CN206293931U - A mobile phone battery charger circuit - Google Patents

Abstract

The utility model discloses a mobile phone battery charger circuit. After the 220V alternating current is stepped down by a step-down transformer T1 and then rectified by a rectifier diode VD1-VD4, one end is connected with the anode of the mobile phone battery E1, and the other end is grounded; the DC power is passed through the diode. After VD5 and filter capacitor C1, it is connected to the input terminal of the three-terminal voltage regulator 7806 through the resistor R1. The anode of the mobile phone battery E1 is connected; a resistor R4 is connected in series with the light-emitting diode LED3 and then a parallel resistor R3 is connected between the cathode of the mobile phone battery E1 and the ground terminal GND. The circuit of the utility model can be charged by direct current or alternating current, and the charging circuit is simple to control, and has the characteristics of small volume, convenient portability and low cost.

Description

A mobile phone battery charger circuit

technical field

The utility model relates to the technical field of mobile phone battery chargers, in particular to a mobile phone battery charger circuit.

Background technique

The charger is composed of a stable power supply plus necessary constant current, voltage limiting, time-limiting and other control circuits. It is mainly a device that provides energy for power storage devices. It is widely used in mobile phones, cameras, digital and other electrical appliances in the field of life. The power supply of the existing mobile phone chargers generally adopts PWM control, and the switching on and off of the power tube needs to use the PWM control of the dedicated integrated chip, which is prone to shoot-through phenomenon, and the circuit cost is relatively high. And the charging mode of mobile phone charger is single, generally only adopts AC power supply to charge.

Utility model content

The utility model provides a battery charger circuit for a mobile phone with simple charging control and low circuit cost. The circuit can either adopt a direct current charging mode or an alternating current charging mode.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A cell phone battery charger circuit, comprising 220V AC, step-down transformer T1, rectifier diodes VD1-VD4, cell phone battery E1, DC power supply, and three-terminal voltage regulator 7806. After the 220V AC is stepped down by the step-down transformer T1, After being rectified by the rectifier diode VD1-VD4, one end is connected to the anode of the mobile phone battery E1, and the other end is grounded; the DC power supply is connected to the input end of the three-terminal voltage regulator 7806 through the resistor R1 after passing through the diode VD5 and the filter capacitor C1. The three-terminal voltage regulator 7806 is connected to the ground terminal through the light-emitting diode LED1, and the output terminal of the three-terminal voltage regulator 7806 is connected to the anode of the mobile phone battery E1 through the diode VD6; a resistor R4 is connected in series with the light-emitting diode LED3, and then a resistor R3 is connected in parallel. between the cathode of the mobile phone battery E1 and the ground terminal GND.

Further, the input end of the three-terminal regulator 7806 is connected with an input filter capacitor C2.

Further, the output terminal of the three-terminal regulator 7806 is connected with an output filter capacitor C3.

Further, a resistor R2 and a light emitting diode LED2 are connected in series between the anode of the mobile phone battery E1 and the ground terminal GND.

Further, the anode of the light emitting diode LED2 is connected to the resistor R2, and the cathode of the light emitting diode LED2 is connected to the ground terminal GND.

Further, the DC power supply is a 12-13.8V DC power supply.

The beneficial effects of the utility model: a mobile phone battery charger circuit, the circuit can adopt DC or AC charging mode, the charging circuit is easy to control, and has the characteristics of small volume, convenient portability and low cost.

Description of drawings

Fig. 1 is a circuit schematic diagram of the utility model;

detailed description

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

During specific implementation, in conjunction with Fig. 1, a kind of mobile phone battery charger circuit comprises 220V alternating current, step-down transformer T1, rectifier diode VD1-VD4, mobile phone battery E1, DC power supply, three-terminal regulator 7806, and described 220V alternating current passes through After the step-down transformer T1 is stepped down, and then rectified by the rectifier diode VD1-VD4, one end is connected to the anode of the mobile phone battery E1, and the other end is grounded to GND; after the DC power supply passes through the diode VD5 and the filter capacitor C1, it is stabilized by the resistor R1 and the three terminals The input terminal of the three-terminal regulator 7806 is connected, the three-terminal voltage regulator 7806 is connected to the ground terminal through the light-emitting diode LED1, the output terminal of the three-terminal voltage regulator 7806 is connected to the anode of the mobile phone battery E1 through the diode VD6; after the resistor R4 is connected in series with the light-emitting diode LED3 The parallel resistor R3 is then connected between the cathode of the mobile phone battery E1 and the ground terminal GND. The input end of the three-terminal regulator 7806 is connected with an input filter capacitor C2. The output terminal of the three-terminal regulator 7806 is connected with an output filter capacitor C3. A resistor R2 and a light-emitting diode LED2 are connected in series between the anode of the mobile phone battery E1 and the ground terminal GND. The anode of the light-emitting diode LED2 is connected to the resistor R2, and the cathode of the light-emitting diode LED2 is connected to the ground terminal GND. The DC power supply is 12-13.8V DC power supply.

During specific work, the mobile phone battery charger circuit can use two kinds of power sources to charge the mobile phone battery. One is AC power charging, 220V AC is stepped down through the step-down transformer T1, and the secondary side of the step-down transformer T1 outputs 9V AC voltage, which is then rectified by the rectifier diode VD1-VD4 to charge the mobile phone battery E1. When the mobile phone battery E1 is charging, the light-emitting diode LED2 and the light-emitting diode LED3 emit light, among which the light-emitting diode LED2 is the charging indication of the AC power supply, and the light-emitting diode LED3 is the charging indication of the mobile phone battery E1; the other is charging with a low-voltage DC power supply, 12-13.8V DC The power supply passes through the polarity diode VD5, and then is filtered by the capacitor C1. After the resistor R1 limits the current, it enters the input terminal of the three-terminal voltage regulator 7806, and the output terminal of the three-terminal voltage regulator 7806 stabilizes and outputs 7-8V DC through the isolation diode VD6. The battery E1 of the mobile phone is charged, and the light-emitting diode LED1 and the light-emitting diode LED3 emit light at the same time, and the light-emitting diode LED1 is a DC charging instruction.

The circuit of the utility model can be charged by direct current or alternating current, and the charging circuit is simple to control, and has the characteristics of small volume, convenient portability and low cost.

The above-mentioned embodiments are only descriptions of preferred implementations of the present utility model, and are not intended to limit the concept and scope of the present utility model. On the premise of not departing from the design concept of the present utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the present utility model shall fall within the protection scope of the present utility model.

Claims (6)

1. a kind of battery charger for mobile phone circuit, it is characterised in that：Including 220V alternating currents, step-down transformer T1, the pole of rectification two Pipe VD1-VD4, battery of mobile phone E1, dc source, three terminal regulator 7806, the 220V alternating currents drop by step-down transformer T1 After pressure, then after rectified diode VD1-VD4 rectifications, one end is connected with battery of mobile phone E1 anodes, other end ground connection；The direct current Power supply with the input of three terminal regulator 7806 by resistance R1 by after diode VD5, filter capacitor C1, being connected, and three ends are steady Depressor 7806 is connected by LED 1 with earth terminal, the output end of three terminal regulator 7806 by diode VD6 with Battery of mobile phone E1 anodes are connected；Parallel resistance R3 is connected to the mobile phone electricity again after having resistance R4 to be connected with LED 3 Between pond E1 negative electrodes and earth terminal GND.

2. according to a kind of battery charger for mobile phone circuit described in claim 1, it is characterised in that：The three terminal regulator 7806 Input be connected with input filter capacitor C2.

3. according to a kind of battery charger for mobile phone circuit described in claim 1, it is characterised in that：The three terminal regulator 7806 Output end be connected with output filter capacitor C3.

4. according to a kind of battery charger for mobile phone circuit described in claim 1, it is characterised in that：The battery of mobile phone E1 anodes Resistance R2, LED 2 are in series between earth terminal GND.

5. according to a kind of battery charger for mobile phone circuit described in claim 4, it is characterised in that：The LED 2 Anode be connected with resistance R2, the negative electrode of LED 2 is connected with earth terminal GND.

6. according to a kind of battery charger for mobile phone circuit described in claim 1, it is characterised in that：The dc source is 12- 13.8V dc sources.