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A power management device

A technology of a power management device and a power management chip, which is applied in the direction of electrical program control, sequence/logic controller program control, etc., can solve the problems affecting user experience, the battery cannot be taken out, and independent physical buttons are not allowed to be kept. The effect of reducing hardware costs

Active Publication Date: 2018-07-03
LEADCORE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, with the development of mobile terminals, the mobile terminals all adopt touch screens, and the physical keys are only allowed to retain the power button, volume + key, and volume - key, and are not allowed to reserve independent physical keys for crashes; as mobile terminals become thinner and thinner, The battery of the mobile terminal is fixed in the product and cannot be taken out
In such a case, once the mobile terminal crashes, it can only exit the crash until the battery is discharged to shutdown. It takes a long time to wait, which seriously affects the user experience.

Method used

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Embodiment 1

[0028] image 3 It is the circuit diagram of the power management device described in Embodiment 1 of the present invention. This embodiment can be applied to the situation that when the mobile terminal crashes, press and hold the power button to realize the crash exit situation, such as image 3 As shown, the power management device described in this embodiment includes:

[0029] Power management chip, first diode D1, voltage stabilizing unit D2, first transistor Q1, second transistor Q2, capacitor C1, switch K1, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, the fifth resistor R5;

[0030] The power-on pin of the power management chip, the second end of the third resistor R3, the first end of the fifth resistor R5, and the second end of the second transistor Q2 are connected;

[0031] The power state maintenance pin of the power management chip, the first end of the fourth resistor R4, and the second end of the first transistor Q1 are connect...

Embodiment 2

[0059] On the basis of Embodiment 1, the power management device described in this embodiment further defines the resistors and transistors of the power management device described in Embodiment 1, specifically including: the first resistor R1 is 2M ohms Resistors, the second resistor R2 is a 10 ohm resistor, the third resistor R3 and the fifth resistor R5 are 2K ohm resistors, the fourth resistor R4 is a 10 kohm resistor, the capacitor C1 is a 22uF (microfarad) capacitor, and the voltage stabilizing unit D2 The voltage is 3 volts, preferably a zener diode with a voltage of 3 volts. Both the first transistor Q1 and the second transistor Q2 are transistors with a conduction voltage greater than 0.5 volts and a conduction current less than 100nA (nanoampere). Both the first transistor Q1 and the second transistor Q2 are N-type metal-oxide semiconductor field-effect transistors, the voltage VGS between the gate and the source of the N-type metal-oxide semiconductor field-effect tr...

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Abstract

An embodiment of the present invention discloses a power management device, comprising a power management chip, a first diode (D1), a voltage regulator unit (D2), a first transistor (Q1), a second transistor (Q2), a capacitor (C1) ), switch (K1), first resistor (R1), second resistor (R2), third resistor (R3), fourth resistor (R4), fifth resistor (R5). The technical solutions of the embodiments of the present invention can quickly exit the dead state through the power-on button when the mobile terminal is dead, reduce the dedicated dead restart physical buttons, meet the functional design requirements of the mobile terminal, and reduce hardware costs.

Description

technical field [0001] The invention relates to the technical field of mobile terminals, in particular to a power management device. Background technique [0002] Mobile terminals often crash during use (that is, there is no response to any operation on the mobile terminal). Due to the limitation of the power management chip function of the current mobile terminal, there are generally two solutions for product crashes: Solution 1. Mobile terminal There is an independent physical button, which is specially used for crash exit; solution 2, unplug the battery of the mobile terminal, and then re-install the battery to start up. [0003] The schematic diagram of traditional mobile terminal circuit is as follows: figure 1 or figure 2 shown. When the power-on button is pressed, the button is turned on, the power-on pin (Power on) of the power management chip (PMU) is pulled up to the battery voltage through the resistor R1, the PMU starts to work, supplies power to the processo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/04
Inventor 朱建荣
Owner LEADCORE TECH