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Half-bridge type driver

A drive device, half-bridge technology, applied in the direction of output power conversion device, electrical components, AC power input conversion to DC power output, etc., can solve the problems of limitation, control chips cannot be shared and unified purchase materials, etc.

Inactive Publication Date: 2009-08-12
LIEN CHANG ELECTRONICS ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the use of the inverter circuit (Inverter Circuit) is often limited to the control chip, and the inverter circuit (Inverter Circuit) is subject to the above description, so that the control chips cannot be shared and purchased in a unified manner, or they need to be matched more complex circuits

Method used

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  • Half-bridge type driver
  • Half-bridge type driver
  • Half-bridge type driver

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0039] Please refer to Figure 5, is a schematic circuit diagram of the half-bridge driving device of the present invention. The half-bridge driving device of the present invention is connected to the primary side of a transformer TX to convert a DC power supply Vcc into an AC power supply AC, and the AC power supply AC provides the energy required for the action of the load RL through the transformer TX.

[0040] Refer again Figure 5 , The half-bridge drive device of the present invention includes: a push-pull control chip 103 , a drive circuit 30 and a half-bridge switch assembly 32 . The push-pull control chip 103 is provided with a first output terminal A and a second output terminal B, and the first output terminal A and the second output terminal B respectively output a first output terminal with a duty cycle less than 50%. A control signal a and a second control signal b. The drive circuit 30 is coupled to the first output terminal A of the push-pull control chip 10...

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PUM

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Abstract

A half-bridge driving device includes: a push-pull control chip, outputting a first control signal and a second control signal with a duty ratio less than 50%; a driving circuit coupled to the push-pull control chip and a DC a power supply, receiving the first control signal and the second control signal; and a half-bridge switch component composed of two N-channel field effect transistors, the half-bridge switch component is coupled to the DC power supply, the drive circuit and A transformer, the half-bridge switching component is controlled by the driving circuit, and is used to switch the DC power to the AC power and transmit it to the primary side of the transformer.

Description

technical field [0001] A half-bridge driving device, in particular, a driving device that can control a half-bridge converter and drive a load by using a push-pull control chip. Background technique [0002] The power supply (Power Supply) of the TFT panel backlight mainly uses an inverter circuit (Inverter Circuit) to achieve energy conversion and drive the light emission of cold cathode fluorescent lamps (CCFL). The known inverter circuit (Inverter Circuit) is generally divided into a half-bridge inverter circuit, a full-bridge inverter circuit and a push-pull inverter circuit due to different circuit topologies. circuit. [0003] Please refer to figure 1 , is a schematic circuit diagram of a known push-pull commutation circuit applied to a CCFL load. The transformer T1 divides the circuit into a primary-side pre-stage circuit 101 and a secondary-side post-stage circuit 102 . The primary side 101 includes: a DC power supply Vcc, a first switch Q1, a second switch Q2, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/5387
Inventor 陈振刚王政雄
Owner LIEN CHANG ELECTRONICS ENTERPRISE