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Soft start device and method for DC-DC converter

A DC converter, soft start technology, applied in the direction of converting DC power input to DC power output, output power conversion device, high-efficiency power electronic conversion, etc.

Active Publication Date: 2021-11-05
SHENZHEN CHALLWOON SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in order to achieve linear control during mode transition, the above device generates a control signal (E / A OUT) with an initial slope to respond to the slope of the control signal at the beginning of the switching mode to gradually increase the PWM duty cycle
That is, because there is a slope limit on the control signal (E / A OUT) in the mode transition interval, it is difficult to quickly increase the output voltage to the target level

Method used

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  • Soft start device and method for DC-DC converter
  • Soft start device and method for DC-DC converter
  • Soft start device and method for DC-DC converter

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Embodiment Construction

[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing the present invention, well-known functions or structures, such as the specific structure of a DC-DC converter, will not be described in detail. The switching mode which is classified into an asynchronous driving method and a synchronous driving method in terms described later may also be defined as a gate control mode.

[0039] first, figure 1 It is a structural schematic diagram of a soft start device for a DC-DC converter in an embodiment of the present invention, figure 2 for figure 1 Schematic diagram of the structure of the gate controller 12 in .

[0040] The soft start device for the DC-DC converter involved in the embodiment of the present invention uses the linear charging mode and the switch mode together to realize the soft start, and uses the asynchronous drive mode and the synchronous drive mode together i...

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Abstract

The present invention relates to a soft start device and method for a DC-DC converter, said method comprising the steps of: supplying current in a linear charging mode to linearly increase the output voltage of the DC-DC converter from an initial level; In the initial stage of the mode, drive and control a plurality of parallel-connected power switching elements in an asynchronous manner, thereby increasing the output voltage while preventing inrush current; A plurality of said power switching elements are driven and controlled, so as to rapidly increase the output voltage of the DC-DC converter to a target level.

Description

technical field [0001] The invention relates to a power supply device, in particular to a soft start device for a DC-DC converter and a method thereof. Background technique [0002] A power supply device for stably supplying electric power in electronic communication equipment is the most basic part of a language system, and as such a power supply device, research on a switch-mode power supply device such as a DC-DC converter is underway. [0003] A DC-DC converter that performs a step-up operation may generate excessive inrush current (inrush current) during startup. In order to prevent such a phenomenon, it is necessary to apply a soft-start method. [0004] Common soft-start methods include a linear charge method that provides a limited current to the output capacitor to increase the output voltage of the DC-DC converter, and improves the DC-DC conversion by changing the PWM (pulse width modulation) duty cycle. The switching method of the output voltage of the device, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02M1/36
CPCH02M1/32H02M1/36Y02B70/10H02M1/08H02M3/156H03K7/08H02M1/0058
Inventor 尹秉勋金庚焕梁大成郑遂暋
Owner SHENZHEN CHALLWOON SEMICON CO LTD
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