Device and method for dynamically controlling primary side feedback of reference voltage

A technology of reference voltage and primary feedback, applied in the control/regulation system, converting irreversible AC power input to DC power output, adjusting electrical variables, etc., can solve the problem of inability to save the cost, size and power consumption of power converter components Drive switching transistors, etc.

Active Publication Date: 2012-01-18
NANJING GREENCHIP SEMICON CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the pulse signal V generated according to the feedback signal PWM may not be able to drive the switching transistor 306
[0008] It can be seen from the above that the known method of implementing feedback control through an optocoupler and TL431 cannot save the component cost, volume and power consumption of the power converter
On the other hand, although the primary feedback control power converter proposed by the inventor of the present application can save component cost and power consumption, it cannot avoid the feedback signal being affected by the voltage oscillation phenomenon when the power converter is turned on

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for dynamically controlling primary side feedback of reference voltage
  • Device and method for dynamically controlling primary side feedback of reference voltage
  • Device and method for dynamically controlling primary side feedback of reference voltage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] Please refer to Figure 4 , Figure 4 It is a schematic diagram of a power converter 40 according to an embodiment of the present invention. The power converter 40 performs feedback control at the primary stage, and includes an input terminal 400 , an output terminal 402 , a transformer 404 , a switching transistor 406 and a feedback control device 408 . The power converter 40 receives an input voltage V through the input terminal 400 IN , and output an output voltage V through the output terminal 402 OUT . Transformer 304 includes a primary winding (Primary Winding) N P Coupled to the input terminal 400, an auxiliary winding (Auxiliary Winding) N A coupled to the primary winding N P , and a secondary winding (Secondary Winding) N S Coupled to the output terminal 402, it is used to convert the input voltage V IN Converted into energy stored in the primary winding N P , and the primary winding N P The stored energy is transferred to the secondary winding N S ,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a device and a method for dynamically controlling the primary side feedback of the reference voltage. The device for dynamically controlling the primary side feedback of the reference voltage comprises a control unit, a comparator, a sampling retaining unit and a reference voltage generator; the control unit is used for generating a pulse signal according to a feedback signal so as to control the on and the off of a switching transistor of a power convertor; the comparator is coupled with an auxiliary winding of the power convertor and is used for generating at least one control signal according to the voltage level and the reference voltage of the auxiliary winding; the sampling retaining unit is coupled with the auxiliary unit, the comparator and the control unit and is used for generating a feedback signal according to the at least one control signal outputted by the comparator; and the reference voltage generator is coupled with the control unit, the comparator and the sampling retaining unit and is used for generating the reference voltage used by the comparator according to the feedback signal.

Description

technical field [0001] The present invention relates to a primary feedback control device for a power converter capable of dynamically controlling a reference voltage and a related method, in particular to a primary feedback control device for generating a reference voltage according to a feedback signal of the power converter and its related methods. Background technique [0002] The main purpose of Switch Power Supply (SPS) is to convert the high-voltage, low-stability AC power supply provided by the power company into a low-voltage, stable DC power supply suitable for various electronic products. Widely used in computers, office automation equipment, industrial control equipment, communication equipment, etc. The architecture of the switching power supply includes various forms, such as flyback (Fly-back) converter, forward (Forward) converter and push-pull (Push-Pull) converter. [0003] Please refer to figure 1 , figure 1 It is a schematic diagram of a known power c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): H02M7/04G05F1/10
Inventor王燕晖林金延吴继浩洪家杰
OwnerNANJING GREENCHIP SEMICON CO LTD