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Semi-bridge conrol signal generating circuit and method thereof

A technology for controlling signals and generating circuits, which is applied in the direction of converting irreversible DC power input into AC power output, and can solve the problems that the half-bridge control chip cannot directly drive the electronic switch.

Inactive Publication Date: 2005-10-05
NIKO SEMICON
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a half-bridge control signal generating circuit and its method to solve the problem that the electronic switch cannot be directly driven by the half-bridge control chip in the prior art

Method used

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  • Semi-bridge conrol signal generating circuit and method thereof
  • Semi-bridge conrol signal generating circuit and method thereof
  • Semi-bridge conrol signal generating circuit and method thereof

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Embodiment Construction

[0075] Please refer to FIG. 3 , which is a schematic circuit diagram of a half-bridge control signal generating circuit driving a load according to the present invention. The half-bridge control signal generating circuit 1 is connected to a primary side of a transformer T1 through two electronic switches Q3 and Q4 to control the opening and closing of the two electronic switches Q3 and Q4. The half-bridge control signal generating circuit 1 is also connected to the secondary side of the transformer T1 through a feedback circuit 2 for obtaining a feedback signal of the load 5 . At the same time, it is connected to a power supply unit 4 for obtaining a working power Vdd (not marked). The half-bridge control signal generation circuit 1 outputs two control signals from the first output terminal DRV1 and the second output terminal DRV2, and controls the opening and closing of the two electronic switches Q3 and Q4 respectively, so as to provide a DC power supply provided by the powe...

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Abstract

Connected to primary side of a transformer, two electronic switches in use for control of turning on or off two switches convert DC power supply to AC power supply for a load to use. The signal generation circuit includes following parts: a logic unit of AND gate, a NAND gate, a circuit protection unit, a waveform generator, clock generator, soft starting up unit, a sample hold unit, first and second comparators etc. the invention is able to direct control and drive operation of diverter switch in semi bridge type circuit architecture.

Description

technical field [0001] The invention relates to a half-bridge control signal generation circuit and method thereof, in particular to a circuit and method capable of outputting control signals to control the action of a switch to achieve power conversion and signal transmission. Background technique [0002] In the increasingly complex electronic and computer devices, the power supply device is more important. The power supply device can be divided into two categories: linear type and switching type. Since the linear type has many disadvantages, it is therefore At present, the power supply devices produced in the industry all use the switching type to achieve. [0003] The power supply (Power Supply) of the TFT panel backlight mainly uses an inverter circuit (Inverter Circuit) that converts direct current (DC) into alternating current (AC) to achieve energy conversion and drive the light emission of cold cathode fluorescent lamps (CCFL). The known inverter circuit (Inverter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
Inventor 王耀震
Owner NIKO SEMICON
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