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High-side transistor driver for power converters

A technology of high-side transistors and low-side transistors, applied in the direction of output power conversion devices, transistors, semiconductor devices, etc., can solve problems such as noise, increase the cost and complexity of drive circuits, and achieve the effect of improving efficiency

Inactive Publication Date: 2006-10-18
SYST GEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technique uses a voltage doubler circuit and other circuits that require additional switching components, thus increasing the cost and complexity of the drive circuit
In addition, the high frequency charging and discharging of voltage doubler capacitors in the charge pump will cause severe noise at the voltage source terminal and the ground reference terminal

Method used

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  • High-side transistor driver for power converters
  • High-side transistor driver for power converters
  • High-side transistor driver for power converters

Examples

Experimental program
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Embodiment Construction

[0020] figure 2 shows a high-side transistor driver according to the present invention, wherein a floating ground terminal V S Connected to a source of a high-side transistor 10 . A floating supply terminal V CC Used to supply a float voltage to the high-side transistor driver. A charge-pump diode 40 and a bootstrap capacitor 30 are connected in series. An anode of charge-pump diode 40 is supplied with a bias voltage V B , and one negative terminal of the bootstrap capacitor 30 is connected to the floating ground terminal V S . A cathode of charge-pump diode 40 and a positive terminal of bootstrap capacitor 30 are connected to the floating supply terminal.

[0021] When a low-side transistor 20 is turned on, the bias voltage V B will charge the bootstrap capacitor 30 and at the floating supply terminal V CC A floating voltage is generated. The high-side transistor driver further includes an inverter for driving the high-side transistor 10 . The inverter is composed ...

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PUM

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Abstract

The invention relates to a high-side transistor driver including a high-side transistor, a low-side transistor, a driving buffer and a control transistor. A charge-pump diode and a bootstrap capacitor generate a float voltage when the low-side transistor is turned on. The drive buffer will deliver the floating voltage to turn on the high side transistor. The control transistor is used to switch the drive buffer. The high-side transistor driver further includes a speed-up circuit. The acceleration circuit generates a differential signal by means of capacitive coupling. When the control transistor is turned off, the speed-up circuit speeds up the charging of the parasitic capacitor of the control transistor, thereby speeding up the switching of the high-side transistor.

Description

technical field [0001] The present invention relates to a high-side transistor driver, and more particularly, to a driver circuit for driving high-side transistors of a power converter. Background technique [0002] Many power converters today use bridge circuits to control a voltage source coupled to a load. Power supplies and motor drives are common examples of such power converters. [0003] A bridge circuit typically has a pair of transistors connected in series across a voltage source, with a high-side transistor connected to the voltage source and a low-side transistor connected to a ground reference. The bridge circuit includes a common node connected between the high-side transistor and the low-side transistor. The common node is in turn coupled to the load. [0004] The high-side and low-side transistors are controlled to conduct alternately. When this occurs, the voltage level of the common node swings between the voltage level of the voltage source and the gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/08H03K17/0412H03K17/06
CPCH03K17/04123H03K17/063H03K2217/0081
Inventor 杨大勇
Owner SYST GEN