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Soft-start switching power converting apparatus

A technology for switching power sources and conversion devices, applied to output power conversion devices, conversion equipment with intermediate conversion to AC, electrical components, etc., which can solve problems such as transistor 91 damage

Inactive Publication Date: 2015-01-14
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] refer to figure 2 , in this example, the primary current flowing through the transformer 90 and the primary winding of the transistor 91 will generate a surge current at a time t1, which will cause damage to the transistor 91

Method used

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Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] Before the present invention is described in detail, it should be noted that in the following description, similar components are denoted by the same numerals.

[0042] refer to image 3 , The first preferred embodiment of the soft-start switching power conversion device of the present invention includes a voltage conversion module 1 , a detection unit 2 , an adjustment current generation module 3 and a switching signal generation unit 4 .

[0043] The voltage conversion module 1 in this preferred embodiment is a flyback voltage conversion module, but not limited thereto.

[0044] In this preferred embodiment, the voltage conversion module 1 includes a transformer 12 , a switch 13 , a diode 14 and a capacitor 15 .

[0045] The transformer 12 has a primary winding 121 and a secondary winding 122 . The primary side winding 121 has a different ...

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PUM

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Abstract

A switching power converting apparatus includes a voltage conversion module, a detecting unit, and a switching signal generating unit. The voltage conversion module converts an input voltage into an output voltage associated with a secondary side current, which flows through a secondary winding of a transformer and is generated based on a switching signal. The detecting unit generates a detecting signal based on the output voltage and a predetermined reference voltage. The switching signal generating unit generates the switching signal based on the detecting signal and an adjusting signal so that the secondary side current is gradually increased during a start period of the switching power converting apparatus.

Description

technical field [0001] The invention relates to a power supply device, in particular to a soft-start switching power conversion device. Background technique [0002] refer to figure 1 , is an existing flyback switching power conversion device, including a voltage conversion module 9 providing an output voltage, and a switching controller 8 controlling the voltage conversion module 9 . [0003] The voltage conversion module 9 includes a transformer 90 , a transistor 91 , a diode 92 and a capacitor 93 . [0004] The transformer 90 has a primary winding for receiving an input voltage, and a secondary winding. [0005] The transistor 91 is electrically connected between the primary winding of the transformer 90 and ground, and is controlled by a pulse width modulation signal to switch between conduction and non-conduction. The anode of the diode 92 is electrically connected to the same terminal of the secondary winding. [0006] The voltage conversion module 9 converts the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/36
CPCH02M3/33515H02M3/33507H02M3/33523H02M3/36
Inventor 何峻彻潘均宏唐健夫陈曜洲
Owner RICHTEK TECH
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