CN206506319U - A single-port charging device - Google Patents

Abstract

The utility model belongs to charge control technical field, more particularly to a kind of single port charging device.In the utility model embodiment, single port charging device uses reset control device identified input voltage, come realize single port charged, discharging function, the charging device circuit structure is simple, it is basic to be realized using discrete component, avoid and realize that without the program of writing, development cost is cheap, also shorten the cycle of exploitation using central controller.

Description

A single-port charging device

technical field

The utility model belongs to the technical field of charging control, in particular to a single-port charging device.

Background technique

With the development of the electronic industry, bluetooth earphones have been widely used in people's daily life; in the use of the above-mentioned electronic products, portable mobile power has become a very important auxiliary device and its application is very common.

When the above-mentioned electronic products are used outdoors, when the battery of the Bluetooth headset is out of power, the mobile charging device can provide timely power supplement. However, the existing single-port charging device is expensive and has a long development cycle.

Utility model content

The purpose of the embodiments of the present invention is to provide a single-port charging device, aiming at solving the problems of high price and long development period of the current single-port charging device.

The embodiment of the utility model is achieved in this way, a single-port charging device, the single-port charging device includes:

Power input circuit for charging the built-in battery BAT;

releasing the electric energy of the built-in storage battery BAT to the electric energy output circuit of the electric equipment;

The power input circuit includes:

Reset monitor U1, charge management chip U2, resistor R1, resistor R6, capacitor C1, capacitor C2, capacitor C3, capacitor C7 and switch tube;

The power supply terminal VCC of the reset monitor U1 is connected to the input terminal of the charging device, the capacitor C7 is connected between the power supply terminal VCC of the reset monitor U1 and ground, and the reset terminal RESET of the reset monitor U1 is connected to the The enable terminal EN of the charging management chip U2, the resistor R6 is connected between the input terminal of the charging device and the reset terminal RESET of the reset monitor U1, and the capacitor C1 is connected between the input terminal of the charging device and the ground, so The time terminal TIMER of the charging management chip U2 is grounded through the capacitor C3, the power supply terminal VDD of the charging management chip U2 is connected to the input terminal of the charging device, and the first end of the switch tube is connected to the input terminal of the charging device through the resistor R1 The control terminal of the switching tube is connected to the driving terminal DRV of the charging management chip U2, the battery terminal VBAT of the charging management chip U2 is connected to the positive pole of the built-in battery BAT, and the second terminal of the switching tube is connected to the The positive electrode of the built-in battery BAT, the capacitor C2 is connected between the battery terminal VBAT of the charging management chip U2 and the ground, and the serial bus terminal STAT1 of the charging management chip U2 is connected to the electric energy output circuit.

In the above structure, the electric energy output circuit includes:

Switching power supply chip U3, capacitor C4, capacitor C5, capacitor C6, resistor R2, resistor R3, resistor R4, resistor R5, diode D1 and diode D4;

The setting terminal SD of the switching power supply chip U3 is connected to the serial bus terminal STAT1 of the charging management chip U2, the input terminal VIN of the switching power supply chip U3 is connected to the positive pole of the built-in storage battery BAT, and the resistor R5 and the diode D1 are connected in series Between the input terminal VIN of the switching power supply chip U3 and the setting terminal SD of the switching power supply chip U3, the resistor R4 is connected between the input terminal VIN of the switching power supply chip U3 and the setting terminal SD of the switching power supply chip U3 Between, the capacitor C4 is connected between the input terminal VIN of the switching power supply chip U3 and the ground, the capacitor C6 is connected between the C+ terminal and the C- terminal of the switching power supply chip U3, and the switching power supply The output terminal VOUT of the chip U3 is connected to the anode of the diode D4, the cathode of the diode D4 is the output terminal of the charging device connected to the input terminal of the charging device, and the resistor R2 and the resistor R3 are connected in series to the output of the switching power supply chip U3 Between the terminal VOUT and the ground, the common connection of the resistor R2 and the resistor R3 is connected to the feedback terminal FB of the switching power supply chip U3, and the capacitor C5 is connected between the output terminal VOUT of the switching power supply chip U3 and the ground .

In the above structure, the switch tube is a MOS tube Q1, the gate of the MOS tube Q1 is the control terminal of the switch tube, the drain of the MOS tube Q1 is the first end of the switch tube, and the source of the MOS tube Q1 is The second end of the switch tube.

In the above structure, the input terminal of the charging device and the output terminal of the charging device are the same port.

In the above structure, the reset monitor U1 adopts the APX809 chip.

In the embodiment of the utility model, the single-port charging device adopts the reset monitor to identify the input voltage to realize the charging and discharging function of the single port. There is no need to write programs, the development cost is low, and the development cycle is also shortened.

Description of drawings

Fig. 1 is a circuit structure diagram of a single-port charging device provided by an embodiment of the present invention;

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Fig. 1 shows the circuit structure of the single-port charging device provided by the embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown.

A single-port charging device, the single-port charging device comprising:

Electric energy input circuit 1 for charging the built-in storage battery BAT;

releasing the electric energy of the built-in storage battery BAT to the electric energy output circuit 2 of the electric equipment;

The power input circuit 1 includes:

Reset monitor U1, charging management chip U2, resistor R1, resistor R6, capacitor C1, capacitor C2, capacitor C3, capacitor C7 and switch tube 11;

The power supply terminal VCC of the reset monitor U1 is connected to the input terminal of the charging device, the capacitor C7 is connected between the power supply terminal VCC of the reset monitor U1 and ground, and the reset terminal RESET of the reset monitor U1 is connected to the The enable terminal EN of the charging management chip U2, the resistor R6 is connected between the input terminal of the charging device and the reset terminal RESET of the reset monitor U1, and the capacitor C1 is connected between the input terminal of the charging device and the ground, so The time terminal TIMER of the charging management chip U2 is grounded through the capacitor C3, the power supply terminal VDD of the charging management chip U2 is connected to the input terminal of the charging device, and the first end of the switch tube 11 is connected to the input terminal of the charging device through the resistor R1. terminal, the control terminal of the switch tube 11 is connected to the driving terminal DRV of the charge management chip U2, the battery terminal VBAT of the charge management chip U2 is connected to the positive pole of the built-in storage battery BAT, and the second terminal of the switch tube 11 The capacitor C2 is connected between the battery terminal VBAT of the charging management chip U2 and the ground, and the serial bus terminal STAT1 of the charging management chip U2 is connected to the power output circuit 2 .

As an embodiment of the present invention, the reset monitor U1 uses an APX809 chip, and the charging management chip U2 uses an MCP73843 chip.

As an embodiment of the present invention, the electric energy output circuit 2 includes:

Switching power supply chip U3, capacitor C4, capacitor C5, capacitor C6, resistor R2, resistor R3, resistor R4, resistor R5, diode D1 and diode D4;

The setting terminal SD of the switching power supply chip U3 is connected to the serial bus terminal STAT1 of the charging management chip U2, the input terminal VIN of the switching power supply chip U3 is connected to the positive pole of the built-in storage battery BAT, and the resistor R5 and the diode D1 are connected in series Between the input terminal VIN of the switching power supply chip U3 and the setting terminal SD of the switching power supply chip U3, the resistor R4 is connected between the input terminal VIN of the switching power supply chip U3 and the setting terminal SD of the switching power supply chip U3 Between, the capacitor C4 is connected between the input terminal VIN of the switching power supply chip U3 and the ground, the capacitor C6 is connected between the C+ terminal and the C- terminal of the switching power supply chip U3, and the switching power supply The output terminal VOUT of the chip U3 is connected to the anode of the diode D4, the cathode of the diode D4 is the output terminal of the charging device connected to the input terminal of the charging device, and the resistor R2 and the resistor R3 are connected in series to the output of the switching power supply chip U3 Between the terminal VOUT and the ground, the common connection of the resistor R2 and the resistor R3 is connected to the feedback terminal FB of the switching power supply chip U3, and the capacitor C5 is connected between the output terminal VOUT of the switching power supply chip U3 and the ground .

As an embodiment of the present invention, the switching power supply chip U3 adopts an LM2750 chip.

As an embodiment of the present invention, the switch tube 11 is a MOS tube Q1, the gate of the MOS tube Q1 is the control terminal of the switch tube 11, and the drain of the MOS tube Q1 is the first end of the switch tube 11, so The source of the MOS transistor Q1 is the second terminal of the switch transistor 11 .

The working principle of the single-port charging device is as follows:

As an input port use:

1. When VIN is connected to a voltage of 4.6V~5V, because the reset monitor U1 has not reached the reset voltage value (4.6V), the reset terminal RESET maintains a high level output. The enable terminal EN of the charging management chip U2 obtains a high level to turn on the charging function, and charges the built-in battery BAT for energy supplementation.

2. Since the charging function of the charging management chip U2 is turned on, the serial bus terminal STAT1 of the charging management chip U2 outputs a low level to control the switching power supply chip U3 to turn off the output, and the switching power supply chip U3 has no voltage output. Therefore, it does not affect charging.

For export use:

1. When VOUT is connected to an electrical device, such as a Bluetooth headset to be charged, because the voltage of the headset is lower than the reset voltage value (4.6V) of the reset monitor U1, the reset monitor U1 is reset, and the reset terminal RESET outputs a low level . The enable terminal EN of the charging management chip U2 obtains a low level to turn off the charging function, and does not charge the built-in battery BAT.

2. Since the charging function of the charging management chip U2 is turned off, the serial bus terminal STAT1 outputs a high level to control the switching power supply chip U3 to start the output, and the switching power supply chip U3 has a 4.5V voltage output, thereby charging the Bluetooth headset.

In the embodiment of the utility model, the single-port charging device adopts the reset monitor to identify the input voltage to realize the charging and discharging function of the single port. There is no need to write programs, the development cost is low, and the development cycle is also shortened.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (5)

1. A single-port charging device, characterized in that the single-port charging device comprises: Power input circuit for charging the built-in battery BAT; releasing the electric energy of the built-in storage battery BAT to the electric energy output circuit of the electric equipment; The power input circuit includes: Reset monitor U1, charge management chip U2, resistor R1, resistor R6, capacitor C1, capacitor C2, capacitor C3, capacitor C7 and switch tube; The power supply terminal VCC of the reset monitor U1 is connected to the input terminal of the charging device, the capacitor C7 is connected between the power supply terminal VCC of the reset monitor U1 and ground, and the reset terminal RESET of the reset monitor U1 is connected to the The enable terminal EN of the charging management chip U2, the resistor R6 is connected between the input terminal of the charging device and the reset terminal RESET of the reset monitor U1, and the capacitor C1 is connected between the input terminal of the charging device and the ground, so The time terminal TIMER of the charging management chip U2 is grounded through the capacitor C3, the power supply terminal VDD of the charging management chip U2 is connected to the input terminal of the charging device, and the first end of the switch tube is connected to the input terminal of the charging device through the resistor R1 The control terminal of the switching tube is connected to the driving terminal DRV of the charging management chip U2, the battery terminal VBAT of the charging management chip U2 is connected to the positive pole of the built-in battery BAT, and the second terminal of the switching tube is connected to the The positive electrode of the built-in battery BAT, the capacitor C2 is connected between the battery terminal VBAT of the charging management chip U2 and the ground, and the serial bus terminal STAT1 of the charging management chip U2 is connected to the power output circuit. 2. The single-port charging device according to claim 1, wherein the power output circuit comprises: Switching power supply chip U3, capacitor C4, capacitor C5, capacitor C6, resistor R2, resistor R3, resistor R4, resistor R5, diode D1 and diode D4; The setting terminal SD of the switching power supply chip U3 is connected to the serial bus terminal STAT1 of the charging management chip U2, the input terminal VIN of the switching power supply chip U3 is connected to the positive pole of the built-in storage battery BAT, and the resistor R5 and the diode D1 are connected in series Between the input terminal VIN of the switching power supply chip U3 and the setting terminal SD of the switching power supply chip U3, the resistor R4 is connected between the input terminal VIN of the switching power supply chip U3 and the setting terminal SD of the switching power supply chip U3 Between, the capacitor C4 is connected between the input terminal VIN of the switching power supply chip U3 and the ground, the capacitor C6 is connected between the C+ terminal and the C- terminal of the switching power supply chip U3, and the switching power supply The output terminal VOUT of the chip U3 is connected to the anode of the diode D4, the cathode of the diode D4 is the output terminal of the charging device connected to the input terminal of the charging device, and the resistor R2 and the resistor R3 are connected in series to the output of the switching power supply chip U3 Between the terminal VOUT and the ground, the common connection terminal of the resistor R2 and the resistor R3 is connected to the feedback terminal FB of the switching power supply chip U3, and the capacitor C5 is connected between the output terminal VOUT of the switching power supply chip U3 and the ground . 3. The single-port charging device according to claim 1 or 2, wherein the switch tube is a MOS tube Q1, the gate of the MOS tube Q1 is the control terminal of the switch tube, and the drain of the MOS tube Q1 is The first end of the switch tube, the source of the MOS transistor Q1 is the second end of the switch tube. 4. The single-port charging device according to claim 1, wherein the charging device input terminal and the charging device output terminal are the same port. 5. The single-port charging device according to claim 1, wherein the reset monitor U1 adopts an APX809 chip.