A wired charging master-slave structure slave device presence detection method

A technology of wired charging and detection method, which is applied in the direction of exchanging data chargers, current collectors, measuring electricity, etc., and can solve the problem of being unable to distinguish whether the voltage of the main device is insufficient or not in place.
CN114465330BActive Publication Date: 2022-06-24CHENGDU YICHONG WIRELESS POWER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU YICHONG WIRELESS POWER TECH CO LTD
Publication Date
2022-06-24

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Abstract

The present invention provides a wired charging master-slave structure detection method, including: detecting whether the voltage VIN of the slave device is greater than the undervoltage lockout voltage UVLO; state; if the voltage VIN is less than the undervoltage lockout voltage UVLO, the presence state is detected by comparing the voltage VIN with various threshold voltages. The present invention can detect various on-position states of the slave device when the master device is low voltage.
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Description

technical field

[0001] The invention relates to the technical field of charging equipment, and in particular, to a method for detecting the presence of a slave device in a wired charging master-slave structure. Background technique

[0002] The low-power requirements of wearable devices are very common. In order to reduce power consumption in the design, the devices in the master-slave structure also need to obtain whether they are in the current state so that they can enter the low-power mode. The master (powered device) provides power and can determine whether the slave device is plugged in in a number of different ways, such as current load, communication, etc. The slave device can only determine whether it is in place through VIN, but there is a low voltage of the master device (power supply device), and the slave device cannot distinguish whether the voltage of the master device (power supply device) is insufficient or not connected when VIN=0 out of the box). The sla...

Claims

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