TW201338344A - Charging source detection switch apparatus - Google Patents

Abstract

A charging source detection switch apparatus for s having a detecting switch unit and a control unit is provided. According to the coupling situation between a first voltage source, a second voltage source a first and a second input port, the detecting switch unit outputs the voltage provided by the first voltage source and the second voltage source, wherein the priority of the output voltage of the first voltage source is higher than the priority of the output of the second voltage source. The control unit controls the detecting switch unit to give conducting path to the first voltage source and the second voltage while the charging source detection switch apparatus at a fast charging mode.

Description

Charging source detection switching device

The present invention relates to an electronic device, and more particularly to a charging source detecting switching device.

With the rapid development of the digital 3C industry, the development of electrical products such as mobile phones, digital cameras, digital cameras, PDAs and portable computers has become more vigorous and popular. However, the battery chargers of the above electrical products are mostly exclusive specifications. Therefore, when the user wants to replace the new model or replace the brand, the original battery charger will not be able to continue to be used, which will not only cause waste of resources, but also let The user's burden is increased and the environment is twice polluted.

Further, in recent years, in response to environmental protection, the EU has stipulated that all mobile phone chargers must be Micro Universal Serial Bus (Micro USB) chargers, but the power of Micro USB chargers is small. The maximum current limit is 1.5A, which can't meet the charging time requirement of the tablet. Therefore, in order to meet the specifications of their own products, many large manufacturers began to design chargers of their own products to meet the design requirements.

Different consumer products have different charging design methods. There are two ways to solve the problem of product interoperability. The first is to wait for the safety regulations to be unified and to follow the specifications. The second is to consider the interoperability compatible with other charging methods when designing the product machine, so that consumers can find the charger and extend the use time of the electronic product at any time. However, this does not simplify the design of the product, which increases the cost and reduces the safety of the system and increases the problem.

The invention provides a charging source detecting switching device, which can make the electronic device applying the charging source detecting switching device compatible with charging voltage sources of different specifications.

An embodiment of the invention provides a charging source detection switching device. The charging source detecting switching device has a first input port and a second input port, respectively configured to couple the first voltage source and the second voltage source. The charging source detecting switching device includes a detecting switching unit and a control unit. The detecting switching unit is coupled to the first input port and the second input port, and the control unit is coupled to the detecting switching unit.

In this embodiment, the detecting switching unit outputs the voltages provided by the first voltage source and the second voltage source according to the coupling condition of the first and second voltage sources and the first and second input ports, wherein the first voltage source The output priority is higher than the second voltage source. The control unit outputs a fast charge control signal when the charge source detection switching device is in the fast charge mode, to control the detection switching unit to simultaneously turn on the charging paths of the first voltage source and the second voltage source.

In an embodiment of the invention, the detecting switching unit includes a switching unit coupled to the first input port and the second input port, and the switching unit outputs the first voltage source or the second voltage source.

In an embodiment of the invention, the switching unit includes a diode, a P-type transistor, and a first resistor. The anode of the diode is adapted to be coupled to the first input port, and the cathode of the diode is coupled to the output of the charging source detecting switching device. The gate and the source of the P-type transistor are respectively coupled to the anode and the cathode of the diode, and the drain of the P-type transistor is coupled to the second input port. The first resistor is coupled between the gate of the P-type transistor and the ground.

In an embodiment of the invention, the switching unit includes a detecting unit and a switching unit. The detecting unit is coupled to the output of the charging source detecting switching device, and detects the output of the charging source detecting switching device, and generates a specification signal according to the output of the charging source detecting switching device, wherein the specification signal indicates the charging source detection switching The specification of the voltage output by the device. The switch unit is coupled between the second input port and the output of the charge source detecting switching device, and the conduction state of the switch unit is controlled by the control unit.

In an embodiment of the invention, when the charging source detection switching device is in the fast charging mode, the control unit outputs a fast charging control signal to turn on the switching unit.

In an embodiment of the invention, the switching unit is a transistor.

In an embodiment of the invention, the detecting unit includes a voltage regulator, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first comparator, a second comparator, and a third comparator. The voltage regulator is coupled to the output of the charging source detecting switching device, and generates a first reference voltage, a second reference voltage, and a third reference voltage according to the voltage of the charging source detecting switching device output. The second to fifth resistors are connected in series between the output of the charging source detecting switching device and the ground. The positive input terminal of the first comparator is coupled to the first reference voltage, and the negative input terminal of the first comparator is coupled to the common contact of the second resistor and the third resistor. The positive input terminal of the second comparator is coupled to the second reference voltage, and the negative input terminal of the second comparator is coupled to the common contact of the third resistor and the fourth resistor. The positive input end of the third comparator is coupled to the third reference voltage, the negative input end of the third comparator is coupled to the common contact of the fourth resistor and the fifth resistor, and the output ends of the first to third comparators output the specification signal .

In an embodiment of the invention, the charging source detection switching device further includes a first voltage protection circuit and a second voltage protection circuit. The first voltage protection circuit is coupled between the first input port and the detecting switching unit to determine whether the voltage provided by the first voltage source falls within the first preset voltage range to determine whether the first voltage source is provided. The voltage is output to the detection switching unit. The second voltage protection circuit is coupled between the second input port and the detecting switching unit to determine whether the voltage provided by the second voltage source falls within the second preset voltage range to determine whether the second voltage source is provided. The voltage is output to the detection switching unit.

An embodiment of the present invention provides a charging source detection switching method for a charging source detection switching device. The charging source detecting switching device has a first input port and a second input port, respectively adapted to be coupled to a first A voltage source and a second voltage source. The charging source detection switching method includes: detecting a coupling condition between the first and second voltage sources and the first and second input ports; and outputting according to the coupling condition of the first and second voltage sources and the first and second input ports a voltage provided by the first voltage source and the second voltage source, wherein an output priority of the first voltage source is higher than the second voltage source; determining whether the charging source detects whether the switching device is in a fast charging mode; and if the charging source detects switching The device is in a fast charge mode while turning on the charging path of the first voltage source and the second voltage source.

In an embodiment of the present invention, the charging source detection switching method further includes: detecting an output of the charging source detecting switching device; and generating a specification signal according to the output of the charging source detecting switching device, wherein the specification signal indicates charging source detection The specification of the voltage output by the switching device is measured.

In an embodiment of the present invention, the charging source detection switching method further includes detecting whether a voltage specification of the first and second voltage sources coupled to the first and second input ports falls within a corresponding preset voltage range thereof. In order to determine whether to use the first and second voltage sources as charging power sources.

Based on the above, the charging source detection switching device according to an embodiment of the present invention can detect the coupling between the first and second voltage sources and the first and second input ports, and selectively output the first And the voltage provided by the second voltage source. Further, when the charging source detecting switching device enters the fast charging mode, the control unit may control the detecting switching unit to simultaneously turn on the charging paths of the first and second voltage sources to speed up the charging speed.

The above described features and advantages of the present invention will be more apparent from the following description.

FIG. 1A is a schematic diagram of an electronic system for applying a charging source detection switching device according to an embodiment of the present invention. The electronic system includes a charging source detection switching device 100, a charging chip 170, a battery 180, and an electronic device 190. The charging source detection switching device 100 is coupled to the charging chip 170 , and the charging chip 170 is coupled to the battery 180 and the electronic device 190 . The charging source detection switching device 100 has a first input port 110 and a second input port 120, respectively adapted to couple the first voltage source and the second voltage source. The charging source detection switching device 100 includes a detection switching unit 130 and a control unit 140. The detection switching unit 130 is coupled to the first input port 110 and the second input port 120, and the control unit 140 is coupled to the detection switching unit 130.

In this embodiment, the detection switching unit 130 outputs the voltages provided by the first voltage source and the second voltage source according to the coupling conditions of the first and second voltage sources and the first and second input ports 110 and 120, wherein The output of the first voltage source has a higher priority than the second voltage source. For example, the first voltage source can be, for example, an AC transformer, and the second voltage source can be, for example, a USB power supply. The specification of the AC transformer can be, for example, a voltage source of 9 to 19 volts and provides a current of 1.5 amps to 4.7 amps, and the USB power supply can be, for example, a 5 volt voltage source and provides 1.5 amps of current. In contrast, the first and second input ports 110, 120 can be, for example, a direct current (DC) circular hole or a universal serial bus (USB). It should be noted that the voltage source and the input part are only an exemplary embodiment, and the present invention is not limited thereto, and the number and type of the input 埠 and the voltage source can be adjusted according to the needs of the designer.

In addition, the control unit 140 outputs a fast charge control signal F when the charge source detection switching device 100 is in the fast charge mode, to control the detection switching unit 130 to simultaneously turn on the charging paths of the first voltage source and the second voltage source. In other words, by detecting the switching unit 130 to detect and switch the voltages provided by the first and second voltage sources, the charging source detecting switching device of the embodiment can make the charging chip 170 according to the detecting switching unit 130. The output voltage charges the battery 180, thereby enabling the electronic device 190 to be simultaneously compatible with voltage sources of different specifications, and enabling the electronic device 190 to be charged in the most efficient manner.

The detection switching unit 130 of the embodiment may include a switching unit 132, a detecting unit 134, and a switching unit 136. The switching unit 132 is coupled to the first input port 110 and the second input port 120 for outputting a voltage provided by the first voltage source or the second voltage source. The first voltage or the second voltage output by the switching unit 132 can charge the battery 180 through the charging chip 170 and supply power to the electronic device 190.

Furthermore, the switching unit 132 can be further designed such that the output of the first voltage source is prioritized over the output of the second voltage source. For example, when the second voltage source is first coupled to the detection switching unit 130, if the first voltage source is coupled to the switching unit detection switching unit 130, the switching unit 132 switches the charging path to the first A voltage source to switch the output of the second voltage source to the output of the first voltage source. Alternatively, when the first and second voltage sources are simultaneously coupled to the detection switching unit 130, the switching unit 132 selects a charging path to the first voltage source to output the voltage provided by the first voltage source. In this way, the charging source detection switching device 100 of the embodiment can switch the appropriate charging path, and then select the most efficient charging power source to charge the battery 180 through the charging chip 170.

In addition, the detecting unit 134 is coupled to the output of the charging source detecting switching device 100 to detect the output of the charging source detecting switching device 100, and generates a specification signal S according to the output of the charging source detecting switching device 100, wherein the specification The signal S indicates the specification of the voltage output by the charging source detecting switching device 100. Specifically, the detecting unit 134 is configured to determine the specifications of the first and second voltage sources, and notify the charging chip 170 of the specification signal S. Thus, the charging chip 170 can know the range and size of the charging current.

In addition, the switch unit 136 is coupled between the second input port 120 and the output of the charge source detecting switching device 100, and the conduction state of the switch unit 136 is controlled by the control unit 140. In this embodiment, the switching unit 132 preferentially outputs the first voltage source when the first and second voltage sources are coupled to the charging source detection switching device 100, that is, the preset switching unit 130 is detected. The situation is to provide a single source of charging. If the user wants to speed up the charging, the detecting switching device 100 can enter the fast charging mode, that is, the control unit 140 outputs a fast charging control signal F to turn on the charging path of the second voltage source by the switching unit 136, so that the second The voltage of the voltage source can also be output to the charging wafer 170, so that the electronic device 190 can be compatible with voltage sources of different specifications, and the charging efficiency of the battery 180 can be improved.

The following will give an example of the operation of the detection switching unit of FIG. 1A. Table 1 shows the detection switching behavior exhibited by the detection switching unit.

Referring to Table 1, Table 1 shows the coupling and output situations of the power detection switching device 100 for the first voltage source and the second voltage source. In this example, the second voltage source is a 5 volt voltage source and is coupled to the charge source detection switching device 100 via a Universal Serial Bus (USB). The first voltage source is a general AC transformer, and provides a voltage of, for example, 9 volts to 19 volts, and is coupled to the charging source detecting switching device 100 through a DC circular hole. When only the first voltage source or the second voltage source is coupled to the first input port 110 or the second input port 120, the switching unit 132 in the detecting switching unit 130 may output the voltage of the first voltage source or the second voltage source. The voltage of the second voltage source can also be output through the conduction switch unit 136. When the first voltage source and the second voltage source are simultaneously coupled to the detection switching unit 130, the voltage of the first voltage source is preferentially output, and when fast charging is to be used, the switching unit 136 can be turned on to make the second voltage source The voltage is output simultaneously with the voltage of the first voltage element.

Referring to FIG. 1A , in order to protect the charged electronic device 190 and avoid an improper charging source from providing an excessive charging current, the charging source detecting switching device 100 may further include a first voltage protection circuit 150 and a second voltage protection circuit 160 . .

The first voltage protection circuit 150 is coupled between the first input port 110 and the detection switching unit 130, and determines whether the voltage provided by the first voltage source falls within the first preset voltage range to determine whether the first The voltage supplied from the voltage source is output to the detection switching unit 130. Similarly, the second voltage protection circuit 160 is coupled between the second input buffer 120 and the detection switching unit 130, and determines whether the voltage provided by the second voltage source falls within the second preset voltage range to determine whether The voltage provided by the second voltage source is output to the detection switching unit 130. The first preset voltage and the second preset voltage are associated with a used voltage specification of the electronic device 190 being charged. In other words, after the first voltage source and the second voltage protection circuit 160 determine whether the range of the preset voltage is met, the detection unit 134 determines the specification and outputs the voltage to the charging chip 170.

FIG. 1B is a block diagram of a charging source detection switching device according to another embodiment of the present invention. The charge source detection switching device 100A of FIG. 1B is similar to the charge source detection switching device 100 of FIG. 1A, and therefore the same elements are denoted by the same reference numerals. The main difference between the charging source detection switching device 100A of the present embodiment and the charging source detection switching device 100 of FIG. 1A is that in the embodiment, the detecting switching unit 130A includes a detecting unit 134 and a switching unit 136. The detection switching unit 130A can presetly output the voltage of the first voltage source, and the voltage of the second voltage source can be outputted or not output through the conduction condition of the switching unit 136. Since the operation of the detecting unit 134 and the switching unit 136 has been described in the embodiment of FIG. 1A, details are not described herein again.

2A is a circuit diagram of a charging source detection switching device of the embodiment of FIG. 1A. Please refer to Figure 2A. In this embodiment, the switching unit 132 is a transistor, such as a PNP transistor or an NPN transistor. The switching unit 132 includes a diode D1, a P-type transistor U1, and a first resistor R1. The anode of the diode D1 is coupled to the first voltage protection circuit 150, and the cathode of the diode D1 is coupled to the output of the charging source detection switching device 200A. The gate and the source of the P-type transistor U1 are respectively coupled to the anode and the cathode of the diode D1, and the drain of the P-type transistor U1 is coupled to the second input port 120 through the second voltage protection circuit 160. The first resistor R1 is coupled between the gate of the P-type transistor U1 and the ground. When the first voltage source and the second voltage source are coupled to the charging source detection switching device 200A simultaneously or sequentially, the voltage output of the first voltage source is controlled to be higher than the second voltage by the conduction state of the P-type transistor U1. The voltage output of the source (in the embodiment, the voltage provided by the first voltage source is greater than the voltage provided by the second voltage source, the first voltage source may be, for example, an AC transformer, and the second voltage source may be, for example, a USB power supply).

The detecting unit 134 includes a voltage regulator T1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first comparator C1, a second comparator C2, and a third comparator C3. The regulator T1 is coupled to the output of the charging source detecting switching device 200A, and generates a first reference voltage, a second reference voltage, and a third reference voltage according to the voltage output by the charging source detecting switching device 200A. The second to fifth resistors R2 to R5 are connected in series between the output of the charge source detecting switching device 200A and the ground. The positive input terminal of the first comparator C1 is coupled to the first reference voltage, and the negative input terminal of the first comparator C1 is coupled to the common contact of the second resistor R2 and the third resistor R3. The positive input terminal of the second comparator C2 is coupled to the second reference voltage, and the negative input terminal of the second comparator C2 is coupled to the common contact of the third resistor R3 and the fourth resistor R4. The positive input terminal of the third comparator C3 is coupled to the third reference voltage, and the negative input terminal of the third comparator C3 is coupled to the common contact of the fourth resistor R4 and the fifth resistor R5, and the first to third comparators C1~ The output of C3 outputs the specification signal S.

In addition, the first voltage protection circuit 150 and the second voltage protection circuit 160 of the embodiment are respectively composed of a comparator, a transistor, a voltage dividing circuit (consisting of two resistors), and a voltage regulator. The coupling relationship is shown in Figure 2A. Since the implementation is well known to those of ordinary skill in the art, the coupling relationship and actuation thereof will not be described herein.

Specifically, when the first voltage source is coupled to the first input port 110 and the second input port 120 is not coupled to the second voltage source, if the voltage provided by the first voltage source falls within the first preset voltage range The first voltage protection circuit 150 outputs the voltage provided by the first voltage source. At this time, the P-type transistor U1 is turned off due to the increase of the gate voltage thereof, so that the diode D1 is turned on (so that the anode voltage of the diode D1 is greater than the cathode voltage), so that the charging source detection switching device 200A outputs the first. The voltage provided by the voltage source.

Similarly, when the first voltage source and the second voltage source are respectively coupled to the first input port 110 and the second input port 120, if the voltages provided are respectively falling between the first preset voltage range and the second preset voltage, respectively Within the range, the P-type transistor U1 will also be in a closed state (because its gate voltage is pulled high by the voltage provided by the first voltage source), so the charging source detection switching device 200A will also output the first voltage source at this time. The voltage supplied. It should be noted that, if the charging source detecting switching device 200A is in the fast charging mode at this time, the control unit 140 turns on the switching unit 136 so that the voltage provided by the second voltage source can also reach the charging chip 170, thereby improving the charging efficiency. .

In addition, when the first voltage source is not coupled to the first input port 110 and the second input port 120 is coupled to the second voltage source, if the voltage provided by the second voltage source falls within the second predetermined voltage range, Then, the second voltage protection circuit 160 outputs the voltage provided by the second voltage source. At this time, the P-type transistor U1 is in a conducting state because its gate is not applied with a voltage. Therefore, the voltage supplied by the second voltage source can be output to the charging wafer 170 via the P-type transistor U1. At this time, the diode D1 can prevent the voltage provided by the second voltage source from being inverted to the first voltage protection circuit 150 and affect the output voltage value of the charging source detection switching device 200A.

In addition, the specification signal S output by the detecting unit 134 of the embodiment may indicate three different specifications. As shown in FIG. 2A, the voltage outputted by the charge source detecting switching device 200A can be regulated by the voltage regulator T1 to provide reference voltages of three different voltage values (for example, 5 volts (V) / 0.5 amps as shown in FIG. 2A. (A), 9V/1.5A and 12V/3A). In addition, the voltage dividing circuit formed by the second resistor R2, the third resistor R3, the fourth resistor R4, and the fifth resistor R5 can divide the voltage output by the charging source detecting switching device 200A, and then provide the voltage to the first A comparator C1, a second comparator C2, and a third comparator C3 have different partial voltages at the negative input terminals. Thus, by determining the output voltage level of the first comparator C1, the second comparator C2, and the third comparator C3, the voltage specification output by the charging source detection switching device 200A can be known.

2B is a circuit diagram of the charging source detection switching device of the embodiment of FIG. 1B. Please refer to Figure 2B. The difference between the charging source detection switching device 200B of the present embodiment and the charging source detection switching device 200A of FIG. 2A is that the output of the first voltage protection circuit 150 of the embodiment is directly coupled to the charging source detection switching device 200B. The output is output, and the output of the first voltage protection circuit 150 is only coupled to the switch unit 136.

As shown in FIG. 2B, it is assumed that the voltages provided by the first voltage source and the second voltage source fall within the first predetermined voltage range and the second preset voltage range, respectively. When the first voltage source is coupled to the first input port 110 and the second input port is not coupled to the second voltage source 120, the voltage provided by the first voltage source is directly output. When the first voltage source and the second voltage source are respectively coupled to the first input port 110 and the second input port 120, if the charging source detection switching device 200A is not in the fast charging mode, the control unit 140 can turn off the switch. The unit 136 causes the charging source detection switching device 200B to preferentially output the voltage provided by the first voltage source. Conversely, if the charging source detection switching device 200A is in the fast charging mode, the control unit 140 can turn on the switching unit 136 so that the voltages provided by the first and second voltage sources can reach the charging chip 170, thereby improving charging. effectiveness. In addition, when the first voltage source is not coupled to the first input port 110 and the second input port 120 is coupled to the second voltage source, the switch unit 136 can be turned on by the control unit 140 to provide the second voltage source. The voltage can reach the charging wafer 170.

FIG. 3A is a flowchart of a charging source detection switching method according to an embodiment of the present invention. Referring to FIG. 3A, the charging source detection switching method 3000A of the charging source detection switching device may include the following steps: detecting a coupling condition between the first and second voltage sources and the first and second input ports 110 and 120. (S3100), then, according to the first and second voltage sources and the first and second input port coupling situations 110, 120, the voltages provided by the first voltage source and the second voltage source are output (S3200), wherein the first The output of the voltage source has a higher priority than the second voltage source. Then, it is determined whether the charging source detecting switching device 100 is in the fast charging mode (S3300). If the charging source detecting switching device 100 is in the fast charging mode, the charging paths of the first voltage source and the second voltage source are simultaneously turned on (S3400).

FIG. 3B is a flowchart of a charging source detection switching method according to another embodiment of the present invention. In the embodiment and the embodiment of Fig. 3A, the main differences between the two are as follows. In detail, the charging source detection switching method 3000B of the embodiment further includes detecting the output of the charging source detection switching device 100 (S3220), and generating a specification signal according to the output of the charging source detecting switching device 100 (S3240). The specification signal indicates the specification of the voltage output by the charging source detecting switching device 100. In addition, before the first and second voltage sources are coupled to the first and second input ports 110, 120 to output the voltages provided by the first voltage source and the second voltage source, the charging source detection switching method 3000B further includes Detecting whether the voltage specifications of the first and second voltage sources coupled to the first and second input ports fall within a corresponding preset voltage range (S3150) to determine whether to make the first and second voltage sources For charging power.

In summary, the charging source detection switching device according to an embodiment of the present invention can detect and switch between the first and second voltage sources, and selectively output the voltages provided by the first and second voltage sources. . Further, when the charging source detecting switching device is in the fast charging mode, the control unit may control the detecting switching unit to simultaneously turn on the charging paths of the first and second voltage sources to speed up the charging speed. Therefore, the electronic device using the charging source detection switching device of the embodiment of the present invention can be compatible with charging voltage sources of different specifications, and can further make different voltage sources become charging sources at the same time, thereby increasing charging efficiency.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 100A, 200A, 200B. . . Charging source detection switching device

110. . . First input埠

120. . . Second input埠

130. . . Detection switching unit

132. . . Switching unit

134. . . Detection unit

136. . . Switch unit

140. . . control unit

150. . . First voltage protection circuit

160. . . Second voltage protection circuit

170. . . Charging chip

180. . . battery

190. . . Electronic device

C1. . . First comparator

C2. . . Second comparator

C3. . . Third comparator

D1. . . Dipole

R1. . . First resistance

R2. . . Second resistance

R3. . . Third resistance

R4. . . Fourth resistor

R5. . . Fifth resistor

T1. . . Stabilizer

U1. . . P-type transistor

F. . . Fast charge control signal

S. . . Specification signal

3000A, 3000B. . . method

S3100, S3150, S3200, S3220, S3240, S3300, S3400. . . step

1A is a block diagram of a charging source detection switching device according to an embodiment of the present invention.

FIG. 1B is a block diagram of a charging source detection switching device according to another embodiment of the present invention.

2A is a circuit diagram of the charging source detection switching device of FIG. 1A.

2B is a circuit diagram of the charging source detection switching device of FIG. 1B.

FIG. 3A is a flowchart of a charging source detection switching method according to an embodiment of the present invention.

FIG. 3B is a flowchart of a charging source detection switching method according to an embodiment of the present invention.

100. . . Charging source detection switching device

110. . . First input埠

120. . . Second input埠

130. . . Detection switching unit

132. . . Switching unit

134. . . Detection unit

136. . . Switch unit

140. . . control unit

150. . . First voltage protection circuit

160. . . Second voltage protection circuit

170. . . Charging chip

180. . . battery

190. . . Electronic device

F. . . Fast charge control signal

S. . . Specification signal

Claims (11)

A charging source detecting switching device has a first input port and a second input port, respectively adapted to be coupled to a first voltage source and a second voltage source, the charging source detecting switching device comprising: a detecting The switching unit is coupled to the first input port and the second input port, and outputs the first voltage source and the second voltage according to the coupling condition of the first and second voltage sources and the first and second input ports a voltage provided by the source, wherein the first voltage source has an output priority higher than the second voltage source; and a control unit is coupled to the detection switching unit, when the charging source detects that the switching device is in the fast charging mode A fast charge control signal is output to control the detection switching unit to simultaneously turn on the charging path of the first voltage source and the second voltage source. The charging source detection switching device of claim 1, wherein the detecting switching unit comprises: a switching unit coupled to the first input port and the second input port, outputting the first voltage source or The second voltage source. The charging source detecting switching device of claim 2, wherein the switching unit comprises: a diode, the anode is adapted to be coupled to the first input port, and the cathode of the diode is coupled to the charging An output of the source detecting switching device; a P-type transistor having a gate and a source respectively coupled to the anode and the cathode of the diode, a drain of the P-type transistor coupled to the second input port; and a The first resistor is coupled between the gate of the P-type transistor and the ground. The charging source detection switching device of claim 1, wherein the detecting switching unit comprises: a detecting unit coupled to the output of the charging source detecting switching device to detect the charging source detecting switching The output of the device generates a specification signal according to the output of the charging source detecting switching device, wherein the specification signal indicates the specification of the voltage output by the charging source detecting switching device; and a switch unit coupled to the second Between the input port and the output of the charging source detecting switching device, the conduction state of the switching unit is controlled by the control unit. The charging source detecting switching device according to claim 4, wherein when the charging source detecting switching device is in the fast charging mode, the control unit outputs the fast charging control signal to turn on the switching unit. The charging source detecting switching device according to claim 4, wherein the switching unit is a transistor. The charging source detection switching device of claim 4, wherein the detecting unit comprises: a voltage regulator coupled to the output of the charging source detecting switching device, and the switching device is detected according to the charging source The output voltage generates a first reference voltage, a second reference voltage, and a third reference voltage; a second resistor; a third resistor; a fourth resistor; a fifth resistor, the second to fifth resistor string Connected between the output of the charging source detecting switching device and the ground; a first comparator having a positive input coupled to the first reference voltage, a negative input of the first comparator coupled to the second resistor, a common junction of the third resistor; a second comparator having a positive input coupled to the second reference voltage, and a negative input coupled to the common junction of the third resistor and the fourth resistor; And a third comparator, the positive input terminal is coupled to the third reference voltage, and the negative input terminal of the third comparator is coupled to the common contact of the fourth resistor and the fifth resistor, the first to third comparison The output of the device outputs the specification signal. The charging source detecting switching device of claim 1, further comprising: a first voltage protection circuit coupled between the first input port and the detecting switching unit to determine the first voltage source Whether the voltage provided falls within a first predetermined voltage range to determine whether to output the voltage provided by the first voltage source to the detection switching unit; and a second voltage protection circuit coupled to the first Between the two input ports and the detection switching unit, determining whether the voltage provided by the second voltage source falls within a second predetermined voltage range to determine whether to output the voltage provided by the second voltage source to the Detect switching unit. A charging source detection switching method is applicable to a charging source detecting switching device. The charging source detecting switching device has a first input port and a second input port, respectively adapted to be coupled to a first voltage source and a The second voltage source, the charging source detecting switching method includes: detecting a coupling condition between the first and second voltage sources and the first and second input ports; and according to the first and second voltage sources and the first a second input port coupled to output a voltage provided by the first voltage source and the second voltage source, wherein the output priority of the first voltage source is higher than the second voltage source; determining the charging source Measuring whether the switching device is in the fast charging mode; and if the charging source detecting switching device is in the fast charging mode, simultaneously turning on the charging path of the first voltage source and the second voltage source. The charging source detection switching method of claim 9, further comprising: detecting an output of the charging source detecting switching device; and generating a specification signal according to the output of the charging source detecting switching device, wherein the The specification signal indicates that the charging source detects the specification of the voltage output by the switching device. The charging source detection switching method of claim 9, further comprising: detecting whether a voltage specification of the first and second voltage sources coupled to the first and second input ports falls within a corresponding Within the preset voltage range, to determine whether to use the first and second voltage sources as charging power sources.