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Boosting converting circuit and drive control module thereof

A boost conversion circuit and circuit technology, applied in the direction of control/regulation system, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of large conduction loss and low efficiency

Inactive Publication Date: 2015-01-14
ASUSTEK COMPUTER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the gate of the power switch is directly driven by an input voltage that has not been boosted (for example, when the gate / source voltage difference Vgs of the power switch is lower than 4V), the power switch will have a relatively high on-resistance, resulting in Considerable conduction losses, resulting in inefficient

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  • Boosting converting circuit and drive control module thereof
  • Boosting converting circuit and drive control module thereof
  • Boosting converting circuit and drive control module thereof

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Embodiment Construction

[0012] see figure 1 , which is a schematic diagram of a boost conversion circuit 100 according to an embodiment of the present invention. In this embodiment, the boost conversion circuit 100 can be used in an electronic device (not shown in the figure) to provide the power required by the load 222 in the electronic device. The boost conversion circuit 100 is coupled to the input terminal 200 (for example, it can be the input voltage V of a battery module on an electronic device). I , and used to provide the converted output voltage V O to output 220.

[0013] Such as figure 1 As shown, the boost conversion circuit 100 includes an energy storage inductor L1 , a drive control module 120 , a pulse width control circuit 140 and a power switch 160 . In this embodiment, the boost conversion circuit 100 further includes a feedback circuit 180 and a diode D1.

[0014] A first end of the energy storage inductor L1 is coupled to the input end 200 , and a second end of the energy st...

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Abstract

A boost converter and a drive control module thereof are provided. The boost converter includes a inductor, a power switch, a PWM control circuit and the drive control module. The inductor is coupled between the input terminal and the output terminal. The power switch is coupled between a inductor and a ground end. The PWM control circuit is provided to provide the PWM control signal to the gate of the power switch to control the conducting state of the power switch, and the conversion output voltage at the second end. Based on the current load state of the boost converter in operation, the drive control module outputs the gate electronic potential signal to the PWM control circuit according to the input voltage or the conversion output voltage, and the PWM control circuit adjusts the voltage amplitude of the PWM control signal correspondingly.

Description

technical field [0001] The present invention relates to an electric converter, in particular to a boost conversion circuit. Background technique [0002] A boost converter circuit (boost converter) is a common power supply circuit in electronic devices, and is widely used to provide power required by low-power devices (such as portable electronic devices). Since the energy storage elements on portable electronic devices can usually only provide a low DC voltage (for example, the voltage of a battery cell is usually 3V to 4.2V), it needs to be boosted to the system operating voltage (for example, 5V) by a boost conversion circuit . [0003] To save overall space and cost, a power switch is usually included inside the boost converter. Due to the different component characteristics of the power switch itself, the optimal application situation will vary. [0004] For example, such as low on-resistance (R DS(ON) ) of the power switch, when used in the use state of output powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
CPCH02M3/157H02M3/156H02M1/08H02M1/0054Y02B70/10
Inventor 李青翰许志琬许溪河蔡承祐
Owner ASUSTEK COMPUTER INC