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

Method and apparatus for input charge control of a power supply

A technology of input voltage and input current, applied in the field of power supply, can solve problems such as wasting power

Inactive Publication Date: 2013-07-31
POWER INTEGRATIONS INC
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional approaches to measuring output current typically involve current-to-voltage conversion, which wastes power and uses expensive components to pass the signal across the isolation barrier

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
  • Method and apparatus for input charge control of a power supply
  • Method and apparatus for input charge control of a power supply
  • Method and apparatus for input charge control of a power supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] Methods and apparatus are disclosed for enabling a power supply to provide a galvanically isolated output having a regulated voltage region and a regulated current region. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that these specific details need not be employed to practice the present invention. In other instances, well-known materials or methods have not been described in detail to avoid obscuring the invention.

[0048] Throughout this specification, "one (one) embodiment" "one (a) embodiment" "an embodiment" or "an embodiment" means that specific features, structures, or Characteristics are included in at least one embodiment of the invention. Thus, appearances of the phrases "in one embodiment," "in an embodiment," "an example," or "an example" in various places throughout this specification are not necessarily...

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

An example controller includes a constant current control circuit and an integrator included in the constant current control circuit. The constant current control circuit is to be coupled to receive an input current sense signal, an input voltage sense signal, and an output voltage sense signal. The control circuit is adapted to regulate an output current of a power supply by generating a control signal to control switching of a switch. The integrator is coupled to integrate the input current sense signal during a switching period of the control signal to generate an integrated signal representative of a charge taken from an input voltage source of the power supply. The constant current control circuit is adapted to control the switching of the switch such that the integrated signal is proportional to a ratio of the output voltage sense signal to the input voltage sense signal.

Description

technical field [0001] The present invention relates generally to power supplies and, more particularly, to control circuits for regulating the output of a power supply by measuring the amount of charge received from the input of the power supply. Background technique [0002] In a typical switched-mode power supply application, an ac-dc power supply receives an input between 100 volts and 240 volts rms (root mean square) from a common ac outlet. Switches in the power supply are turned on and off by control circuitry to provide a regulated output, which may be suitable for running the electronics, or for charging a battery that powers the electronics. The regulated output is typically a dc voltage of less than 10 volts dc. Also, when the power supply is charging the battery, the current from the output is usually regulated. [0003] Safety agencies often require power supplies to provide galvanic isolation between the input and output. Galvanic isolation prevents dc curre...

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 & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M2001/0009H02M3/33523H02M1/0009
Inventor D·龚W·M·波利夫卡
Owner POWER INTEGRATIONS INC