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Circuit of driving converter in semi bridge type by using push-pull control chip

A control chip, push-pull technology, applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components and other directions, can solve the problem of general products without structure and so on

Inactive Publication Date: 2008-12-24
LIEN CHANG ELECTRONICS ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problems existing in the commutation circuit, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above problems, which is obvious. It is a problem that relevant industry players are eager to solve

Method used

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  • Circuit of driving converter in semi bridge type by using push-pull control chip
  • Circuit of driving converter in semi bridge type by using push-pull control chip
  • Circuit of driving converter in semi bridge type by using push-pull control chip

Examples

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Embodiment Construction

[0050] The specific implementation, structure, features and functions of the half-bridge converter driven by the push-pull control chip according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0051] see Figure 5 Shown is a schematic circuit diagram of the first embodiment of the present invention. In the present invention, the half-bridge converter driven by a push-pull control chip is connected to the primary side of a transformer T2 to convert a DC power supply Vcc into an AC power supply AC, and the AC power supply AC passes through the transformer T2 to Provide the energy required for load operation. In the above description, the peak-to-peak value of the AC power source AC is the DC power source Vcc.

[0052] see next Figure 5 As shown, the present invention uses a push-pull control chip to drive the half-bridge converter, which includes: a push-pull control chip 103, a driving circ...

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PUM

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Abstract

The disclosed circuit is able to connect one driving circuit to existent well-known semi bridge type inversion circuit. Thus, control of semi bridge type inversion circuit is carried out under push-pull type control chip. The disclosed circuit includes following parts: push-pull type control chip includes two outputs; driving circuits includes two input ends and two output ends; the two inputs are connected to output ends of the push-pull type control chip to receive control from push-pull type control chip; semi bridge type switch module is composed of two electric switches, and each switch includes a control end, which is connected to two outputs of the driving circuit. The driving circuit is in use for switching DC power to AC power, which is transmitted to primary side of transformer.

Description

technical field [0001] The invention relates to a half-bridge converter driven by a push-pull control chip, in particular to a converter circuit capable of controlling the half-bridge converter and driving 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 conventional inverter circuit (Inverter Circuit) is generally divided into half-bridge inverter circuit, full-bridge inverter circuit and push-pull inverter circuit due to the difference in circuit topology. It converts direct current into Alternating current commutation circuit. [0003] see figure 1 As shown in FIG. 1 , it is a schematic circuit diagram of a known push-pull commutation circuit driving a load. The transformer T1 divides the circuit into a primary-side pre-stage circuit 10...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/538
Inventor 陈振刚王政雄
Owner LIEN CHANG ELECTRONICS ENTERPRISE