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The Method of Determining the Dead Time of Active Clamp Flyback Circuit

A flyback circuit, dead time technology, applied in electrical components, regulating electrical variables, output power conversion devices, etc., can solve problems such as reducing system efficiency and system loss

Active Publication Date: 2022-02-08
MERAKI INTEGRATED CIRCUIT (SHENZHEN) TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the preset dead time is simple to control, it will bring unnecessary loss to the system and reduce system efficiency

Method used

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  • The Method of Determining the Dead Time of Active Clamp Flyback Circuit
  • The Method of Determining the Dead Time of Active Clamp Flyback Circuit
  • The Method of Determining the Dead Time of Active Clamp Flyback Circuit

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Embodiment Construction

[0030] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0031] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art. The terms "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present application, unless otherwise sp...

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Abstract

The present application provides a method for determining the dead time of an active clamp flyback circuit, which relates to the technical field of electronic circuits. A voltage, detecting the magnitude of the first voltage, and determining the second dead time; the first voltage has a corresponding relationship with the voltage between the source terminal and the drain terminal of the first switching tube; after the second switching tube is turned off, the input Voltage, output voltage, turn ratio of primary winding and secondary winding, and oscillation cycle determine the first dead time. The present application can determine the optimal dead time to achieve the purpose of reducing system loss.

Description

technical field [0001] The present application relates to the technical field of electronic circuits, in particular to a method for determining the dead time of an active clamp flyback circuit. Background technique [0002] refer to figure 1 and figure 2 , in the prior art, an Active Clamp Flyback (ACF) circuit includes a transformer T1 for transferring power from a primary circuit to a load in a secondary circuit. The active clamp flyback circuit further includes: a first switching tube QL and a second switching tube QH, the first switching tube QL is turned on and off according to the first gate drive signal PMW1, and the second switching tube QH is controlled according to the second The gate drive signal PWM2 controls turn-on and turn-off. [0003] In order to prevent the first switching tube QL and the second switching tube QH from being directly connected, after the first switching tube QL is switched from on to off, before the second switching tube QH is turned on,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/38H02M1/088H02M3/335
CPCH02M1/38H02M1/088H02M1/083H02M3/33576
Inventor 熊新东伟曾祥才
Owner MERAKI INTEGRATED CIRCUIT (SHENZHEN) TECH LTD