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Low quiescent current level conversion circuit and electronic equipment provided with the circuit

A technology of static current and conversion circuit, applied in the direction of logic circuit connection/interface layout, etc., can solve the problems of short battery life of smart watches, the battery cannot be made too large, and the conversion efficiency is low, so as to improve the battery life and reduce the static current. , the effect of prolonging the charging time

Active Publication Date: 2016-09-21
QINGDAO GOERTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if there is a quiescent current of several hundred μA, compared with the working current of several μA, the conversion efficiency is very low and the power consumption is relatively large.
Due to the limited size of the smart watch, its battery cannot be made too large, which leads to a relatively short battery life of the smart watch

Method used

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  • Low quiescent current level conversion circuit and electronic equipment provided with the circuit
  • Low quiescent current level conversion circuit and electronic equipment provided with the circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a low quiescent current level conversion circuit includes an MCU and a DCDC circuit. The output terminal of the DCDC circuit is electrically connected to the power input pin of the MCU. It also includes an LDO circuit. The LDO circuit is connected in parallel with the DCDC circuit. The output terminal of the LDO circuit Electrically connected to the power input pin of the MCU; logic control circuit, the input end of the logic control circuit is electrically connected to the control output pin MCU_EN of the MCU (such as figure 2 As shown), the two output terminals of the logic control circuit are electrically connected to the LDO circuit and the DCDC circuit respectively, and the logic control circuit controls the on and off of the LDO circuit and the DCDC circuit according to the signal of the control output pin MCU_EN of the MCU. The LDO circuit and the DCDC circuit are electrically connected to the same power supply. The power supply is a l...

Embodiment 2

[0037] An electronic device includes a casing, and the low quiescent current level conversion circuit described in the first embodiment is arranged in the casing.

[0038] Embodiment 1 can be used for electronic devices that are often in power-saving mode, such as mobile phones, earphones (including bluetooth earphones and headphones), various electronic touch screens, and smart watches that can communicate wirelessly with mobile phones. described low quiescent current level shifting circuit.

[0039] After the electronic equipment of the present invention adopts the low static current level conversion circuit, the conversion rate of battery power is improved, the waste of power is avoided, the battery life of the electronic equipment is improved, the charging time of the electronic equipment is prolonged, and the charging of the battery is reduced times, prolonging the service life of the battery.

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Abstract

The invention discloses a low quiescent current level switching circuit and an electronic instrument comprising the same, and relates to the technical field of electronic circuits. The low quiescent current level switching circuit comprises a micro control unit and a DCDC circuit, wherein the output end of the DCDC circuit is electrically connected with a power input pin of the MCU. The low quiescent current level switching circuit further comprises an LDO circuit and a logical control circuit, wherein the LDO circuit is connected with the DCDC circuit in parallel, and the output end of the LDO circuit is electrically connected with the power input pin of the MCU. The input end of the logical control circuit is electrically connected with a control output pin MCU_EN of the MCU, the two output ends of the logical control circuit are electrically connected with the LDO circuit and the DCDC circuit respectively, and the logical control circuit controls switching on and switching off of the LDO circuit and the DCDC circuit according to signals of the control output pin MCU_EN of the MCU. By adopting the level switching circuit, power consumption of the electronic instrument can be greatly reduced, cruising ability of the electronic instrument is improved, and electrification time of the electronic instrument is prolonged.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a low quiescent current level conversion circuit and electronic equipment provided with the circuit. Background technique [0002] Nowadays, smartphones have more and more functions, and the screens are getting bigger and bigger. Although large-screen smartphones display rich content and realistic effects when used, it is very inconvenient to hold a mobile phone that is too bulky, especially for viewing simple information, such as time and date, incoming call information and text messages, etc. , It is also necessary to take out the mobile phone from the bag to operate, which is a waste of time and energy and is very inconvenient. [0003] So a kind of smart watch appeared, which can communicate with the mobile phone wirelessly, and indicate or prompt some simple mobile phone information through the light, sound or vibration of the smart watch, such as date, time, in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0175
Inventor 韩盈盈吴凡
Owner QINGDAO GOERTEK