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Switch circuit of power transducer with voltage wave eliminator for improving efficiency

A technology for power converters and switching circuits, which is applied in the direction of converting irreversible DC power input into AC power output, AC power input into DC power output, and output power conversion devices, etc., which can solve the problem that high-resistance resistors are not suitable Create integrated circuits and other issues

Inactive Publication Date: 2010-05-12
SYST GEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such high resistance resistors are not suitable for creating in integrated circuits

Method used

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  • Switch circuit of power transducer with voltage wave eliminator for improving efficiency
  • Switch circuit of power transducer with voltage wave eliminator for improving efficiency
  • Switch circuit of power transducer with voltage wave eliminator for improving efficiency

Examples

Experimental program
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Embodiment Construction

[0017] figure 2 A preferred embodiment of the switching circuit according to the present invention is shown. It includes a voltage clipping device 20, a resistance device 30, a transistor 25, and a transistor 50. The voltage clipping device 20 has an input terminal VDI, an output terminal VDO, a control terminal VP, and a gate terminal VG. The gate terminal VG is connected to the control terminal VP. The input terminal VDI is connected to the input voltage source V IN . The transistor 25 is connected in series with the voltage clipping device 20 to switch the input voltage V IN And supply voltage V CC Provided to the control circuit 10 of the power converter. The drain terminal of the transistor 25 is connected to the output terminal VDO of the voltage clipping device 20. The source terminal of the transistor 25 is coupled to transfer the input voltage V IN Switch to the control circuit 10. In order to turn on the voltage clipping device 20 and the transistor 25, the r...

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PUM

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Abstract

The invention comprises: a voltage clipping unit, a resistor unit, a first transistor and a second transistor. Said voltage clipping unit is coupled to the input voltage; said first transistor is connected to the voltage clipping unit in series in order to switchover the input voltage; said second transistor is coupled in order to return a control signal to control the first transistor and said voltage clipping unit; said resistor provides a biasing voltage in order to open the voltage clipping unit and the first transistor when the second transistor is closed; when the second transistor is opened, said first transistor will be closed and the voltage clipping unit will be made with a negative bias.

Description

Technical field [0001] The invention relates to a switching circuit. More specifically, the present invention relates to switching circuits for power converters. Background technique [0002] figure 1 Show the conventional switching circuit. When the power converter is turned on, the voltage V CC Via transistor 11 from high voltage source V IN It is supplied to the control circuit 10 of the power converter. Once the control circuit 10 starts to operate, it is powered through the transformer winding 100 via the diode 90 and the capacitor 70. Thereafter, the transistor 11 will be turned off to save power consumption. The transistor 12 is used to control the on / off operation of the transistor 11. The resistor 15 is used to provide a bias voltage to turn on the transistor 11. Control signal S N The transistor 12 is controlled via the inverter 14. With control signal S N Disabled, the transistor 12 will be turned on to turn off the transistor 11. However, when the transistor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48H02M7/537H03K17/687
Inventor 黄志丰蒋秋志伍佑国黄伟轩杨大勇
Owner SYST GEN