Power-off protection apparatus

A power-off protection device and power-off detection technology, which is applied to circuit devices, electrical components, emergency power supply arrangements, etc., can solve the problems of long charging time, high price, and large volume, and achieve the effect of avoiding data loss
CN101431256AInactive Publication Date: 2009-05-13BEIJING EVOC INTELLIGENT TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING EVOC INTELLIGENT TECH
Publication Date
2009-05-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a power-off protection device, comprising a power input interface unit and a power output interface unit; a power-off detecting unit used for detecting the power supply of the power input interface unit and outputting a signal indicating whether the power supply is normal or not; a charging unit used for charging by the power supply of the input interface unit and providing voltage when the power supply is off; a voltage boosting unit used for transforming the voltage provided by the power input interface unit or the charging unit into a stable voltage and transmitting the stable voltage to the power output interface unit.
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Description

technical field

[0001] The invention relates to the field of power-off protection, in particular to a power-off protection device for a tax-controlled cash register. Background technique

[0002] Usually, the tax-controlled cash register does not have a power-off protection device. Once a power outage occurs, the various physical media in the tax-controlled cash register, such as memory, tax-controlled storage, invoice storage, tax-controlled card, user card, etc. The first data transmission will be interrupted due to power failure, resulting in incomplete data transmission and inconsistent data transmission between modules, which will bring inconvenience to users.

[0003] Some tax-controlled cash registers use an internal UPS power supply to avoid data loss due to external sudden power failures. However, UPS power supply has the disadvantages of short life, long charging time, large volume and high price. Contents of the invention

[0004] In view of this, the present ...

Claims

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