A voltage regulator circuit for charging

Abstract

The invention discloses a charging voltage stabilizing circuit which is used for stabilizing charging voltage output by a charging interface. The charging interface is connected with a power management chip of a mobile terminal through the voltage stabilizing circuit and comprises a voltage comparison module and a voltage stabilizing module, wherein the voltage comparison module detects the charging voltage output by the charging interface, judges whether the charging voltage is larger than reference voltage or not, controls a working state of the voltage stabilizing module according to a judgment result and enables the voltage output by the voltage stabilizing module to be higher than the reference voltage. The voltage stabilizing module directly outputs the charging voltage to the power management chip when the charging voltage is larger than the reference voltage, and supplements preset voltage to enable the charging voltage to be higher than the reference voltage and stabilized when the charging voltage is lower than the reference voltage, the problem that an electrical device cannot de charged due to low charging voltage and a charger or a battery severely emits heat due to long-time charging is avoided, and the service life of the charger and the service life of the battery are prolonged.

Description

technical field [0001] The invention relates to the charging technology of electronic equipment, in particular to a voltage stabilizing circuit for charging voltage. Background technique [0002] At present, the charging output voltage of chargers for charging devices such as smart phones and tablet computers is generally 5V. When the charging output voltage of the charger is lower than 5V, the charging device (such as a smart phone) will fail to charge, or the charging current will Small, resulting in the problem that the battery cannot be charged. In addition, when the charging output voltage of the charger is lower than 5V, the charging time of the mobile phone battery will be prolonged. Due to the long-term charging state, both the charger and the mobile phone battery will heat up, which is easy to damage the charger and the mobile phone battery. Therefore, when the mobile phone is charging, it is necessary to stabilize the charging voltage above 5V. Contents of the i...

AI Technical Summary

Problems solved by technology

[0002] At present, the charging output voltage of chargers for charging devices such as smart phones and tablet computers is generally 5V. When the charging output voltage of the charger is lower than 5V, the charging device (such as a smart phone) will fail to charge, or the charging current will Small, causing the problem that the battery cannot be charged

In addition, when the charging output voltage of the charger is lower than 5V, the charging time of the mobile phone battery will be prolonged. Due to the long-term charging state, both the charger and the mobile phone battery will heat up, which is easy to damage the charger and the mobile phone battery.

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