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Double-series flyback circuit

A technology of flyback circuit and current detection circuit, applied in electrical components, only measuring current, adjusting electrical variables, etc., can solve the problem of low input voltage range, and achieve the effects of low cost, simple circuit structure, and convenient production and use.

Inactive Publication Date: 2017-10-24
郑州瑞能电源技术有限公司
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  • Abstract
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Problems solved by technology

The power voltage of the battery is relatively high, and only one MOS tube is generally used in the prior art, and the input voltage range, especially the upper limit, is still relatively low

Method used

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  • Double-series flyback circuit

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Embodiment Construction

[0014] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0015] Such as figure 1 As shown, the present invention provides a double series flyback circuit, including a first RCD absorption circuit 1, a first current detection circuit 2, a second RCD absorption circuit 3, a second current detection circuit 4, a MOS transistor Q8, and a MOS transistor Q9 and transformers. The first RCD absorption circuit 1 is connected in parallel with pin 1 and pin 2 of the transformer 1 / 2 winding, the source of the MOS transistor Q8 is connected to the first RCD absorption circuit 1, and the gate is respectively connected to the pulse control signal OGA and the first A current detection circuit 2, the drain is connected to the first circu...

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Abstract

The invention provides a double-series flyback circuit including a first RCD absorption circuit, a first current detection circuit, a second RCD absorption circuit, a second current detection circuit, a MOS transistor Q8, a MOS transistor Q9 and a transformer, the first RCD absorption circuit is connected in parallel to the pin 1 and pin 2 of the 1 / 2 winding of the transformer, the source electrode of the MOS transistor Q8 is connected with the first RCD absorption circuit, the grid electrode is connected with a pulse control signal OGA and the first current detection circuit, the drain electrode is connected with the first circuit detection circuit; and the first current detection circuit is connected with the second RCD absorption circuit and the pin 3 of the 1 / 2 winding of the transformer. The double-series flyback circuit effectively solves the voltage resistance problem of a MOS transistor, is low in cost, and is convenient to manufacture and use.

Description

technical field [0001] The invention relates to a protection circuit, in particular to a double series flyback circuit. Background technique [0002] Switching power supply is a kind of power supply that uses modern power electronic technology to control the time ratio of switching on and off to maintain a stable output voltage. Switching power supply is generally composed of pulse width modulation (PWM) control IC and MOSFET. With the development and innovation of power electronics technology, switching power supply technology is constantly innovating. At present, switching power supply is widely used in almost all electronic devices due to its small size, light weight and high efficiency. It is an indispensable power supply method for the rapid development of today's electronic information industry. The power voltage of the battery is relatively high, while only one MOS tube is generally used in the prior art, and the input voltage range, especially the upper limit, is st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/32G01R19/00
CPCH02M3/33569G01R19/0092H02M1/32
Inventor 陈大锋
Owner 郑州瑞能电源技术有限公司
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