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DC voltage converter

A DC voltage and converter technology, which is applied in the direction of converting DC power input to DC power output, output power conversion devices, instruments, etc., and can solve problems such as poor power conversion efficiency

Inactive Publication Date: 2009-03-11
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Makes the power conversion performance of traditional DC voltage converters extremely poor in the low load range

Method used

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  • DC voltage converter
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Examples

Experimental program
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Embodiment Construction

[0113] figure 2 It is an embodiment of the DC voltage converter of the present invention, which includes an inductor L, a load detector 202 , a variable-size power transistor group 204 , and a power transistor size controller and driver 206 . Compared with the traditional power transistor group 110 of FIG. 1, the variable-size power transistor group 204 adopted in the present invention combines the large-size PMOS (Mp) and the large-size NMOS (Mn) of FIG. PMOS (Mp1-MpN) and multiple small-sized NMOS (Mn1-MnN) connected in parallel to each other are replaced. The plurality of small-sized PMOSs (Mp1-MpN) will provide a path for a converted voltage output terminal Vout of the DC voltage converter to be coupled to an original DC voltage source VDD through the inductor L, and the plurality of small-sized NMOSs (Mn1- MnN) will provide a path for the converted voltage output terminal Vout to be coupled to a ground terminal through the inductor L. However, compared with FIG. 1 , the...

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PUM

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Abstract

A DC voltage converting device comprises a load inspecting device, a size changeable power transistor group, and a power transistor size control device and drive device. The load inspecting device is used for inspecting the size of load current. The size changeable power transistor group is provided with a plurality of PMOS which are connected in parallel and a plurality of NMOS which are connected in parallel. The power transistor size control device and drive device is coupled between the load inspecting device and the size changeable transistor group so as to control the conduction status of the plurality of PMOS and the plurality of NMOS. As the load current changes, the size changeable power transistor group can adjust the potential of one converting voltage output end by different general sizes.

Description

technical field [0001] The invention relates to a DC voltage converter (DC-DC converter). Background technique [0002] FIG. 1 is an implementation of a conventional DC voltage converter, which is used to convert an original DC voltage source VDD, and the converted DC voltage is output from a converted voltage output terminal Vout. The traditional DC voltage converter includes an inductor L, a pulse generator 102 (Pulse Width Modulation, PWM), a power transistor enable signal generator 104, a power transistor group 110 (Power MOS), for the power transistor group 110 A driver circuit 106 (driver) for the P-type metal oxide semiconductor transistor Mp (PMOS), and a driver circuit 108 for the N-type metal oxide semiconductor transistor Mn (NMOS) of the power transistor group 110 . [0003] The voltage Vout at the switching voltage output end is divided by the resistors R1 and R2, and then input to the pulse generator 102 to generate a pulse Vswitch. The power transistor enabl...

Claims

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Application Information

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IPC IPC(8): H02M3/155H02M3/156
Inventor 陈科宏郭斯彦黄宏玮甘瑞铭
Owner IND TECH RES INST