Unlock instant, AI-driven research and patent intelligence for your innovation.

Drive circuit capable of setting current value

A technology for setting current and driving circuits, which is applied in the direction of conversion equipment without intermediate conversion to AC, and can solve the problems of large loss and high cost

Inactive Publication Date: 2011-09-07
马丽娟
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current source circuit is generally composed of a traditional boost circuit and a buck circuit. The current accuracy of this method is very good, but it has the disadvantages of large loss and high cost.

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
  • Drive circuit capable of setting current value
  • Drive circuit capable of setting current value
  • Drive circuit capable of setting current value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention is capable of various changes in different aspects without departing from the scope of the present invention, and that the description and drawings therein are illustrative in nature and not intended to limit the present invention.

[0037] see figure 2 , which is a schematic diagram of the circuit architecture of the first preferred embodiment of the present invention, such as figure 2 As shown, the drive circuit that can set the current value includes: the first diode D1, the first capacitor C1, the current sampling unit, the power switch unit M1, the current control unit, the pulse power supply Vin, the first group of loads, which are connected to The method is: the output terminal of the pulse power supply Vin is connected to the anode of the first dio...

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 aims to provide a drive circuit capable of setting a current value which can reduce loss and cost. In order to achieve the purpose, the invention provides that: a current control unit controls the ON / OFF time of a power switch unit M1 according to a feedback signal of a current sampling unit so as to control the rectification process of a first diode D1 so that the current value of a load is a set current value. Furthermore, the current control unit can receive an external control signal so as to realize functions of synchronization, turning on or off, current adjustment and the like.

Description

technical field [0001] The invention relates to a driving circuit of a single group of current-type loads or multiple groups of current-type loads, such as a driving circuit of a light-emitting diode L.E.D. and a charging circuit of a battery. Background technique [0002] In many applications, the classic regulated switching power supply is used for power supply. When it is necessary to drive voltage-type loads and current-type loads at the same time, on the basis of the classic regulated switching power supply, a current source circuit is added. Each current source circuit drives a group current load. A voltage-type load is a load whose working voltage is controlled at a set value, and a current-type load is a load whose working current is controlled at a set value. For example, in the existing light-emitting diode L.E.D. backlight TV, the motherboard needs to be powered by a controlled voltage, and the light-emitting diode L.E.D. backlight needs to be driven by a control...

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
IPC IPC(8): H02M3/10
Inventor 马丽娟
Owner 马丽娟