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Voltage transmission loss compensation circuit, compensation method, control chip and switching power supply

A switching power supply and loss compensation technology, applied in the fields of compensation methods, control chips, switching power supplies, and voltage transmission loss compensation circuits, can solve the problems of large size and high cost of compensation circuits, avoid large circuit losses, offset voltage losses, circuit simple structure

Active Publication Date: 2013-06-19
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a voltage transmission loss compensation circuit, a compensation method, a control chip and a switching power supply to overcome the problems of large volume and high cost of the compensation circuit caused by the use of capacitors in the prior art

Method used

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  • Voltage transmission loss compensation circuit, compensation method, control chip and switching power supply
  • Voltage transmission loss compensation circuit, compensation method, control chip and switching power supply
  • Voltage transmission loss compensation circuit, compensation method, control chip and switching power supply

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] Such as figure 2 As shown, it is a schematic structural diagram of a voltage transmission loss compensation circuit provided by an embodiment of the present invention; a voltage transmission loss compensation circuit of an embodiment of the present invention is applied to a flyback switching power supply, and the flyback in this embodiment The switching power supply is a constant voltage and constant current control mode, and the switching power supply...

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Abstract

The invention provides a voltage transmission loss compensation circuit, a voltage transmission loss compensation method, a control chip and a switching power supply. A first sampling signal for characterizing an output current is acquired by acquiring the output current information of the switching power supply, the first sampling signal is delayed and converted to acquire a compensation signal, and a control circuit adjusts an output voltage according to the compensation signal to compensate the voltage loss in the process of transmitting the output voltage of the switching power supply to a load, so that the voltage of the load is consistent with the expected voltage. The circuit is high in stability, large resistors and large capacitors are not required, circuit integration is facilitated, and the problems of high circuit loss and high cost are solved.

Description

technical field [0001] The invention relates to the field of switching power supplies, more specifically, to a voltage transmission loss compensation circuit, a compensation method, a control chip and a switching power supply. Background technique [0002] With the rapid development of the electronic information industry, switching power supplies are widely used in computers, electrical equipment, instruments, LED lighting, medical equipment, military equipment and other fields. Usually, a switching power supply converts an external alternating current (such as mains 220V, 380V, etc.) into a stable direct current to supply the load. [0003] see figure 1 , is a circuit structure diagram of a flyback switching power supply controlled by constant voltage and constant current, including a control circuit 101, a rectifier circuit 102, and a power stage circuit, wherein the control circuit 101 controls the on-off state of the main switching tube M1 in the power stage circuit, F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M1/00
CPCH02M3/33523H02M1/0025H02M3/33507H02M3/335H02M1/08H02M3/33515
Inventor 徐孝如韩云龙
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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