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Battery power supply circuit

A technology of power supply circuit and battery, which is applied in the direction of battery circuit devices, circuit devices, emergency protection circuit devices, etc., and can solve the problems of increasing the detection process, inability to use smart phones, and users being unable to turn on smart phones again

Inactive Publication Date: 2015-08-19
RICOH MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, users cannot turn the smartphone back on until they use the charger to activate the smartphone
For inspection engineers, this will increase the number of steps in their inspection process, and for end users who do not have a charger around at this time, they will not be able to use their smartphones at this time

Method used

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  • Battery power supply circuit
  • Battery power supply circuit
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Examples

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Embodiment Construction

[0035] based on the following figure 1 A battery power supply circuit according to an embodiment of the present invention is described.

[0036] figure 1 is a block diagram showing the configuration of the battery power supply circuit 1 according to the embodiment of the present invention. like figure 1 As shown, the battery power supply circuit 1 includes an overcurrent protection / release circuit 10 , a battery 11 such as a lithium ion battery, a load 12 , a current limiting resistor 13 , a first switching tube 14 , and a second switching tube 15 . In the embodiment according to the present invention, both the first switching transistor 14 and the second switching transistor 15 are NMOS transistors, but the present invention is not limited thereto. And in the embodiment according to the present invention, the overcurrent protection / release circuit 10, the current limiting resistor 13, and the second switch tube 15 are all located in one chip C as an overcurrent protection ...

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PUM

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Abstract

A battery power supply circuit comprises the components of a battery, a load resistor, a current limiting resistor, a first switch tube and a second switch tube. The battery power supply circuit comprises two loops. A first loop is from the anode of the battery and extends to the load and the first switch tube successively, and ends at the cathode of the battery. A second loop is from the anode of the battery and extends to the load, the current limiting resistor and the second switch tube successively, and ends at the cathode of the battery. Furthermore the battery power supply circuit comprises an overcurrent protecting / releasing circuit. The output end of the overcurrent protecting / releasing circuit outputs a control signal for switching on and switching off the control end of the first switch tube and the second switch tube, thereby realizing switching-on of the first switch tube and switching-off of the second switch tube and the current flows in the first loop when the load operates normally, and realizing switching-off of the first switch tube and switching-on of the second switch tube and the current flows in the second loop when overcurrent operation of the load occurs. When the load restores from overcurrent operation, the first switch tube is switched on and simultaneously the second switch tube is switched off, and the current flows in the first loop.

Description

technical field [0001] The invention relates to a battery power supply circuit, in particular to a battery power supply circuit with an overcurrent protection function and an overcurrent protection automatic release function. Background technique [0002] In conventional battery protection ICs, after VD3 / OCP is completed, VD3 / OCP cannot be released until the load is removed from the load side. For smartphones, the battery pack is connected to the load and cannot be removed. In this case, for the smartphone manufacturer, VD3 protection will be detected during smartphone detection, or for the end user, VD3 protection will be falsely triggered during use, such as turning on the LED flash while taking a photo or turning on the Excessive software or applications. However, the user cannot turn the smartphone back on until they use the charger to activate the smartphone. For inspection engineers, this will increase the number of steps in their inspection process, and for end use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02H3/06H02H3/087
Inventor 黄乘黄
Owner RICOH MICROELECTRONICS CO LTD