Switching mode voltage-regulated device with energy-saving circuit and energy-saving control method

A switching, energy-saving technology, applied in control/regulating systems, regulating electrical variables, instruments, etc., can solve the problems of switching voltage regulators such as audio noise

Inactive Publication Date: 2007-02-28
SYST GEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the switching frequency F S This switching regulator may produce audible noise when dropped and falls into the audio band

Method used

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  • Switching mode voltage-regulated device with energy-saving circuit and energy-saving control method
  • Switching mode voltage-regulated device with energy-saving circuit and energy-saving control method
  • Switching mode voltage-regulated device with energy-saving circuit and energy-saving control method

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Experimental program
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Embodiment Construction

[0015] Referring to FIG. 2 , it is a schematic diagram of the control unit 10 of the switching regulator of the present invention. A bias unit 60 generates a first reference voltage V REF1 , a second reference voltage V REF2 with bias current I 0 ··I N ··. 1, a feedback unit 80 is coupled to an output terminal V of the switching regulator through a coupler 50 O , to receive an output signal V FB , and output a feedback signal V according to the output load condition B . A first control unit 90 receives the second reference voltage V REF2 with the feedback signal V B , used to output an oscillation signal PLS, a sawtooth signal V SAW , an energy-saving signal V G with an auxiliary control signal V S2 . A second control unit 70 is based on the feedback signal V B , the sawtooth signal V SAW , the auxiliary control signal V S2 , the energy-saving signal V G and the oscillating signal PLS to output a switching signal S W1 with an auxiliary switching signal S W2 ,...

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Abstract

The invention relates to a switching stabilizer for saving electricity, to improve the system efficiency at light load, wherein the first controller, based on the change of feedback signal, outputs one oscillating signal and one energy-saving signal; the second controller receives said oscillating signal and feedback signal, to output switching signal to control switch; the stop time of switching signal will increased along the decrease of load; when the switching signal is stopped, the energy-saving signal can stop the switch, and close not needed circuit in the stabilizer, to save energy.

Description

technical field [0001] The invention relates to an energy-saving switching voltage regulator, a power supply and a power converter. Background technique [0002] Switching regulators use control switching signals to provide adjustable output voltage and current. Based on the demand for energy saving, the power utilization rate in electronic products must comply with power management and energy saving specifications. [0003] Please refer to Figure 1, which is a schematic diagram of an existing switching regulator, a switching switch Q 1 is an input terminal V coupled to the switching regulator IN . Through a magnetic component T 1 , the toggle switch Q 1 transmits power to an output terminal V of the switching regulator O . An auxiliary switch Q 2 is used to provide synchronous rectification or half-bridge circuit architecture, the auxiliary switching switch Q 2 is selectable as enabled or disabled. A coupler (coupler) 50 is coupled to the output terminal V of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56G05F1/565
Inventor 杨大勇
Owner SYST GEN
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