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Low-loss DC/DC converter

A converter and driver technology, applied in the direction of converting DC power input to DC power output, conversion equipment without intermediate conversion to AC, and output power conversion devices, etc.

Inactive Publication Date: 2007-11-28
MARVELL WORLD TRADE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when higher switching frequencies are used, gate losses can constitute a major portion of the power dissipation in the system 100

Method used

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Examples

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Embodiment Construction

[0046] The low loss DC / DC converter described here has significant advantages at increased switching frequencies. Output regulators such as DC / DC converters are described in Attorney Docket No. MP0185, U.S. Patent Application No. 10 / 460,825, filed July 12, 2003, which is hereby incorporated by reference in its entirety material.

[0047] As mentioned above, by filtering the output of the two switches that are turned on and off alternately, the DC / DC converter can provide a substantially DC voltage to the load. Figure 2 illustrates a low loss DC / DC converter system 200 according to an embodiment of the present invention.

[0048] System 200 includes a first switch 210 and a second switch 220 . The first switch 210 may output a voltage at the first output terminal 211 in response to a turn-on voltage at the first control terminal 212 . Similarly, the second switch 220 may output a voltage at the second output terminal 221 in response to a turn-on voltage at the second control...

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PUM

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Abstract

A direct current to direct current converter includes first and second switches to output voltages on first and second output terminals in response to appropriate turn-on voltages at first and second control terminals. The first control terminal may selectively communicate with one of N>2 different voltages. The converter may include a first multi-level controller in communication with the first control terminal, the controller including N drivers to selectively apply the N>2 different voltages to the first control terminal.

Description

technical field [0001] The present invention relates to current converters, and more particularly, the present invention relates to direct current to direct current (DC / DC) converters. Background technique [0002] In some applications, a high switching frequency may be used to operate the DC / DC converter. For example, switching frequencies on the order of tens to hundreds of megahertz may be required in order to meet response time requirements for a particular load. However, for higher switching frequencies, the power dissipated as a result of gate switching losses may increase to unacceptable levels. [0003] Figure 1 shows a DC / DC converter system 100 in a step-down configuration known as a "buck" configuration. A pulse width modulation controller (PWM controller) 110 controls a p-switch 120 and an n-switch 130, and the p-switch 120 and the n-switch 130 are implemented using high-power transistors. Load 140 may be coupled to the outputs of p-type switch 120 and n-type ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10H02M3/155H02J1/00H02M1/08H02M3/07H02M3/158H03K17/06H03K17/16
CPCH02M3/07H02M3/1588Y02B70/1466H03K17/063H03K17/166H02M1/08H02M3/156Y02B70/10
Inventor S·苏塔迪亚
Owner MARVELL WORLD TRADE LTD