which is applied in the direction of control/regulation system, emergency protection circuit device, output power conversion device, etc., and can solve the problem that the power conversion circuit cannot be protected, the protection function cannot be started in time, and protection loopholes, etc. question

Active Publication Date: 2012-10-31
GREEN SOLUTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unified start-up protection method will make other protection functions unable to start in time, resulting in protection loopholes, so that the power conversion circuit cannot fully protect the circuit

Method used

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  • Power conversion circuit and conversion controller
  • Power conversion circuit and conversion controller
  • Power conversion circuit and conversion controller

Examples

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Embodiment Construction

[0063] See figure 1 , is a schematic circuit diagram of a protection start control unit applied to a switching controller according to a first preferred embodiment of the present invention. The protection start control unit 100 includes a timing circuit, the timing circuit has a capacitor C, a charging circuit and a timing comparison circuit 110, wherein the charging circuit includes a first charging current source I1, a second charging current source I2 and a charging current Adjust switch SW. Timing comparison circuit 110 includes comparators 112 , 114 , and 116 . The non-inverting input terminals of the above three comparators 112, 114, 116 are coupled to the capacitor C, and the inverting terminals respectively receive the reference signals V1, V2, V3, wherein the level of the reference signal V1 is lower than the level of the reference signal V2 , and the level of the reference signal V2 is lower than the level of the reference signal V3. In addition, the protection st...

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Abstract

The invention discloses a power conversion circuit and a conversion controller. The conversion controller is used for controlling a conversion circuit to convert power of an input power supply. The controller comprises a working period control unit, a protection starting control unit and a protection unit. The working period control unit is used for controlling the conversion circuit to convert power according to a feedback signal. The protection starting control unit is used for outputting a plurality of protection starting signals according to timing results of a timing circuit. The protection unit is used for detecting the conversion circuit and generating a protection signal when judging that the conversion circuit is abnormal; and the working period control unit stops operation according to the protection signal, wherein the protection unit has a plurality of protection functions and starts the corresponding protection functions according to the plurality of the protection functions.

Description

technical field [0001] The invention relates to a power conversion circuit and a conversion controller, in particular to a power conversion circuit and a conversion controller with a protection starting function. Background technique [0002] Today's power conversion circuits can be mainly divided into two types: linear and switching power supplies. The linear power conversion circuit has a simple circuit, small ripple, and low electromagnetic interference. However, the electronic components are large, so the circuit is bulky and heavy, and the conversion efficiency is low. Although the circuit of the switching power conversion circuit is more complex, and the ripple is relatively large, and the electromagnetic interference is also relatively large, due to the advantages of high conversion efficiency and low power consumption at no-load, the current market for power conversion circuits is based on the switching power conversion circuit. circuit is mainstream. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02M1/36H02H7/10
CPCH02M1/32H02M3/156
Inventor 李立民余仲哲徐献松涂熙
Owner GREEN SOLUTION TECH CO LTD
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