TWI638500B - Charging apparatus and cable and e-marker chip threreof - Google Patents

Abstract

A charging device and cable and electronic tag wafer thereof. Sensing the temperature of the cable and the voltage of the power busbar in the cable by at least one of the chips in the connector, and providing the temperature sensing signal and the voltage sensing signal to the charger so that the charger can be temperature dependent The sensing signal and the voltage sensing signal adjust the charging voltage at least one of them.

Description

Charging device and cable and electronic tag chip

This invention relates to an electronic device, and more particularly to a charging device and cable and electronically labeled wafer therefor.

With the rapid development of technology, mobile electronic devices such as smart phones and tablets have gradually played an indispensable role in people's lives. For mobile electronic devices, charging has always been a problem that cannot be avoided. Recently, more and more mobile electronic devices have provided functions to support fast charging, so that the power supply terminal can charge the mobile electronic device in a more efficient manner. In general, fast charging is achieved by providing a higher charging voltage or a larger charging current by the charging circuit. However, a large charging current also has a risk, for example, the equivalent resistance of the connector of the charging cable may be worn. When it becomes larger, the temperature of the charging cable is increased, and the probability of damage of the electronic component is increased, resulting in insufficient safety of the charging device.

The invention provides a charging device and a cable and an electronic marking wafer thereof, which can effectively reduce the probability of damage of electronic components caused by large charging current and improve the safety of use of the charging device.

The cable of the present invention includes a power bus and a connector. One end of the cable is used to couple the charger and the other end of the cable provides a charging voltage to the electronic device through the connector. The connector includes a wafer disposed in the connector to sense at least one of a temperature of the cable and a voltage of the power bus. The chip includes a storage circuit for storing a temperature sensing signal generated by the temperature of the wafer sensing cable and a voltage sensing signal generated by the voltage of the chip sensing power bus, and the temperature sensing signal and the voltage are transmitted through the data transmission pin. At least one of the sensing signals is transmitted to the charger and the electronic device.

At least one of the temperature of the electronic tag (E-Marker) wafer sensing cable of the present invention and the power bus bar voltage in the cable, the electronic tag wafer includes a storage circuit and a data transfer pin. The storage circuit is configured to store a temperature sensing signal generated by the temperature of the electronically labeled wafer sensing cable and a voltage sensing signal generated by the electronically labeled wafer sensing power supply bus bar voltage. The data transmission pin is configured to transmit at least one of the temperature sensing signal and the voltage sensing signal to the charger or the electronic device.

The charging device of the present invention includes a charger, a cable, and a connector. The cable includes a power bus. One end of the cable is coupled to the charger and the other end of the cable is supplied with a charging voltage to the electronic device through the connector. The connector includes a wafer disposed in the connector to sense at least one of a temperature of the cable and a voltage of the power bus. The chip includes a storage circuit for storing a temperature sensing signal generated by the temperature of the wafer sensing cable and a voltage sensing signal generated by the voltage of the chip sensing power bus, and the temperature sensing signal and the voltage are transmitted through the data transmission pin. At least one of the sensing signals is transmitted to the charger.

Based on the above, the embodiment of the present invention senses the temperature of the cable and the voltage of the power busbar in the cable by at least one of the wafers in the connector, and provides the temperature sensing signal and the voltage sensing signal to the charger. Therefore, the charger can adjust the charging voltage according to at least one of the temperature sensing signal and the voltage sensing signal to avoid the probability of damage to the electronic component caused by the large charging current, and improve the safety of use of the charging device.

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

1 is a schematic view of a charging device in accordance with an embodiment of the present invention, with reference to FIG. The charging device includes a charger 102, a connector 104, and a cable 106. One end of the cable 106 is coupled to the charger 102, and the other end of the cable 106 is connected to the connector 104 to provide a charging voltage VT1 to an electronic device (not shown). The electronic device can be, for example, a mobile phone, a lithographic computer, a music player, etc. Further, the cable 108 includes a power bus bar VBUS, the connector 104 includes a wafer 108, and the chip 108 is coupled to a power bus bar VBUS, wherein the chip 108 can be, for example, an electronic tag (E-Marker) chip, and the connection interface of the connector 104 For example, it can be a USB type-C interface, but not limited thereto. The wafer 108 can sense at least one of the temperature of the cable 106 and the voltage of the power bus bar VBUS, and sense the temperature sensing signal generated by the temperature of the sensing cable 106 and the voltage generated by the voltage of the sensing power bus bar VBUS. The signal is stored in the storage circuit 110 in the memory 108. The storage circuit 110 can be implemented by, for example, a static random access memory (SRAM), but not limited thereto. The storage circuit 110 can transmit at least one of the temperature sensing signal and the voltage sensing signal to the charger 102 through the data transmission pin P1, and the charger 102 can change the application according to at least one of the temperature sensing signal and the voltage sensing signal. To the voltage of the power bus VBUS, and then adjust the charging voltage VT1 or stop charging, wherein the data transmission pin P1 can be, for example, a configuration channel (Configuration Channel, CC) pin, but not limited thereto.

Thus, by providing at least one of the temperature of the cable 108 in the connector 104 and the voltage of the power bus bar VBUS to the charger, the charger 102 can immediately respond to the temperature sensing signal and the voltage sensing signal. At least one of the charging voltages VT1 is adjusted or the charging is stopped. For example, the temperature sensing signal and the voltage sensing signal can be used to determine whether the equivalent resistance between the electronic device and the connector of the cable 106 is increased due to wear or other reasons (for example, When the temperature corresponding to the temperature sensing signal is too high, or the voltage corresponding to the voltage sensing signal is too low, the equivalent resistance between the connector of the electronic device and the cable 106 is too large). When the equivalent resistance of the connector of the cable 106 becomes large, the charger 102 can reduce application to the power busbar VBUS, or stop supplying voltage to the power busbar VBUS (eg, the temperature of the cable 106 is higher than a preset temperature or electron) When the equivalent resistance between the device and the connector of the cable 106 is greater than the preset resistance, the voltage supply to the power busbar VBUS is stopped to avoid the temperature of the cable 106 being too high, and the probability of damage of the electronic component is greatly reduced, and the charging device is improved. The security of use.

2 is a schematic diagram of a charging device according to another embodiment of the present invention. Please refer to FIG. 2. Further, the wafer 108 can include a thermal sensor 202 and an analog to digital circuit 204 that can sense the temperature of the cable 106 to generate a temperature sensing signal. The analog digital conversion circuit 204 is coupled to the thermal sensor 202 and the storage circuit 110. The analog digital conversion circuit 204 can convert the temperature sensing signal into a digital signal and store the temperature sensing signal converted into the digital signal to the storage circuit 110. In the present embodiment, the thermal sensor 202 is implemented by the thermistor RT1 and the resistor R. The thermistor RT1 is coupled between the power bus bar VBUS and one end of the resistor R, wherein the other end of the resistor R is coupled. At the ground terminal, the thermistor RT1 can be, for example, a positive temperature coefficient or a negative temperature coefficient thermistor. In addition, the analog digital conversion circuit 204 can convert the voltage across the thermistor RT1 (ie, the temperature sensing signal) into a digital signal and store it in the storage circuit 110 for access by the charger 102. In this embodiment, the charger 102 can include an AC-DC conversion circuit 206 and a power transmission control chip 208. The AC-DC conversion circuit 206 is coupled to the power bus bar VBUS and the power transmission control chip 208. The power transmission control chip 208 is further coupled to the chip 108. . The AC to DC conversion circuit 206 can convert the AC voltage to a DC voltage to provide a charging voltage VT1 to the electronic device. The power transmission control chip 208 can extract at least one of the temperature sensing signal and the voltage sensing signal from the storage circuit 110 through the data transmission pin P1 of the wafer 108, and adjust the communication according to at least one of the temperature sensing signal and the voltage sensing signal. The charging voltage VT1 provided by the DC conversion circuit 206 stops charging to avoid the possibility of damage to the electronic components caused by the large charging current, and improves the safety of use of the charging device. In another embodiment, the thermistor RT1 can also be located outside of the wafer 108.

It should be noted that the cable 106 of the embodiment of FIG. 1 and FIG. 2 is fixedly connected to the charger 102, so that it only includes a connector 104 for coupling with the electronic device, but in some embodiments The cable 106 can also include two connectors, and the two connectors are not limited to necessarily be fixedly coupled to the charger 102 or the electronic device. For example, FIG. 3 is a schematic diagram of a charging device according to another embodiment of the present invention. Please refer to FIG. 3. The charging device of the present embodiment further includes a connector 302. One end of the cable 106 is coupled to the electronic device (not shown) through the connector 104, and the other end is transmitted through the connector 302. Connected to the charger 102. In this embodiment, the thermistor RT1 is located outside the wafer 108, and the thermal sensor 202 can be implemented in series with the thermistor RT1 and the resistor R1 between the power bus bar VBUS and the ground (which can also be implemented in the embodiment of FIG. 2 In an implementation manner, the analog digital conversion circuit 204 is coupled to a common contact of the thermistor RT1 and the resistor R1 to receive a temperature sensing signal generated at a common junction of the thermistor RT1 and the resistor R1. The connector 302 includes a thermal sensor 306 composed of a thermistor RT2 and a resistor R2, an analog-to-digital conversion circuit 308, and a storage circuit 310. The thermistor RT2 is also located outside the wafer 304, and the connector 302 can transmit data through the wafer 304. The pin P1 transmits the temperature sensing signal generated by the thermal sensor 306 to the charger 102. Similarly, the chip 304 can be, for example, an electronic tag wafer, and the connection interface of the connector 302 can be, for example, a USB type-C interface, and further stored. The circuit 310 can be implemented, for example, as a static random access memory. The data transfer pin P1 of the chip 304 can be, for example, a configuration channel pin. The data transfer pin P1 of the chip 108 is coupled to the data transfer pin P1 of the chip 304. Together. Since the connector 302 has similar components and structures as the connector 104, and the actuation mode is similar to that of the embodiment of FIG. 1 and FIG. 2, the operation mode will not be described herein.

In addition, in some embodiments, the connection interface between the connector 104 and the connector 302 of the embodiment of FIG. 3 may be a USB type-C interface. Due to the USB Type-C specification, when the USB Type-C cable needs to be supported. When the current is 3A or more or the transmission speed of USB 3.1 Gen1/Gen2 is required, the USB Type-C cable needs to have an E-Marker chip built in. Therefore, the connector 104 and the connector 302 in the embodiment of FIG. 3 are USB type. In the case of the -C interface, at least one of the connector 104 and the connector 302 at both ends of the cable is required to be provided with an electronically labeled wafer, that is, at least one of the wafer 108 or the wafer 304 is an electronically labeled wafer. One of the biggest features of the USB Type-C specification is that the connector of the USB Type-C specification can be inserted or reversed into the host device, so that the user inserts or reverses the connector of the USB Type-C interface. Inserted in the charger 102, the charger 102 can charge the mobile phone device through the connector of the USB Type-C interface, thereby improving the convenience of use of the charging device.

4 is a schematic diagram of coupling of an electronic device and a cable connector of a charging device according to an embodiment of the present invention. Please refer to FIG. 4. Further, when the electronic device 402 is connected to the connector 104 of the embodiment of FIG. 1 to FIG. 3, the electronic device 402 can also adjust at least one of the temperature sensing signal and the voltage sensing signal stored in the chip 108. The charging current IG1 is used to further protect the electronic device 402 from damage. In detail, the electronic device 402 can include a power management chip 404. The power pin and the ground pin of the power management chip 404 are respectively coupled to the power bus bar VBUS and the ground pin GND of the chip 108. The power management chip 404 can be based on a voltage sensing signal from the wafer 108 (which indicates the voltage VC1 between the power bus bar VBUS and the ground pin GND sensed by the wafer 108), the charging current IG1 on the power bus bar VBUS, and power management. The voltage VE1 between the power pin and the ground pin of the chip 404 calculates the equivalent connection resistance between the electronic device 402 and the connector 104 (including the equivalent resistance RBUS associated with the power pin and the equivalent resistance RG associated with the ground pin). And adjusting the charging current IG1 received by the electronic device 402 according to the equivalent connection resistance. That is, the resistance value of the equivalent resistance RBUS and the equivalent resistance RG is equal to (VC1-VE1)/IG1, and the power management wafer 404 can be judged according to the calculated equivalent resistance RBUS and the resistance value of the equivalent resistance RG. Whether the equivalent resistance of the connector 104 has become large due to wear or other reasons, and the current value of the received charging current IG1 can be adjusted correspondingly, or the charging is stopped, and the excessive charging current IG1 is prevented from causing the temperature to be too high, and Reduce the chance of damage to electronic components and improve the safety of the charging device. In another embodiment, the power management chip 404 can also determine whether the temperature of the connector 104 is higher than a preset temperature according to the temperature sensing signal from the chip 108. If the preset temperature is exceeded, the power management chip 404 can correspond to The current value of the received charging current IG1 is adjusted, or the charging is stopped.

FIG. 5 is a schematic diagram of a charging device according to another embodiment of the present invention. Please refer to FIG. 5. In this embodiment, the wafer 108 is used to detect the voltage on the power bus bar VBUS. As shown in FIG. 5, the charging device of this embodiment is different from the embodiment of FIG. 2 in that the wafer 108 of the embodiment includes A voltage dividing circuit 502 for detecting the voltage on the power bus bar VBUS. The voltage dividing circuit 502 can include, for example, resistors R3 and R4. The resistors R3 and R4 are connected in series between the power bus bar VBUS and the ground, and divide the voltage on the power bus bar VBUS to generate a divided voltage. The analog-to-digital conversion circuit 204 is coupled to the common junction of the resistor R3 and the resistor R4 to receive the divided voltage generated at the common junction of the resistor R3 and the resistor R4, and converts it into a voltage sensing signal and stores it to the storage circuit 110. For access by the charger 102 or the electronic device 402.

Similarly, although the cable 106 of the embodiment of FIG. 5 includes only one connector 104 for coupling with an electronic device, in some embodiments, the cable 106 may also include two connectors, and the two connections are The head is not limited and must be fixedly connected to the charger 102 or the electronic device. For example, FIG. 6 is a schematic diagram of a charging device according to another embodiment of the present invention. Please refer to FIG. 6. The charging device of the present embodiment further includes a connector 602. One end of the cable 106 is coupled to the electronic device (not shown) through the connector 104, and the other end is connected to the connector 602 through the connector 602. Charger 102. The connector 602 includes a voltage divider circuit 606, an analog digital converter circuit 308, and a memory circuit 310. The wafer 604 can be, for example, an electronic tag wafer. The connection interface of the connector 602 can be, for example, a USB. The type-C interface, the storage circuit 310 can be implemented, for example, in a static random access memory, and the data transfer pin P1 of the chip 604 can be, for example, a configuration channel pin. The data transfer pin P1 of the wafer 108 is coupled to the data transfer pin P1 of the wafer 604. Since the connector 602 has similar components and structures as the connector 104, and the manner of operation is similar to that of the embodiment of FIG. 5, the manner of operation thereof will not be described herein.

FIG. 7 is a schematic diagram of a charging device according to another embodiment of the present invention. Please refer to FIG. 7. In some embodiments, the analog-to-digital conversion circuit 204 of the embodiment of FIG. 5 and FIG. 6 can also be directly coupled to the power busbar VBUS, since the voltage divider circuit is not required to be divided according to the embodiment of FIG. 5 and FIG. Therefore, the requirement for the voltage detection accuracy of the analog digital conversion circuit 308 can be reduced, and the production cost of the wafer in the connector can be saved. The difference between the charging device of the present embodiment and the charging device of FIG. 5 is only the presence or absence of the voltage dividing circuit 502. The detailed operation mode of the charging device of the present embodiment should be inferred from the above embodiments, and thus will not be further described herein.

It should be noted that in some embodiments, the wafer in the connector may also have a voltage dividing circuit and a thermal sensor for temperature sensing of the cable and voltage sensing on the power bus. 8 is a schematic diagram of a charging device according to another embodiment of the present invention. As shown in FIG. 8, the wafer 108 can include a thermal sensor 202 and a voltage dividing circuit 502 for temperature sensing and power supply of the cable 106. The voltage on the bus bar VBUS senses, thereby generating a temperature sensing signal and a voltage sensing signal, and storing it in the storage circuit 110 for access by the charger 102 and the electronic device. Since the implementation of the thermal sensor 202 and the voltage dividing circuit 502 and related operations have been described in the above embodiments, they are not described herein again. Moreover, in other embodiments, the cable 106 of the present embodiment may also include two connectors as in the embodiment of FIGS. 3 and 6, without limiting only one connector as in the embodiment of FIG.

In summary, the embodiment of the present invention senses the temperature of the cable and the voltage of the power bus in the cable by at least one of the wafers in the connector, and provides the temperature sensing signal and the voltage sensing signal to The charger is configured to enable the charger to adjust the charging voltage or stop charging according to at least one of the temperature sensing signal and the voltage sensing signal, to avoid the probability of damage to the electronic component caused by the large charging current, and to improve the safety of use of the charging device. On the other hand, the electronic device connected to the cable can also adjust the charging current received according to the temperature sensing signal and the voltage sensing signal stored in the chip or stop charging to provide further protection.

102‧‧‧Charger

104, 302, 602‧‧‧ connectors

106‧‧‧ cable

108, 304‧‧‧ wafer

110, 310‧‧‧ storage circuit

202, 306‧‧‧ Thermal sensors

204, 308‧‧‧ analog to digital circuit

206‧‧‧AC DC conversion circuit

208‧‧‧Power Transmission Control Wafer

402‧‧‧Electronic devices

404‧‧‧Power Management Wafer

502, 606‧‧ ‧ voltage divider circuit

VT1‧‧‧Charging voltage

VBUS‧‧‧ power bus

P1‧‧‧ data transmission pin

RT1, RT2‧‧‧ Thermistor

R, R1~R6‧‧‧ resistance

IG1‧‧‧Charging current

GND‧‧‧ Grounding Pin

VC1, VE1‧‧‧ voltage

RBUS, RG‧‧‧ equivalent resistance

1 is a schematic diagram of a charging device in accordance with an embodiment of the present invention. 2 is a schematic diagram of a charging device in accordance with another embodiment of the present invention. 3 is a schematic diagram of a charging device in accordance with another embodiment of the present invention. 4 is a schematic diagram of a cable connector coupling of an electronic device and a charging device in accordance with an embodiment of the present invention. FIG. 5 is a schematic diagram of a charging device in accordance with another embodiment of the present invention. FIG. 6 is a schematic diagram of a charging device in accordance with another embodiment of the present invention. FIG. 7 is a schematic diagram of a charging device in accordance with another embodiment of the present invention. FIG. 8 is a schematic diagram of a charging device in accordance with another embodiment of the present invention.

Claims (25)

A cable includes: a power bus; and a connector, one end of the cable is coupled to a charger, and the other end of the cable provides a charging voltage to the electronic device through the connector, the connection The head includes: a chip disposed in the connector, sensing at least one of a temperature of the cable and a voltage of the power bus, the chip comprising: a storage circuit for storing the chip to sense the cable a temperature sensing signal generated by the temperature and a voltage sensing signal generated by the chip sensing the voltage of the power bus, transmitting the temperature sensing signal and the voltage sensing signal to the charging through at least one data transmission pin And the electronic device to cause the charger and the electronic device to change at least one of the voltages applied to the power busbar. The cable of claim 1, wherein the charger for connecting the cable adjusts the charging voltage or stops charging according to at least one of the temperature sensing signal and the voltage sensing signal. The cable of claim 1, wherein the electronic device for connecting the cable adjusts the charging current or stops charging according to at least one of the temperature sensing signal and the voltage sensing signal. The cable of claim 1, wherein the chip further comprises: a thermal sensor that senses a temperature of the cable to generate the temperature sensing signal; A type of analog-to-digital circuit is coupled to the thermal sensor and the storage circuit, converts the temperature sensing signal into a digital signal, and stores the temperature sensing signal converted into a digital signal to the storage circuit. The cable of claim 4, wherein the thermal sensor comprises: a thermistor coupled between the power bus and one end of a resistor, wherein the other end of the resistor is coupled to the At the ground end, the thermistor reacts to the temperature of the cable to generate the temperature sensing signal. The cable of claim 1, wherein the charger for connecting the cable comprises: an AC-DC conversion circuit coupled to the power bus to convert an AC voltage into a DC voltage to Providing the charging voltage; and a power transmission control chip coupled to the AC/DC conversion circuit and the chip, and the temperature sensing signal and the voltage sensing signal are extracted from the storage circuit through the data transmission pin, at least one of And at least one of adjusting the charging voltage provided by the AC-DC converting circuit or stopping charging according to the temperature sensing signal and the voltage sensing signal. The cable of claim 1, wherein the chip further comprises: a voltage dividing circuit coupled to the power bus, dividing the voltage on the power bus to generate a divided voltage, The chip further generates the voltage sensing signal according to the divided voltage. The cable of claim 1, wherein the chip is an electronic tag (E-Marker) chip, the connection interface of the connector is a USB type-C interface, and the data transmission pin is a configuration channel (Configuration Channel , CC) pin. An electronic tag (E-Marker) chip for sensing at least one of a temperature of a cable and a power bus bar voltage in the cable, the electronic tag chip comprising: a storage circuit for storing the The electronically-marked wafer senses a temperature sensing signal generated by the temperature of the cable and the voltage sensing signal generated by the electronic marking wafer sensing the power busbar voltage; and a data transmission pin for sensing the temperature sensing signal And transmitting at least one of the voltage sensing signals to a charger or an electronic device, so that the charger and the electronic device change at least one of the voltages applied to the power bus. The electronically-labeled wafer of claim 9, wherein the electronically-marked wafer is disposed in a first connector, and one end of the cable is used to couple the charger through the first connector. The other end of the cable provides a charging voltage to the electronic device. The electronic tag wafer of claim 10, wherein the charger for connecting the cable adjusts the charging voltage or stops charging according to at least one of the temperature sensing signal and the voltage sensing signal. The electronically labeled wafer of claim 9, wherein the electronically labeled wafer is disposed in a second connector, one end of the cable is used to couple the charger, and the other end of the cable is For providing a charge through the second connector The electrical voltage is applied to the electronic device. The electronic tag wafer of claim 12, wherein the electronic device for connecting the cable adjusts the received charging current or stops according to at least one of the temperature sensing signal and the voltage sensing signal. Charge it. The electronically-labeled wafer of claim 9, wherein the electronically-marked wafer further comprises: a thermal sensor that senses a temperature of the cable to generate the temperature sensing signal; and an analog-to-digital circuit, The thermal sensor and the storage circuit are coupled to convert the temperature sensing signal into a digital signal, and store the temperature sensing signal converted into a digital signal to the storage circuit. The electronically labeled wafer of claim 14, wherein the thermal sensor comprises: a thermistor coupled between the power bus and one end of a resistor, wherein the other end of the resistor is coupled to At a ground terminal, the thermistor reacts to the temperature of the cable to generate the temperature sensing signal. The electronic tag wafer of claim 10, wherein the charger for connecting the cable comprises: an AC-DC conversion circuit coupled to the power bus to convert an AC voltage into a DC voltage, Providing the charging voltage; and a power transmission control chip coupled to the AC-DC conversion circuit and the electronic tag wafer, and the temperature sensing signal is extracted from the storage circuit through the data transmission pin And at least one of the voltage sensing signals and the voltage sensing signal according to the temperature sensing signal at least one of adjusting the charging voltage provided by the AC-DC converting circuit or stopping charging. The electronically-labeled wafer of claim 9, wherein the electronically-marked wafer further comprises: a voltage dividing circuit coupled to the power bus, dividing the voltage on the power bus to generate a partial pressure The voltage, the chip further generates the voltage sensing signal according to the divided voltage. The electronic tag wafer of claim 9, wherein the connection interface of the connector is a USB type-C interface, and the data transmission pin is a configuration channel (CC) pin. A charging device includes: a charger; a cable including a power bus; and a connector, one end of the cable coupled to the charger and providing a charging voltage through the connector at the other end of the cable Providing an electronic device, the connector includes: a chip disposed in the connector, sensing a temperature of the cable and a voltage of the power bus bar, the chip comprising: a storage circuit for storing the The temperature sensing signal generated by the temperature of the cable and the voltage sensing signal generated by the chip sensing the voltage of the power bus, the temperature sensing signal and the voltage sensing signal are transmitted through a data transmission pin Transmitting at least one of the chargers to the charger to enable the charger and the electronic device At least one of them changes the voltage applied to the power bus. The charging device of claim 19, wherein the charger adjusts the charging voltage according to at least one of the temperature sensing signal and the voltage sensing signal. The charging device of claim 19, wherein the chip further comprises: a thermal sensor that senses a temperature of the cable to generate the temperature sensing signal; and an analog-to-digital circuit coupled to the The thermal sensor and the storage circuit convert the temperature sensing signal into a digital signal, and store the temperature sensing signal converted into a digital signal to the storage circuit. The charging device of claim 21, wherein the thermal sensor comprises: a thermistor coupled between the power bus and one end of a resistor, wherein the other end of the resistor is coupled to the At the ground end, the thermistor reacts to the temperature of the cable to generate the temperature sensing signal. The charging device of claim 19, wherein the charger comprises: an AC-DC conversion circuit coupled to the power bus, converting an AC voltage to a DC voltage to provide the charging voltage; and a power transmission control chip coupled to the AC-DC conversion circuit and the chip, and the temperature sensing signal is captured from the storage circuit through the data transmission pin and At least one of the voltage sensing signals adjusts the charging voltage provided by the AC-DC converting circuit according to at least one of the temperature sensing signal and the voltage sensing signal. The charging device of claim 19, wherein the chip further comprises: a voltage dividing circuit coupled to the power bus, dividing the voltage on the power bus to generate a divided voltage, The chip further generates the voltage sensing signal according to the divided voltage. The charging device of claim 19, wherein the chip is an electronic tag (E-Marker) chip, the connection interface of the connector is a USB type-C interface, and the data transmission pin is a configuration channel (Configuration Channel , CC) pin.