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Auxiliary supply for a switched-mode power supply controller using bang-bang regulation

A switching mode power supply and controller technology, applied in the direction of control/regulation systems, instruments, electrical components, etc., can solve the problems of increasing the size and cost of SMPS systems

Active Publication Date: 2017-06-27
INFINEON TECH AUSTRIA AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of an external power supply has the disadvantage that it requires external circuitry, increasing the size and cost of the SMPS system

Method used

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  • Auxiliary supply for a switched-mode power supply controller using bang-bang regulation
  • Auxiliary supply for a switched-mode power supply controller using bang-bang regulation
  • Auxiliary supply for a switched-mode power supply controller using bang-bang regulation

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Embodiment Construction

[0019] Embodiments described herein are used to provide power to a controller of a switched mode power supply (SMPS) during startup of the SMPS and during its steady state operation. This does not require an external power source to accomplish. By appropriately configuring the existing circuitry of the SMPS, embodiments are able to provide power to the SMPS controller with minimal additional circuitry.

[0020] Various embodiments will be described in the following specification and related features. These embodiments provide specific examples for explanation, and are not intended to limit the present invention. Features and aspects from the exemplary embodiments may be combined or rearranged except where not permitted.

[0021] The present invention is aimed at embodiments of SMPS. SMPSs are generally known in the art. To avoid obscuring specific aspects of the invention, known aspects associated with the control of the SMPS, such as determining the frequency and duty cyc...

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PUM

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Abstract

A method in a switched-mode power supply (SMPS) and SMPS circuits are provided. The method and circuits use bang-bang regulation to provide for an auxiliary power supply that can be used to power a controller of the SMPS. The additional circuitry required to achieve the method and circuits is minimal and represents advantages over techniques that require an additional power supply or require an auxiliary winding in a transformer. The bang-bang regulation controls switch devices within the SMPS such that a normally-on switch device is enabled while a normally-off switch device is disabled for some period of time. During this period, current is supplied to the SMPS controller and an associated energy-storage device.

Description

technical field [0001] The present application relates to methods and circuits for providing electrical energy to a controller of a switched mode power supply (SMPS). The disclosed technique provides power to the SMPS controller using minimal additional circuitry inside or outside the SMPS. Background technique [0002] Switch Mode Power Supplies (SMPS) are widely used to provide electrical power to electronic equipment (loads) such as computers, televisions, lighting systems and other electronic devices. Like other power supplies, SMPSs convert electrical energy from the source into a form more suitable for the load. In a typical application, power is drawn from an alternating current (AC) mains voltage with a frequency of 50 Hz to 60 Hz and a root mean square (RMS) voltage level of 90V to 240V. The SMPS converts this power into low-voltage direct current (DC) power that is supplied to the load. [0003] SMPS have multiple advantages over other power supply types. SMPSs...

Claims

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Application Information

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IPC IPC(8): H02M7/217H02M3/335
CPCH02M3/33523H02M7/217H02M3/158H02M3/33507H02M1/0006
Inventor M·赫福特W·格拉尼格R·威斯
Owner INFINEON TECH AUSTRIA AG
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