Power management system

一种电源管理系统、备用电源的技术，应用在应急电源安排、数据处理电源、电数字数据处理等方向，能够解决电池没有充电功能等问题，达到延长电池寿命的效果
CN109787346AActive Publication Date: 2019-05-21QISDA OPTRONICS (SUZHOU) CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QISDA OPTRONICS (SUZHOU) CO LTD
Publication Date
2019-05-21

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Abstract

The invention provides a power management system. The system comprises a bypass device, a main boost converter and a first linear voltage regulator, wherein the bypass device is coupled to a node andis used for outputting main input voltage to the node when the main input voltage is greater than threshold voltage and stopping work when the main input voltage is smaller than the threshold voltage;the main boost converter is coupled to the node and is used for boosting the main input voltage to the threshold voltage when the main input voltage is smaller than the threshold voltage and stoppingwork when the main input voltage is greater than the threshold voltage; and the first linear voltage regulator is coupled to the node and is used for bucking the voltage of the node so as to generatefirst voltage and providing the first voltage to a microprocessor. The system is capable of providing stable voltage output for vehicle-mounted units, so as to effectively prolong the battery lie ofstandby batteries in the vehicle-mounted units.
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Description

technical field

[0001] The invention relates to a power management system, in particular to a power management system with a bypass device. Background technique

[0002] In the driving information charging system, each vehicle will be equipped with an On-Board Unit (OBU) to obtain charging information. The vehicle unit has a variety of wireless communication devices, which can include third-generation / fourth-generation mobile communication devices, Wi-Fi protocol / Bluetooth devices, dedicated short distance communication-5.9G devices (dedicated short distancecommunication-5.9G, DSRC-5.9 G), dedicated short-range communication-2.4G device, global positioning system (global positioning system) device, frequency modulation-radio data system (RM-RDS) device and near field communication (near field communication, NFC) device.

[0003] In the case of no power supply to the motor vehicle, if the vehicle-mounted unit is removed, the vehicle-mounted unit must be able to actively not...

Claims

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