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Power circuit and electronic product

A technology of power supply circuit and switching circuit, which is applied to electrical components, regulating electrical variables, instruments, etc., can solve the problems of small starting current, large starting current, and relatively large voltage fluctuation of power supply lines, so as to improve stability and avoid voltage fluctuations. Stable, avoid the effect of power supply voltage instability

Active Publication Date: 2015-06-03
QINGDAO GOERTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A power supply line often supplies power to multiple loads at the same time. Some loads have a large start-up current, and some loads have a small start-up current. When the power supply line is turned on, the load with a large start-up current will cause relatively large voltage fluctuations on the power supply line. As a result, it affects the normal start-up of loads with small starting currents, making the stability of starting loads with small starting currents relatively poor

Method used

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Embodiment 1

[0021] Embodiment 1. The power supply circuit of this embodiment mainly includes a power input terminal PIN, a first load power supply terminal LOAD1, a second load power supply terminal LOAD2, a system control terminal EN and a voltage conversion module, etc., see figure 1 As shown, the power input terminal PIN is connected to the voltage input terminal of the voltage conversion module, the voltage output terminal of the voltage conversion module is connected to the first load power supply terminal LOAD1, the system control terminal EN is connected to the system, receives the control signal sent by the system, and communicates with the The enable terminal of the voltage conversion module is connected; the power input terminal PIN is connected to the voltage divider circuit through the switch path of the first switch circuit, and the voltage divider circuit is connected to the second load power supply terminal LOAD2; the voltage output terminal of the voltage conversion module i...

Embodiment 2

[0038] Embodiment 2. The difference between the power supply circuit of this embodiment and Embodiment 1 is that the first switch circuit and the second switch circuit are different, see figure 2 As shown, the other circuit structures are the same as those in the first embodiment, and details can be referred to in the first embodiment, which will not be repeated here.

[0039] The first switch circuit is mainly provided with a first capacitor C1, a first resistor R1, a first NPN transistor Q1, a first PNP transistor Q5, etc., the system control terminal EN is connected to one end of the first capacitor C1, and the first capacitor C1 The other end of the first resistor R1 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded; the intermediate node between the first capacitor C1 and the first resistor R1 is connected to the base of the first NPN transistor Q1, and the first NPN transistor Q1 The emitter is grounded, the collect...

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Abstract

The invention discloses a power circuit which comprises a power input end, a first load power supply end, a second load power supply end, a system control end and a voltage conversion module, wherein the power input end is connected with the voltage input end of the voltage conversion module, and the voltage output end of the voltage conversion module is connected with the first load power supply end; the system control end is used for receiving a control signal sent by a system and connected with the enabled end of the voltage conversion module; the power input end is connected with a voltage division circuit through a switching path of a first switching circuit, and the voltage division circuit is connected with the second load power supply end; the voltage output end of the voltage conversion module is connected with the second load power supply end through a switching path of a second switching circuit; the system control end is connected with the control end of the first switching circuit and the control end of the second switching circuit. The power circuit improves the stability of load starting. The power circuit is applied to the circuit design of an electronic product, so that the starting stability of the electronic product is improved.

Description

technical field [0001] The invention belongs to the technical field of circuits, and in particular relates to a power supply circuit and electronic products designed using the power supply circuit. Background technique [0002] A power supply line often supplies power to multiple loads at the same time. Some loads have a large start-up current, and some loads have a small start-up current. When the power supply line is turned on, the load with a large start-up current will cause relatively large voltage fluctuations on the power supply line. As a result, the normal startup of the load with a small startup current is affected, and the stability of the startup of the load with a small startup current is relatively poor. Contents of the invention [0003] The invention provides a power supply circuit, which improves the stability of load startup. [0004] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
Inventor 李卫国
Owner QINGDAO GOERTEK