Integration switch power supply controller and switch power supply using the same

A technology of power controller and integrated switch

Active Publication Date: 2013-04-24
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Visible, using figure 1 The controller chip of the prior art shown in , the number of pins of the chip is relatively large, and the co

Method used

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  • Integration switch power supply controller and switch power supply using the same
  • Integration switch power supply controller and switch power supply using the same
  • Integration switch power supply controller and switch power supply using the same

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Embodiment Construction

[0029] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0030] refer to Figure 2A , shows a functional block diagram of a switching power supply according to an embodiment of the present invention. In this embodiment, the switching power supply 200 includes a power stage circuit and an integrated switching power supply controller 202 . Here, the power stage circuit adopts the flyback topolo...

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Abstract

The invention provides an integration switch power supply controller and a switch power supply using the same. The integration switch power supply controller comprises a multiplexing pin, wherein the multiplexing pin is used for receiving a detection voltage signal. In each switching period, within a first time interval, the detection voltage signal is in proportion to a direct current input voltage of the switch power supply, and a current compensation signal is generated according to the detection voltage signal so as to acquire a peak current of inductance flowing through the switch power supply; within a second time interval, the detection voltage signal is in proportion to an output voltage of the switch power supply, and a discharge time span of an inductive current is acquired according to the detection voltage signal; and within a third time interval, the detection voltage signal is in proportion to a voltage between two power ends of a power switching element of the switch power supply, and the integration switch power supply controller controls the power switching element to be on-state at a valley bottom moment according to the detection voltage signal.

Description

technical field [0001] The invention relates to the field of electronic technology, and more specifically, relates to an integrated switching power supply controller and a switching power supply using the same. Background technique [0002] Integrated circuit chips are widely used in various electronic devices, and portability and miniaturization are a major development direction of electronic devices. Adapted, put forward higher requirements for integrated circuit chips. High-density, high-integration, and small-volume integrated circuit chips can meet this demand. In the prior art, there are already a large number of controller chips, and a complete driving circuit can be realized with a small number of peripheral circuits. [0003] refer to figure 1 , shows a block diagram of a traditional switching power supply, which is realized by an isolated flyback converter with an output current regulation circuit. The main structure of the switching power supply adopts a flyba...

Claims

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Application Information

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IPC IPC(8): H02M7/217H02M3/335H02M1/00
CPCH02M2001/0054H02M3/33523H02M3/33507H02M1/0054Y02B70/10
Inventor 徐孝如
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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