Protection circuit and charging device

Abstract

To secure the safety against leak current on a human body with a simple structure.SOLUTION: A protection circuit connects between a contact positive electrode terminal that is exposed externally in a connector part to be connected to an appliance including a secondary battery, a first contact negative electrode terminal, and a second contact negative electrode terminal, and a positive electrode terminal and a ground terminal provided at a power output part that outputs power to be supplied to the secondary battery through the contact positive electrode terminal, the first contact negative electrode terminal, and the second contact negative electrode terminal. The protection circuit includes a P-type MOSFET connected between the contact positive electrode terminal and the positive electrode terminal, a first cable way connecting the contact positive electrode terminal and a drain terminal of the P-type MOSFET, a second cable way connecting the positive electrode terminal and a source terminal of the P-type MOSFET, a third cable way connecting the second cable way and the first contact negative electrode terminal through a resistor, a fourth cable way connecting a gate terminal of the P-type MOSFET between the first contact negative electrode terminal of the third cable way and the resistor, and a fifth cable way connecting the second contact terminal and the ground terminal.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a protection circuit and a charging device including the same. [Background technology]

[0002] Conventionally, when charging an electronic device with a built-in secondary battery, a configuration has been adopted in which the state of the secondary battery is confirmed using three terminals before charging begins.

[0003] In a charger for charging such a secondary battery, safety measures are taken to ensure the safety of the human body against leakage current from the resulting exposed terminals (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-178220 Summary of the Invention [Problem to be solved by the invention]

[0005] However, such a configuration requires components and circuits on the charger side for receiving information such as the voltage value and temperature of the secondary battery, resulting in a complicated configuration.

[0006] In view of the above-mentioned conventional techniques, an object of the present invention is to provide a technique capable of ensuring safety against leakage current to the human body with a simple configuration. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a contact positive terminal, a first contact negative terminal, and a second contact negative terminal exposed to the outside at a connector portion connected to a device including the secondary battery; a positive terminal and a ground terminal provided in a power output unit that outputs power supplied to the secondary battery via the positive contact terminal, the first negative contact terminal, and the second negative contact terminal; A protection circuit for connecting A P-type MOSFET connected between the contact positive terminal and the positive terminal; a first current path connecting the contact positive terminal and a drain terminal of the P-type MOSFET; a second current path connecting the positive terminal and a source terminal of the P-type MOSFET; a third electric path that connects the second electric path and the first contact negative terminal via a resistor; a fourth current path connecting a gate terminal of the P-type MOSFET between the first contact negative terminal of the third current path and the resistor; a fifth electric path connecting the second contact negative terminal and the ground terminal; The present invention is characterized by comprising:

[0008] According to this, even if a person touches any two of the contact positive terminal, the first contact negative terminal, and the second contact negative terminal exposed to the outside and any two contacted terminals are electrically connected via the human body, the P-type MOSFET is not turned on, so that no leakage current flows to the human body, or only a weak leakage current flows. Therefore, safety can be ensured with a simple configuration using a P-type MOSFET and passive components that does not require a complex configuration such as a control unit.

[0009] The present invention also provides a method for producing a method for manufacturing a semiconductor device comprising the steps of: a contact positive terminal exposed to the outside at a connector portion connected to a device including a secondary battery; A first contact negative terminal and a second contact negative terminal; a positive terminal and a ground terminal provided in a power output unit that outputs power supplied to the secondary battery via the positive contact terminal, the first negative contact terminal, and the second negative contact terminal; A protection circuit for connecting a PNP transistor connected between the contact positive terminal and the positive terminal; a first current path connecting the contact positive terminal and a collector terminal of the PNP transistor; a second current path connecting the positive terminal and the emitter terminal of the PNP transistor; a third electric path that connects the second electric path and the first contact negative terminal via a resistor; a fourth electrical path connecting a base terminal of the PNP transistor between the first contact negative terminal of the third electrical path and the resistor; a fifth electric path connecting the second contact negative terminal and the ground terminal; The present invention is characterized by comprising:

[0010] According to this, even if a person touches any two of the contact positive terminal, the first contact negative terminal, and the second contact negative terminal exposed to the outside and any two contacted terminals are electrically connected via the human body, the PNP transistor does not turn on, so that no leakage current flows to the human body, or only a weak leakage current flows. Therefore, safety can be ensured with a simple configuration using a PNP transistor and passive components that does not require a complex configuration such as a control unit.

[0011] The present invention also provides a method for producing a method for manufacturing a semiconductor device comprising the steps of: a contact positive terminal, a first contact negative terminal, and a second contact negative terminal exposed to the outside at a connector portion connected to a device including the secondary battery; a positive terminal and a ground terminal provided in a power output unit that outputs power supplied to the secondary battery via the positive contact terminal, the first negative contact terminal, and the second negative contact terminal; A protection circuit for connecting an N-type MOSFET connected between the first contact negative terminal and the ground terminal; a sixth current path connecting the first negative contact terminal and a drain terminal of the N-type MOSFET; a seventh electric path connecting the ground terminal and a source terminal of the N-type MOSFET; an eighth electric path connecting the seventh electric path and the second contact negative terminal via a resistor; a ninth electric path connecting a gate terminal of the N-type MOSFET between the first negative contact terminal of the eighth electric path and the resistor; a tenth electric circuit connecting the contact positive terminal and the positive terminal; The present invention is characterized by comprising:

[0012] According to this, even if a person touches any two of the contact positive terminal, the first contact negative terminal, and the second contact negative terminal exposed to the outside and any two contacted terminals are electrically connected via the human body, the N-type MOSFET is not turned on, so that no leakage current flows to the human body, or only a weak leakage current flows. Therefore, safety can be ensured with a simple configuration using an N-type MOSFET and passive components that does not require a complex configuration such as a control unit.

[0013] The present invention also provides a method for producing a method for manufacturing a semiconductor device comprising the steps of: a contact positive terminal, a first contact negative terminal, and a second contact negative terminal exposed to the outside at a connector portion connected to a device including the secondary battery; a positive terminal and a ground terminal provided in a power output unit that outputs power supplied to the secondary battery via the positive contact terminal, the first negative contact terminal, and the second negative contact terminal; A protection circuit for connecting an NPN transistor connected between the first contact negative terminal and the ground terminal; a sixth electric path connecting the first contact negative terminal and the collector terminal of the NPN transistor; , a seventh electric path connecting the ground terminal and the emitter terminal of the NPN transistor; an eighth electric path connecting the seventh electric path and the second contact negative terminal via a resistor; a ninth electric path connecting a base terminal of the NPN transistor between the first contact negative terminal of the eighth electric path and the resistor; a tenth electric circuit connecting the contact positive terminal and the positive terminal; The present invention is characterized by comprising:

[0014] According to this, even if a person touches any two of the contact positive terminal, the first contact negative terminal, and the second contact negative terminal exposed to the outside and any two contacted terminals are electrically connected via the human body, the NPN transistor does not turn on, so that no leakage current flows to the human body, or only a weak leakage current flows. Therefore, safety can be ensured with a simple configuration using an NPN transistor and passive components that does not require a complex configuration such as a control unit.

[0015] The present invention provides a charging device including the protection circuit, A charging device, characterized in that the contact positive terminal, the first contact negative terminal, and the second contact negative terminal are arranged asymmetrically in the connector portion.

[0016] According to this, the contact positive terminal, the first contact negative terminal, and the second contact negative terminal are arranged asymmetrically, thereby preventing connection in the wrong orientation to an electronic device having a corresponding terminal arrangement.

[0017] The present invention provides a charging device including the protection circuit, In the connector portion, the first contact negative terminal and the second contact negative terminal are disposed symmetrically with respect to the contact positive terminal.

[0018] According to this, the first contact negative terminal and the second contact negative terminal are arranged symmetrically with respect to the contact positive terminal. Therefore, even if the first contact negative terminal and the second contact negative terminal are connected inversely to the contact positive terminal of an electronic device having a corresponding terminal arrangement, the charger and the electronic device can be properly electrically connected to charge the secondary battery.

[0019] The present invention provides a charging device including the protection circuit, In the connector portion, the positive contact terminal and the second negative contact terminal are disposed symmetrically with respect to the first negative contact terminal.

[0020] According to this, the positive contact terminal and the second negative contact terminal are arranged symmetrically relative to the first negative contact terminal, so that even if the positive contact terminal and the second negative contact terminal are connected inversely to the first negative contact terminal in an electronic device having a corresponding terminal arrangement, the charger and electronic device can be properly electrically connected to charge the secondary battery. Effect of the Invention

[0021] According to the present invention, it is possible to ensure safety against leakage current to the human body with a simple configuration. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a circuit diagram of a charger according to a first embodiment. [Diagram 2] FIG. 2 is a circuit diagram illustrating a normal connection state between the charger according to the first embodiment and the electronic device. [Diagram 3] FIG. 3 is a diagram illustrating an electrical connection between the charger according to the first embodiment and a person. [Figure 4] FIG. 4 is a diagram illustrating another electrical connection between the charger and the person according to the first embodiment. [Diagram 5] FIG. 5 is a diagram illustrating another electrical connection between the charger and the person according to the first embodiment. [Figure 6] FIG. 6 is a circuit diagram of a charger according to a modified example of the first embodiment. [Figure 7] FIG. 7 is a circuit diagram of a charger according to the second embodiment. [Figure 8] FIG. 8 is a circuit diagram of a charger according to a modified example of the second embodiment. [Figure 9] FIG. 9 is a diagram showing the arrangement of terminals in the charger according to the embodiment. [Figure 10] FIG. 10 is a diagram showing another arrangement of the terminals in the charger according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

[0024] <Example 1> An example of an embodiment of the present invention will be described below. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, and the like of the components described in this example are not intended to limit the scope of the present invention to those alone.

[0025] (Charger configuration) FIG. 1 is a circuit diagram including a protection circuit 200 of a charger 100 according to a first embodiment. The charger 100 is connected to an electronic device 400 having a secondary battery and supplies power to the secondary battery. The charger 100 has a connector section 110 connected to the electronic device 400. The connector section 2 has terminals T1, T2, and T3 exposed to the outside, which are electrically connected to terminals T21, T22, and T23 on the electronic device 400 side, respectively. Here, the charger 100, the connector section 110, and the protection circuit 200 correspond to the charging device, the connector section, and the protection circuit, respectively, of the present invention. The electronic device 400 corresponds to the device of the present invention. The terminals T1, T2, and T3 correspond to the contact positive terminal, the second contact negative terminal, and the first contact negative terminal, respectively, of the present invention.

[0026] The protection circuit 200 is provided between the terminals T1, T2, and T3 and the positive terminal T4 and ground terminal T5 of the output unit 300. The output unit 300 is electrically connected via the protection circuit 200 and the terminals T1, T2, and T3, and outputs power to the secondary battery of the electronic device 400. The output unit 300 may be any component or circuit that can output power to the protection circuit 200 via the positive terminal T4, and may be, for example, a power conversion device such as a converter connected to a commercial power system, or a connector connected thereto. The output unit 300 corresponds to the power output unit of the present invention.

[0027] The terminal T1 is connected to a drain terminal of a p-channel enhancement type metal oxide field effect transistor (p-MOSFET) Tr1 by an electric path Ln1. A resistor R1 is connected in series between the terminal T1 and the drain terminal of the p-MOSFET Tr1 in the electric path Ln1. In addition, a source terminal of the p-MOSFET Tr1 is connected to a positive terminal T4 of the output section 300 by an electric path Ln2. A fuse F is connected between the positive terminal T4 and the source terminal of the p-MOSFET Tr1 in the electric path Ln2. Here, the p-MOSFET Tr1 corresponds to the P-type MOSFET of the present invention, and the electric paths Ln1 and Ln2 correspond to the first electric path and the second electric path of the present invention, respectively.

[0028] The terminal T2 is connected to a ground terminal T5 of the output unit 300 by an electric path Ln3. A resistor R2 is connected in series between the terminal T3 and the ground terminal T5 in the electric path Ln3. The electric path Ln3 is also grounded by a ground wire GND. Here, the electric path Ln3 corresponds to a fifth electric path of the present invention. The electric circuit Ln4 connects the connection point P1 between the resistor R1 and the drain terminal of the p-MOS ET Tr1 of the electric circuit Ln1 and the connection point P2 between the resistor R2 and the ground terminal T5 of the electric circuit Ln3. , and a capacitor C1 are connected in series. In addition, a connection point P3 of the electric circuit L2 between the source terminal of the p-MOS ET Tr1 and the fuse F is connected to a connection point P4 between the connection point P2 of the electric circuit Ln3 and the ground wire GND by an electric circuit Ln5. A capacitor C2 is connected in series to the electric circuit Ln5 between the connection point P3 and the connection point P4.

[0029] The terminal T3 is connected to a connection point P5 of the electric circuit Ln2 by an electric circuit Ln6. The connection point P5 is provided closer to the source terminal of the p-MOS ET Tr1 than the connection point P3. A resistor R3 is connected in series between the terminal T3 and the connection point P5 of the electric circuit Ln6. Here, the electric circuit Ln6 corresponds to the third electric circuit of the present invention, and the resistor R3 corresponds to the resistor of the present invention. An electric circuit Ln7, which is connected to the gate terminal of the p-MOSFET Tr1, is connected between the terminal T3 of the electric circuit Ln6 and the resistor R3 at a connection point P6. A connection point P7 of the electric circuit Ln2, which is provided between the source terminal of the p-MOSFET Tr1 and the connection point P5, is connected to a connection point P8 of the electric circuit Ln6, which is provided between the resistor R3 and the connection point P6, by an electric circuit Ln8. A capacitor C3 is connected in series to the electric circuit Ln6. Here, the electric circuit Ln7 corresponds to a fourth electric circuit of the present invention.

[0030] A diode D1 is connected in parallel between the source and drain terminals of the p-MOS ET Tr1 in the forward direction from the drain terminal to the source terminal, and a bidirectional TVS diode D2 is connected in parallel between the gate and source terminals of the p-MOS ET Tr1.

[0031] As shown in FIG. 1, when the electronic device 400 and the charger 100 are not connected, the terminals T2 and T3 are not connected, and the gate terminal and source terminal of the p-MOS ET Tr1 are connected by a resistor R3 and a capacitor C3 connected in parallel between the electric circuit Ln2 and the electric circuit Ln7. Since the p-MOS ET Tr1 is in the off state, no charging voltage is applied to the terminals T1, T2, and T3.

[0032] 2, when the electronic device 400 and the charger 100 are connected, the terminals T1, T2, and T3 of the charger 100 are connected to the terminals T21, T22, and T23 of the electronic device 400, respectively. Therefore, the p-MOSETTr1 is turned on, and the secondary battery of the electronic device 400 can be charged from the output unit 300 via the protection circuit 200, as shown by the thick arrow.

[0033] 3 shows a state in which a person 500 touches terminals T1 and T2 exposed to the outside of charger 100. At this time, terminals T1 and T2 are connected via person 500, but terminals T2 and T3 are not connected and p-MOS ET Tr1 is in the off state, so no leakage current dangerous to person 500 flows.

[0034] 4 shows a state in which person 500 touches terminals T1 and T3 exposed to the outside of charger 100. At this time, terminals T1 and T3 are connected via person 500, but terminals T2 and T3 are not connected and p-MOS ET Tr1 is in the off state, so no leakage current dangerous to person 500 flows.

[0035] 5 shows a state in which a person 500 touches terminals T2 and T3 exposed to the outside of the charger 100. At this time, terminals T2 and T3 are connected via the person 500, but the p-MOS ET Tr1 is in an off state. Therefore, as shown by the thick arrow, the positive terminal T4 of the output unit 300 and person 500 pass through an electric path formed by connecting electric paths Ln2 and Ln6 via a connection point P5, and the current output from the positive terminal T4 of the output unit 300 flows to the person 500 via terminal T2. However, by setting the resistance value of resistor R3 to a large value, for example, 4070 kΩ, the leakage current can be reduced to less than 100 μA, which is the standard for medical devices. Since the leakage current can be suppressed to a low level, no leakage current that is dangerous to the human body flows.

[0036] As described above, according to the first embodiment, the protection circuit 200 having a simple configuration including passive components and transistors can ensure safety against leakage current to the human body.

[0037] <Modification> 6 shows a circuit diagram including a protection circuit 201 of a charger 101 according to a modified example of the embodiment 1. Configurations common to the protection circuit 200 according to the embodiment 1 are denoted by common reference numerals and detailed description thereof will be omitted.

[0038] In the protection circuit 201, a PNP transistor Tr2 is used instead of the p-MOS ET Tr1. Here, the emitter terminal of the PNP transistor Tr2 is connected to the positive terminal T4 through the fuse F by the electric circuit Ln2. The collector terminal of the PNP transistor Tr2 is connected to the terminal T1 by the electric circuit Ln1. The base terminal of the PNP transistor Tr2 is connected to the electric circuit 6 that connects the terminal T3 and the electric circuit Ln2 by the electric circuit Ln11. A resistor R11 is connected in series to the electric circuit Ln11 between the base terminal of the PNP transistor Tr2 and a connection point P6 with the electric circuit Ln6. A resistor R12 is connected in parallel between the emitter terminal and the base terminal of the PNP transistor Tr2. The resistor R12 is connected in series to the electric circuit Ln12 that is connected to the electric circuit Ln11 at the connection point P11 and to the electric circuit Ln2 at the connection point P12. At this time, the capacitor C2 is connected in series to the electric path Ln2 that connects the terminal T3 and the electric path Ln2. Here, the PNP transistor Tr2 corresponds to the PNP transistor of the present invention. Also, the terminal T3 to the connection point P6 of the electric path Ln6, the connection point P6 to the connection point P11 of the electric path Ln11, and the connection point P11 to the connection point P12 of the electric path Ln12 correspond to the third electric path of the present invention. Also, the resistor R12 corresponds to the resistor of the present invention. Also, the connection point P11 of the electric path Ln11 to the base terminal of the PNP transistor Tr2 corresponds to the fourth electric path of the present invention.

[0039] The operation of the charger 101 having this protection circuit 201 when connected to the electronic device 400 is the same as that described for the charger 100. In addition, the operation of the protection circuit 201 when a person 500 touches any two of the terminals T1, T2, and T3 of the charger 101 is also the same as that described for the protection circuit 200, and therefore will not be described.

[0040] As described above, according to this modification, the protection circuit 201 having a simple configuration including passive components and transistors can ensure safety against leakage current to the human body.

[0041] <Example 2> 7 shows a circuit diagram including a protection circuit 202 of the charger 102 according to Example 2. Configurations common to the charger 100 and protection circuit 200 according to Example 1 are denoted by common reference numerals and detailed description thereof will be omitted.

[0042] In the protection circuit 202, an n-MOSFET Tr3 is provided not on the electric path connecting the positive terminal T4 and the terminal T but on the electric path connecting the ground terminal T5 and the terminal T3. One end of the electric path Ln3 is connected to the terminal T1, and the other end is connected to the drain terminal of the n-MOSFET Tr3 via a resistor R2. The source terminal of the n-MOSFET Tr3 is connected to the ground terminal T5 by an electric path Ln21. Here, the n-MOSFET Tr3 corresponds to the N-type MOSFET of the present invention. The electric paths Ln3 and Ln21 correspond to the sixth and seventh electric paths of the present invention, respectively.

[0043] Here, the terminal T3 is connected to the electric line Ln21 at a connection point P21 via the electric line Ln22. A resistor R21 is connected in series to the electric line Ln22. The gate terminal of the OSFETTr3 is connected to the electric circuit Ln22 at a connection point P22 via the electric circuit Ln23. A capacitor C21 is connected between the electric circuit Ln22 and the electric circuit 21 by the electric circuit Ln24. One end of the capacitor C21 is connected to the electric circuit Ln22 at a connection point P23 between the connection point P22 of the electric circuit Ln22 and the resistor R21, and the other end is connected to the electric circuit Ln21 at a connection point P24 between the source terminal of the n-MOSFETTr3 and the connection point P21 by the electric circuit Ln24. The electric circuit Ln1 connects the terminal T1 and the positive terminal T4, and on the electric circuit Ln1, a fuse F, a connection point P3, a connection point P1, and a resistor R1 are arranged in this order from the positive terminal T4 side. Here, the electric circuit Ln22 corresponds to the eighth electric circuit of the present invention, and the resistor R21 corresponds to the resistor of the present invention. The electric circuit Ln23 corresponds to the ninth electric circuit of the present invention. The electric path Ln1 corresponds to the tenth electric path of the present invention.

[0044] In such a protection circuit 202, the electric paths Ln3 and Ln21 connecting the terminal T2 and the ground terminal T5 are connected / disconnected by turning on / off the n-MOSFETTr3. In this way, the n-MOSFETTr3, whose threshold value is the opposite to that of the p-MOSFETTr1 in the first embodiment, is provided between the electric paths Ln3 and Ln21 connected to the ground terminal T5 side and the electric path Ln22 connected to the terminal T2 at one end, so that the n-MOSFETTr3 is turned on / off in the same manner as the protection circuit 200 in the first embodiment, and thus the same effect can be obtained. However, in an electronic device 401 connected to the charger 102 configured in this way and having a secondary battery charged, the terminal T21 and the terminal 23 are connected within the electronic device 401. Terminals T1, T2, and T3 of the charger 102 are connected to terminals T21, T22, and T23 of the electronic device 401, respectively, and terminals T1 and T3 of the charger 102 are short-circuited, thereby charging the secondary battery of the electronic device 401.

[0045] As described above, according to the second embodiment, the protection circuit 202 having a simple configuration including passive components and transistors can ensure safety against leakage current to the human body.

[0046] <Modification> 8 shows a circuit diagram including a protection circuit 203 of the charger 103 according to a modified example of the embodiment 2. Configurations common to the protection circuit 202 according to the embodiment 2 and the protection circuit 200 according to the embodiment 1 are denoted by common reference numerals and detailed descriptions thereof will be omitted.

[0047] In the protection circuit 203, an NPN transistor Tr4 is used instead of the n-MOSFET Tr3. Here, the collector terminal of the NPN transistor Tr4 is connected to the terminal T2 by the electric path Ln3. The emitter terminal of the NPN transistor Tr4 is connected to the ground terminal T5 by the electric path Ln21. The base terminal of the NPN transistor Tr4 is connected to the electric path Ln22 by the electric path Ln25. A resistor R22 is connected in series to the electric path Ln25, and one end of the electric path Ln25 is connected to the base terminal of the NPN transistor Tr4 and the other end is connected to the electric path Ln22 at a connection point P25. A resistor R23 is connected in parallel between the emitter terminal and base terminal of the NPN transistor Tr4 by the electric path Ln26. The resistor R23 is connected at one end to the electric path Ln25 at a connection point P27 between the base terminal of the NPN transistor Tr4 and the resistor R22, and at the other end to the electric path Ln21 at a connection point P26 between the emitter terminal of the NPN transistor Tr4 and a connection point P24, by the electric path Ln26. Here, the NPN transistor Tr4 corresponds to the NPN transistor of the present invention. Also, the terminal T3 to the connection point P25 of the electric path Ln22, the connection point P25 to the connection point P27 of the electric path Ln25, and the connection point P27 to the connection point P26 of the electric path Ln26 correspond to the eighth electric path of the present invention, and the connection point P27 to the gate terminal of the NPN transistor Tr4 of the electric path Ln26 corresponds to the ninth electric path of the present invention.

[0048] When the charger 103 having this protection circuit 203 is connected to the electronic device 400, the operation is as follows: This is similar to the charger 102. Moreover, the operation of the protection circuit 203 when the person 500 touches any two of the terminals T1, T2, and T3 of the charger 103 is also similar to that of the protection circuit 202, and therefore will not be described.

[0049] As described above, according to this modification, the protection circuit 203 having a simple configuration including passive components and transistors can ensure safety against leakage current to the human body.

[0050] <Charger configuration> The following describes the arrangement of terminals T1, T2, and T3 in charger 100 equipped with protection circuit 200. Chargers 101, 102, and 103 equipped with protection circuits 201, 202, and 203, respectively, can also adopt the following configuration, so individual descriptions will be omitted.

[0051] 9 shows an example of the arrangement of the terminals T1, T2, and T3 in the connector section 110 of the charger 100. The charger 100 includes a flat, approximately rectangular parallelepiped housing 120 and a cable 130. One end of the cable 130 is connected to the housing 120, and the other end is connected to a power source such as an AC adapter. In the planar connector section 110 formed on one surface of the housing 120, the terminals T2, T1, and T3 are arranged along an axis Ax1 in the longitudinal direction of the connector section 110, in that order from the cable 130 side. The terminal T1, and the terminals T2 and T3 are arranged asymmetrically with respect to the axis Ax1 in the longitudinal direction of the connector section 110. That is, T1 is arranged on one side of the axis Ax, and the terminals T2 and T3 are arranged on the other side of the axis Ax. Terminals T21, T22, and T23 of electronic device 400 are also arranged asymmetrically with respect to the axis of the arrangement direction in order to contact terminals T1, T2, and T3 on the charger 100 side. Therefore, even if an attempt is made to connect electronic device 400 and connector portion 110 of charger 100 in the opposite direction to the arrangement direction of each terminal, a proper connection cannot be made, thereby preventing connection of electronic device 400 and charger 100 in the wrong orientation.

[0052] 10 shows another example of the arrangement of the terminals T1, T2, and T3 in the connector section 110 of the charger 100 (the same applies to the charger 101). The charger 100 includes a flat, approximately rectangular parallelepiped housing 120 and a cable 130, as in FIG. 9. One end of the cable 130 is connected to the housing 120, and the other end is connected to a power source such as an AC adapter. In the planar connector section 110 formed on one surface of the housing 120, the terminals T2, T1, and T3 are arranged along the axis Ax1 in the longitudinal direction of the connector section 110, in that order from the cable 130 side. The terminal T1, and the terminals T2 and T3 are arranged symmetrically with respect to the axis Ax1 in the longitudinal direction of the connector section 110. In addition, at this time, by making the terminal T1 a positive electrode and the terminals T2 and T3 negative electrodes, the terminal T1, which is a positive electrode, and the terminals T2 and T3, which are negative electrodes, are arranged symmetrically with respect to the axis Ax2 perpendicular to the longitudinal direction. For this reason, the terminals T21, T22, and T23 of the electronic device 400 are also arranged symmetrically with respect to the axis Ax1 in the arrangement direction in order to contact the terminals T1, T2, and T3 on the charger 100 side, and the terminals T22 and T23 are arranged symmetrically with respect to the axis Ax2 perpendicular to the arrangement direction with respect to the terminal T21. With this arrangement, even if the electronic device 400 and the connector part 110 of the charger 100 are connected in the opposite direction with respect to the arrangement direction of each terminal, they can be properly connected, so that the electronic device 400 and the charger 100 can be connected without worrying about the orientation, and there is no risk of being unable to connect properly due to a wrong orientation. In addition, in the connector section 110, the terminals T2 and T3 may be arranged in reverse.

[0053] FIG. 10 shows another arrangement of the terminals T1, T2, and T3 in the connector section 110 of the charger 102 (the same applies to the charger 103). In FIG. 10, the reference characters in parentheses indicate the arrangement of the terminals T1, T2, and T3 in the charger 103 and 104 (the arrangement of the terminal T3 is the same as that of the charger 102). 0 and 101.) At this time, in the planar connector section 110 formed on the position surface of the housing 120, terminals T1, T2, and T3 are arranged along an axis Ax1 in the longitudinal direction of the connector section 110n, in that order from the cable 130 side. The terminals T2, T1, and T3 are arranged symmetrically with respect to the axis Ax1 in the longitudinal direction of the connector section 110. The terminal T2, which is the negative electrode, the terminal T1, which is the positive electrode, and the terminal T3, which is the negative electrode, are arranged symmetrically with respect to the axis Ax2 in the direction perpendicular to the longitudinal direction. At this time, the terminals T21, T22, and T23 of the electronic device 401 also come into contact with the terminals T1, T2, and T3 of the charger 102, so that the three terminals T21, T22, and T23 are similarly arranged symmetrically with respect to the axis Ax1 in the arrangement direction, and the terminals T21 and T23 are arranged symmetrically with respect to the axis Ax2 perpendicular to the arrangement direction with respect to the terminal T33, so that the electronic device 401 and the connector section 110 of the charger 102 are arranged symmetrically with respect to the arrangement direction of each terminal. With this arrangement, even if the electronic device 401 and the connector section 110 of the charger 102 are connected in the opposite direction with respect to the arrangement direction of each terminal, they can be properly connected, so that the electronic device 401 and the charger 100 can be connected without worrying about the orientation, and there is no case where they cannot be properly connected even if they are connected in the wrong orientation. In addition, in the connector section 110, the terminals T1 and T3 may be arranged in reverse. [Explanation of symbols]

[0054] 100,101,102,103...Charger 110 Connector part 200,201,202,203...protection circuit 300···Output section 400...Electronic equipment T1, T2, T3... terminals

Claims

1. a contact positive terminal, a first contact negative terminal, and a second contact negative terminal exposed to the outside at a connector portion connected to a device including the secondary battery; a positive terminal and a ground terminal provided in a power output unit that outputs power supplied to the secondary battery via the contact positive terminal, the first contact negative terminal, and the second contact negative terminal; A protection circuit for connecting A P-type MOSFET connected between the contact positive terminal and the positive terminal; a first current path connecting the contact positive terminal and a drain terminal of the P-type MOSFET; a second current path connecting the positive terminal and a source terminal of the P-type MOSFET; a third electric path connecting the second electric path and the first contact negative terminal via a resistor; a fourth electric path connecting a gate terminal of the P-type MOSFET between the first contact negative terminal of the third electric path and the resistor; a fifth electric path connecting the second contact negative terminal and the ground terminal; A protection circuit comprising:

2. a contact positive terminal, a first contact negative terminal, and a second contact negative terminal exposed to the outside at a connector portion connected to a device including the secondary battery; a positive terminal and a ground terminal provided in a power output unit that outputs power supplied to the secondary battery via the contact positive terminal, the first contact negative terminal, and the second contact negative terminal; A protection circuit for connecting a PNP transistor connected between the contact positive terminal and the positive terminal; a first current path connecting the contact positive terminal and a collector terminal of the PNP transistor; a second current path connecting the positive terminal and the emitter terminal of the PNP transistor; a third electric path connecting the second electric path and the first contact negative terminal via a resistor; a fourth electrical path connecting a base terminal of the PNP transistor between the first contact negative terminal of the third electrical path and the resistor; a fifth electric path connecting the second contact negative terminal and the ground terminal; A protection circuit comprising:

3. a contact positive terminal, a first contact negative terminal, and a second contact negative terminal exposed to the outside at a connector portion connected to a device including the secondary battery; a positive terminal and a ground terminal provided in a power output unit that outputs power supplied to the secondary battery via the contact positive terminal, the first contact negative terminal, and the second contact negative terminal; A protection circuit for connecting an N-type MOSFET connected between the first contact negative terminal and the ground terminal; a sixth electric path connecting the first contact negative terminal and a drain terminal of the N-type MOSFET; a seventh electric path connecting the ground terminal and a source terminal of the N-type MOSFET; an eighth electric path connecting the seventh electric path and the second contact negative terminal via a resistor; a ninth electric path connecting a gate terminal of the N-type MOSFET between the first contact negative terminal of the eighth electric path and the resistor; a tenth electric circuit connecting the contact positive terminal and the positive terminal; A protection circuit comprising:

4. a contact positive terminal, a first contact negative terminal, and a second contact negative terminal exposed to the outside at a connector portion connected to a device including the secondary battery; a positive terminal and a ground terminal provided in a power output unit that outputs power supplied to the secondary battery via the contact positive terminal, the first contact negative terminal, and the second contact negative terminal; A protection circuit for connecting an NPN transistor connected between the first contact negative terminal and the ground terminal; a sixth electric path connecting the first contact negative terminal and a collector terminal of the NPN transistor; a seventh electric path connecting the ground terminal and the emitter terminal of the NPN transistor; an eighth electric path connecting the seventh electric path and the second contact negative terminal via a resistor; a ninth electric path connecting a base terminal of the NPN transistor between the first contact negative terminal of the eighth electric path and the resistor; a tenth electric circuit connecting the contact positive terminal and the positive terminal; A protection circuit comprising:

5. A charging device comprising the protection circuit according to any one of claims 1 to 4, A charging device, characterized in that the contact positive terminal, the first contact negative terminal, and the second contact negative terminal are arranged asymmetrically in the connector portion.

6. A charging device including the protection circuit according to claim 1 or 2, A charging device, characterized in that in the connector portion, the first contact negative terminal and the second contact negative terminal are disposed symmetrically with respect to the contact positive terminal.

7. A charging device including the protection circuit according to claim 3 or 4, A charging device, characterized in that in the connector portion, the contact positive terminal and the second contact negative terminal are disposed symmetrically with respect to the first contact negative terminal.

Images