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Switching power supply system and self-powered device for switching power supply system

A switching power supply and system power supply technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problem of excessive static power consumption of the circuit, solve the problem of system restart, optimize the application environment, and realize the effect of self-power supply

Active Publication Date: 2022-07-15
WUXI CRYSTAL SOURCE MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a switching power supply system and an auxiliary supplementary self-power supply device for the switching power supply system, which can effectively solve the problem of system restart due to excessive consumption of VCC capacitor energy due to excessive static power consumption of the circuit, and optimize the switching power supply The application environment of the circuit realizes the self-power supply of the switching power supply in all states

Method used

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  • Switching power supply system and self-powered device for switching power supply system
  • Switching power supply system and self-powered device for switching power supply system
  • Switching power supply system and self-powered device for switching power supply system

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Effect test

Embodiment 1

[0028] Auxiliary supplementary self-supply device for switching power supply system

[0029] like figure 2 As shown, the high-voltage input power supply (high-voltage input terminal HV) is connected to the charging capacitor C1 through the excitation inductor L1, the power transistor NPN1, and the diode D1, the charging capacitor C1 is connected to the power supply terminal VCC of the switching power supply system, and the base of the power transistor NPN1 connected to the control unit, including:

[0030] a first switch S1, the first switch S1 is controlled on and off by the control unit, one end of the first switch S1 is connected to the base of the power transistor NPN1, and the other end is grounded;

[0031] The second switch S2, the second switch S2 is controlled by the control unit to be turned on and off, one end of the second switch S2 is connected to the emitter of the power transistor NPN1, and the other end is grounded;

[0032] a gap time detection module, the ...

Embodiment 2

[0060] Switching Power System

[0061] The switching power supply system includes the auxiliary power supply self-power supply device described in the first embodiment.

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Abstract

The invention relates to a switching power supply system and an auxiliary supplementary self-power supply device for the switching power supply system. The charging capacitor (C1) is connected to the power supply terminal (VCC) of the switching power supply system, and the base of the power transistor (NPN1) is connected to the control unit, including a first switch (S1), and the first switch (S1) is controlled by the The control unit controls on / off, the second switch (S2), the second switch (S2) is controlled by the control unit on / off, the gap time detection module, the gap time detection module is used to detect the two excitations of the switching power supply system The length of the gap time between stages, the control unit supplements the charging capacitor (C1) by controlling the on-off of the power transistor (NPN1), the first switch (S1), and the second switch (S2) according to the gap time . The present invention can effectively solve the problem of system restart caused by excessive consumption of VCC capacitor energy due to excessive static power consumption of the circuit.

Description

technical field [0001] The invention relates to a switching power supply system and a self-powered device for the switching power supply system. Background technique [0002] like figure 1 As shown, the existing switching power supply self-powered device includes a high voltage HV0, an excitation inductor L10, a start-up resistor R10, a power transistor Q10, a power NMOS transistor N10, a control chip, a charging diode D10, and a VCC capacitor C10. In the excitation stage of the switching power supply self-powered device, the control chip drives the power transistor Q10 and the power NMOS transistor N10 for excitation. When the excitation stage is near, the control chip stops driving the power transistor Q10 and the power MOS transistor N10. Due to the potential of the power transistor itself Due to the barrier recovery effect, the current in the excitation inductor L10 can quickly charge the VCC capacitor C10 through the power transistor Q10 and the charging diode D10. Whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08
CPCH02M1/08
Inventor 王必鹏郭斌
Owner WUXI CRYSTAL SOURCE MICROELECTRONICS CO LTD