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Flyback converter with secondary side regulation

A converter and flyback technology, applied in the direction of output power conversion device, regulation of electric variable, control/regulation system, etc.

Active Publication Date: 2017-02-15
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the SSR controller or secondary-side controller (SSC) needs to communicate with the primary-side controller (PSC) or gate driver across the isolation barrier, and typical SSR configurations require additional components to pass the analog or gate driver across the isolation barrier. Digital communication controls the primary side switch

Method used

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  • Flyback converter with secondary side regulation
  • Flyback converter with secondary side regulation
  • Flyback converter with secondary side regulation

Examples

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Embodiment Construction

[0014] In the drawings, like reference symbols refer to like elements throughout, and the various features are not necessarily drawn to scale. In the following discussion and claims, the terms "comprising", "having" or variations thereof are intended to be inclusive in a manner similar to the term "comprising", and thus should be construed to mean "including (but not limited to)" . Furthermore, the term "coupled" is intended to encompass an indirect or direct electrical connection or a combination thereof. For example, if a first device is coupled to or with a second device, that connection may be through a direct electrical connection or through an indirect electrical connection via one or more intervening devices and connections.

[0015] see first Figures 1 to 3 , figure 1 A flyback power converter or conversion system 100 is shown including a controller having a first control circuit (eg, primary side controller or PSC) 114 and a second control circuit (eg, secondary ...

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PUM

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Abstract

The invention relates to a flyback converter with secondary side regulation. Disclosed examples include flyback converters (100), control circuits (114, 130) and methods to facilitate secondary side regulation of the output voltage (VO). A primary side control circuit (114) operates a primary side switch (S1) to independently initiate power transfer cycles to deliver power to a transformer secondary winding (122) in a first mode. A secondary side control circuit (130) operates a synchronous rectifier or secondary side switch (S2) to generate a predetermined cycle start request signal via a transformer auxiliary winding (118) to assume secondary side regulation and to cause the primary side controller (114) to initiate new power transfer cycles.

Description

[0001] References to related applications [0002] Pursuant to 35 U.S.C. §119, this application asserts U.S. Serial No. 62 / 199,791, filed July 31, 2015, entitled SOFT SWITCHING FLYBACK CONVERTER WITH PRIMARYCONTROL Priority and Benefit of Provisional Patent Application, said US Provisional Application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to flyback converters and, more particularly, to secondary side regulation (SSR) for flyback converters. Background technique [0004] The DC-DC conversion is performed using a flyback converter to drive the output load using a transformer that isolates the input and output. An input rectifier circuit can be used for AC-DC applications. Turning on the primary side switch magnetizes the transformer primary winding and diverts power to the secondary circuit when the primary side switch is turned off. A diode can be connected to the secondary winding to allow c...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33561H02M3/33592H02M1/0054H02M3/33523Y02B70/10H02M1/0009
Inventor 萨迪什·库马尔·韦穆里詹姆斯·M·瓦尔登艾萨克·科昂
Owner TEXAS INSTR INC