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Intelligent switch power source power detection and control device

A technology of intelligent switching and power supply, which is applied in the direction of power supply testing, power consumption devices, measuring devices, etc., can solve the problems of restricting the application of switching power supply, unable to achieve intelligent identification of power status and dynamic voltage control, etc.

Active Publication Date: 2008-08-13
GUANGDONG REAL DESIGN INTELLIGENT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary switching power supply cannot achieve intelligent identification of power state and dynamic voltage control, which restricts the application of switching power supply in audio power amplifier system

Method used

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  • Intelligent switch power source power detection and control device
  • Intelligent switch power source power detection and control device
  • Intelligent switch power source power detection and control device

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Embodiment

[0013] The structure schematic diagram of the present invention is shown in Fig. 1, 2, 3, 4, includes power detection circuit and power control circuit, wherein power detection circuit includes current sampling circuit 1, rectification filter circuit 2, voltage comparison circuit 3, time delay Circuit 4, hysteresis loop feedback circuit 5, the power control circuit includes a voltage sampling circuit 6, a reference voltage setting circuit 7, and a PWM controller 8, wherein the output terminal of the current sampling circuit 1 is connected to the rectification filter that converts the current signal into a voltage signal The input end of the circuit 2 is connected, the input end of the voltage comparison circuit 3 is connected with the output end of the rectification filter circuit 2 and is connected with the reference setting voltage in the power detection circuit respectively, the output end of the voltage comparison circuit 3 is connected with the delay circuit 4 The input en...

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Abstract

The invention discloses an intelligent switch power source power detection and control device, comprising a power detection circuit and a power control circuit, wherein the power detection circuit comprises a circuit sampling circuit (1), a rectifying filter circuit (2), a voltage comparison circuit (3), a time delay circuit (4), and a hysteresis feedback circuit (5). The power control circuit comprises a voltage sampling circuit (6), a reference voltage setting circuit (7), and a PWM controller (8). The invented power detection circuit inspects structure of output power by detecting switch power source main transformer primary current. When the output power is over-big, the power detection circuit generates a overpower signal by sampling the current, transforming the current signal to the voltage signal and comparing it with the preset reference voltage. The control circuit detects the overpower signal, varies voltage divider network of the control circuit by conducting a bipolar transistor, varies preset reference voltage for error comparison, decreases output duty ratio of control circuit width pulse modulation (PWM ) controller, decreases output voltage finally, so that the object of voltage self-control and system interior waste control are implemented.

Description

Technical field: [0001] The invention is a device for intelligent detection of the output power of a switching power supply and dynamic control of the output voltage, which belongs to the transformation technology of the power detection and control device of the switching power supply. Background technique: [0002] With the development of modern power electronics technology and the maturity of various control strategies, switching power supply technology is becoming more and more mature and reliable. Switching power supply gradually replaces power frequency power supply and is widely used in various electronic devices. Among them, the power supply used in the audio power amplifier system requires the output voltage to change dynamically with the load, with high system dynamic response performance, and when the power is output, the output voltage can be reduced to control the internal loss. Ordinary switching power supplies cannot achieve intelligent identification of power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/66G01R31/40G01R21/00G01R19/165
Inventor 汪军章国宝
Owner GUANGDONG REAL DESIGN INTELLIGENT TECH
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