Switching voltage regulator input voltage and current sensing

A technology of voltage regulator and input voltage, which is applied in the direction of adjusting electric variable, converting DC power input to DC power output, control/regulation system, etc.

Active Publication Date: 2016-10-26
INFINEON TECH AUSTRIA AG
View PDF8 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach requires both a high-side shunt resistor and an amplifier

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
  • Switching voltage regulator input voltage and current sensing
  • Switching voltage regulator input voltage and current sensing
  • Switching voltage regulator input voltage and current sensing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Embodiments described herein sense the input current of a voltage regulator by adding a low-ohmic high-side shunt resistor to the regulator's input power rail such that the voltage across the shunt resistor is proportional to the input current. Level shifting can be achieved by adding two high ohmic series resistors to each terminal of the shunt resistor and connecting the other terminals of the high ohmic series resistors to the two sense ( input) pin. The regulator controller forces current through a high ohmic series resistor such that the voltage across the controller sense (input) pin is dependent on the voltage across the shunt resistor, but is level shifted to no more than is allowed at the sense pin The lower voltage of the maximum voltage. The controller contains circuitry that senses (1) input voltage as a function of current through the two sense (input) pins and (2) as a function of voltage across the two sense (input) pins the input current.

[0020] fi...

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 disclosure relates to a switching voltage regulator input voltage and current sensing. A voltage regulator includes a power stage configured to produce an output voltage from an input voltage at an input voltage terminal, a shunt resistor connected in series between the input voltage terminal and the power stage, a first level shifting resistor connected in series between a first terminal of the shunt resistor and a first sense pin of the controller, and a second level shifting resistor connected in series between a second terminal of the shunt resistor and a second sense pin of the controller. The input current of the regulator is sensed as a function of the voltage across the shunt resistor, as shifted down by the level shifting resistors and measured across the sense pins. The input voltage of the regulator is sensed as a function of the current flowing through either one of the level shifting resistors, as measured at one of the sense pins.

Description

technical field [0001] The present application relates to switching voltage regulators, and more particularly, to sensing input voltage and current of switching voltage regulators. Background technique [0002] Switching voltage regulators generate an output voltage from an input voltage and use active components such as pulse width modulation controllers (PWMs), drivers, power MOSFETs, and components such as inductors, transformers, or coupled inductors, capacitors, and resistors. The passive component implementation of the class. Controllers typically measure output current and output voltage in order to regulate and monitor output voltage. Measuring input current and input voltage allows the controller to improve regulation and monitoring, as well as monitor input power for voltage, current, and power constraints. [0003] In some controllers, knowledge of the regulator input current and voltage is required for improved regulation algorithms and to monitor input power a...

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 & AuthorityApplications(China)
IPC IPC(8): H02M3/156H02M1/00
CPCH02M1/00H02M3/156H02M1/0009G05F3/262H02M3/158
InventorS·森B·唐D·奇尔哈特
OwnerINFINEON TECH AUSTRIA AG