Resonance switch driving controlling and protecting circuit

A protection circuit and switching drive technology, applied in the field of switching power supply control, can solve problems such as inability to meet requirements, inability to achieve rapid change and rapid shutdown, etc., to achieve stable and reliable performance, strong anti-interference ability, and a wide range of applications.

Inactive Publication Date: 2006-06-14
FUJIAN LONGKING
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  • Abstract
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AI Technical Summary

Problems solved by technology

This type of integrated chip uses a voltage-controlled oscillator (VC0) inside, and the change of the repeated working frequency is controlled by an external voltage, which cannot achieve rapid change and fast shutdown. The oscillation frequency of the voltage-controlled oscillator has a certain limited application range.
Moreover, when it is necessary to adjust the duty of the pulse to realize intermittent power supply applications, it cannot meet the requirements

Method used

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  • Resonance switch driving controlling and protecting circuit
  • Resonance switch driving controlling and protecting circuit
  • Resonance switch driving controlling and protecting circuit

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] exist figure 1 Among them, the present invention mainly includes repetitive pulse maximum frequency limiting circuit 1, dead time control circuit 2, Pmax time control circuit 3, Pmin time control circuit 4, logic combination circuit 5, double frequency division drive circuit 6 and other components. Among them, the PLUSE control pulse is provided by the main controller, F is the fault output signal of the power switch tube, and G1, G4, / G2, / G3 are the control drive pulses of the power switch tube. The connection relationship between them is: the PLUSE control pulse input repetitive pulse maximum frequency limiting circuit 1, the fault output signal F of the power switch tube is connected with the repetitive pulse maximum frequency limiting circuit 1, and the input of the dead time control circuit 2 is connected to the repetitive pulse ...

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Abstract

This invention discloses a drive control and protection circuit for a resonant switch including a maximum frequency limit circuit of repeated pulses, a dead zonetime control time control circuit, a Pmax time control circuit, a logic combination control circuit, a double frequency division driving circuit, in which, when a switch frequency is smaller than 1/2 resonance frequency, the resonance current works discontinuously, which relies on the over-zero signal of a serial resonant current to realize the shut-off of zero current and zero voltage of a switch tube.

Description

technical field [0001] The invention belongs to the field of switch power supply control and relates to a resonant switch control protection circuit. Background technique [0002] In the general switching power inverter control system (including resonant switches), you can choose a suitable integrated control chip as the circuit for forming the driving pulse of the switching device. This type of integrated chip uses a voltage-controlled oscillator (VC0) inside, and the change of the repeated working frequency is controlled by an external voltage, which cannot achieve rapid change and fast shutdown. The oscillation frequency of the voltage-controlled oscillator has a certain limited application range. Moreover, when it is necessary to adjust the duty of the pulse to realize intermittent power supply applications, it cannot meet the requirements. Contents of the invention [0003] The object of the present invention is to provide a resonant switch driving control and protec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
Inventor 郭俊陈冲颜玉崇邱江新陈颖谢小杰连金欣
Owner FUJIAN LONGKING
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