Output voltage stabilization circuit of charger baby

Abstract

The invention relates to an output voltage stabilization circuit of a charger baby. The output voltage stabilization circuit comprises an USB output interface, wherein the USB output interface comprises a power output pin and a ground pin, a first voltage stabilization capacitor is arranged between the power output pin and the ground pin, a ground end is further coupled to an N channel enhancement field-effect transistor, a first voltage sharing resistor is connected in series between a gate of the N channel enhancement field-effect transistor and the ground end, a second voltage sharing resistor is further coupled between a drain of the N channel enhancement field-effect transistor and the ground end, a source of the N channel enhancement field-effect transistor is coupled to an oscillation circuit, and the oscillation circuit is further coupled to the ground end. The output voltage stabilization circuit has the advantages that a relatively good voltage stabilization effect can be achieved, an output voltage between the ground end and the ground pin is compensated, and a compensation mode is that a load is compensated by an output current of the enhancement N channel field-effect transistor; and during charging, the current is shunted to the ground end from the ground pin so as to achieve current equalization if the load fluctuates and the voltage of the drain does not change, and the charging voltage is ensured to be relatively stable.

Description

technical field [0001] The invention relates to the technical field of mobile charging, and more specifically relates to an output voltage stabilizing circuit of a power bank. Background technique [0002] Charger Baby refers to a device that can directly charge mobile devices and has its own power storage unit. At present, the main categories in the market are charging treasures specially configured for iPhone and multifunctional charging treasures, but even for iPhones, they are basically equipped with standard USB output, which can basically meet the needs of mobile devices such as mobile phones, MP3, MP4, PDA, PSP, bluetooth earphones, digital cameras and other digital products, there are certain problems in the existing charging treasure, especially for the circuit of the fast charging interface, the stable output voltage is more important, and the instability of the core current is very easy to cause the output voltage instability phenomenon. Contents of the inventi...

AI Technical Summary

Problems solved by technology

At present, the main categories in the market are charging treasures specially configured for iPhone and multifunctional charging treasures, but even for iPhones, they are basically equipped with standard USB output, which can basically meet the needs of mobile devices such as mobile phones, MP3, MP4, PDA, PSP, bluetooth earphones, digital cameras and other digital products, there are certain problems in the existing charging treasure, especially for the circuit of the fast charging interface, the stable output voltage is more important, and the instability of the core current is very easy to cause the output voltage instability phenomenon

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