TWI687786B - Assembled power supply device - Google Patents

Abstract

An assembled power supply device is provided. The assembled power supply device includes a primary circuit and a plurality of secondary circuits. The primary circuit includes a transformer, a controller, and a power switch. The controller adjusts the driving signal in response to a variation of a feedback signal. The power switch is configured to drive the transformer according to the driving signal, so that the transformer provides a converted power associated with the variation of the feedback signal. The secondary circuits are each configured to provide multiple output power source of different power. Each of secondary circuits, when assembled with the primary circuit, provides an output power according to the converted power and provides the feedback signal according to the voltage value of the output power.

Description

Combined power supply device

The invention relates to a power supply device, and in particular to a combined power supply device.

The current power supply device is mainly based on a single type. This type of power supply device has a limited power range in power supply. If the electronic device has a larger power requirement for power supply and the power requirement is greater than the power range of the power supply device, the speed at which the power supply device charges the electronic device will be significantly reduced. Therefore, how to improve the operating power range of the power supply device is one of the development priorities of the power supply device.

The invention provides a combined power supply device for improving the power supply power range.

The combined power supply device of the present invention includes a main circuit and a plurality of auxiliary circuits. The main circuit includes a transformer, a controller, and a power switch. The controller is configured to provide the driving signal and adjust the driving signal in response to the change of the feedback signal. The power switch is coupled to the transformer and the controller. The power switch is configured to drive the transformer according to the drive signal, so that the transformer provides a converted power source associated with the change in the feedback signal. The secondary circuit is configured to be detachably assembled with the main circuit. The plurality of secondary body circuits are respectively configured to provide a plurality of output power sources of different powers, and each includes an output circuit and a feedback circuit. The output circuit is configured to provide output power according to the converted power when the main circuit is assembled with the plurality of sub-body circuits. The feedback circuit is coupled to the output circuit. The feedback circuit is configured to provide a feedback signal according to the voltage value of the output power source when the sub-body circuit and the main circuit are assembled.

Based on the above, the combined power supply device of the present invention includes a main circuit detachably assembled and a plurality of sub-body circuits. When one of the multiple secondary circuits is assembled with the main circuit, the secondary circuit provides output power according to the converted power from the transformer and provides a feedback signal according to the voltage value of the output power. The main circuit adjusts the driving signal in response to the change of the feedback signal, and drives the transformer according to the driving signal, so that the transformer provides the converted power associated with the change of the feedback signal. Therefore, when the secondary circuit changes, that is, when the demand for the operating power of the secondary circuit changes, the output power changes, so that the main circuit can adjust the converted power. In this way, the power range of the power supply device can be greatly increased.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

Some embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following description refers to element symbols. When the same element symbols appear in different drawings, they will be regarded as the same or similar elements. These examples are only a part of the present invention, and do not disclose all the embodiments of the present invention. Rather, these embodiments are only examples of devices and methods within the scope of the patent application of the present invention.

Please refer to FIG. 1, which is a schematic diagram of a combined power supply device according to an embodiment of the invention. In this embodiment, the combined power supply device 100 includes a main circuit 110 and a sub-circuit 120. The main circuit 110 and the sub-circuit 120 are detachably assembled. The main circuit 110 is configured to receive the input power Vi and convert the input power Vi to generate a converted power Vt. When the main body circuit 110 and the sub-body circuit 120 are assembled, the sub-body circuit 120 receives the converted power Vt from the main circuit 110, generates an output power Vo according to the converted power Vt, and provides the output power Vo through the output power line CC To an electronic device (not shown) to operate or charge the electronic device. In addition, when the main body circuit 110 is assembled with the sub-body circuit 120, the sub-body circuit 120 can also provide the feedback signal FS according to the output power Vo. The main circuit 110 receives the feedback signal FS and adjusts the economy according to the change of the feedback signal FS Convert power supply Vt. In some embodiments, the secondary circuit 120 may be built in the electronic device. Therefore, the sub-body circuit 120 can operate or charge the electronic device without outputting the power supply line CC. The combined power supply device 100 serves as an adapter or a charger.

For specific description, please refer to FIG. 2, which is a schematic diagram of another combined power supply device according to an embodiment of the invention. In this embodiment, the combined power supply device 200 includes a main circuit 210 and sub-body circuits 220_1, 220_2, 220_3. The main circuit 210 of this embodiment may be similar to the main circuit 110 of FIG. 1. The sub-body circuits 220_1, 220_2, 220_3 of this embodiment are respectively similar to the sub-body circuit 120 of FIG. In this embodiment, when the main body circuit 210 and the sub-body circuit 220_1 are assembled, the main body circuit 210 provides the first converted power according to the feedback signal from the sub-body circuit 220_1, and the sub-body circuit 220_1 provides according to the first converted power The 45-watt (Watt) output power Vo_1 and the output power Vo_1 are provided via the output power line CC_1 to be suitable for an electronic device operated or charged by a 45-watt power supply. When the main circuit 210 and the secondary circuit 220_2 are assembled, the main circuit 210 provides the second converted power according to the feedback signal from the secondary circuit 220_2, and the secondary circuit 220_2 provides the 65-watt output power Vo_2 according to the second converted power , And provides the output power Vo_2 to the electronic device suitable for operation or charging by the 65-watt power supply through the output power line CC_2. Similarly, when the main body circuit 210 and the sub-body circuit 220_3 are assembled, the sub-body circuit 220_3 can provide an output power Vo_3 of 90 watts, and the output power Vo_3 can be supplied via the output power line CC_3 to be suitable for operation with a power of 90 watts Or charging electronic devices.

In other words, when different electronic devices have different operating power requirements (for example, 45 watts, 65 watts, and 90 watts of operating power), the main circuit 210 can select the secondary circuit 220_1 according to the above different operating power requirements. One of 220_2 and 220_3 is detachably assembled. Therefore, the combined power supply device 200 may have a larger operating power range. In some embodiments, the main circuit 210 may also select other sub-body circuits for providing 120-watt or 135-watt output power for detachable assembly. The number of auxiliary circuits and the output power of the present invention are not limited to this embodiment.

Please refer to FIG. 3, which is a schematic circuit diagram of a combined power supply device according to an embodiment of the invention. In this embodiment, the main circuit 110 includes a transformer TR, a controller 112, and a power switch Q. The controller 112 is configured to provide the driving signal SD and adjust the driving signal SD in response to the change of the feedback signal FS. The power switch Q is coupled to the transformer TR and the controller 112. The power switch Q is configured to drive the transformer TR according to the driving signal SD, so that the transformer TR generates the converted power supply Vt associated with the change of the feedback signal FS. In detail, the transformer TR includes a primary winding Np and a secondary winding Ns. The transformer TR can receive the input power Vi through the primary winding Np (such as the common-polarity terminal of the primary winding Np, ie, the dot), and convert the input power Vi to generate a converted on the secondary winding Ns Power supply Vt. The first end of the power switch Q is coupled to the primary winding Np of the transformer TR (such as an opposite-polarity terminal of the primary winding Np, that is, a point not hit). The second terminal of the power switch Q is coupled to the ground GND1 of the main circuit 110 via a resistor Rcs. The control terminal of the power switch Q is coupled to the controller 112. The control terminal of the power switch Q is used to receive the driving signal SD provided by the controller 112. In this embodiment, according to requirements, the main circuit 110 may further include an input circuit (not shown) coupled to the primary winding Np. The input circuit may be a combined circuit including at least one of a filter, a bridge rectifier, a fuse, and an energy storage capacitor.

In this embodiment, the sub-body circuit 120 is configured to be detachably assembled with the main circuit 110. The secondary circuit 120 includes an output circuit 122 and a feedback circuit 124. The output circuit 122 is configured to provide the output power Vo according to the converted power Vt from the main circuit 110 when the main circuit 110 and the sub-circuit 120 are assembled. The feedback circuit 124 is coupled to the output circuit 122. The feedback circuit 124 is configured to provide the feedback signal FS according to the voltage value of the output power Vo when the sub-body circuit 120 and the main circuit 110 are assembled.

It is worth mentioning here that the main circuit 110 of the combined power supply device 100 can support a larger power range (such as 45 watts to 135 watts as described in FIG. 2 ). The power of the output power Vo is determined by the auxiliary circuit 120. In this way, the adjustment range of the output power Vo of the combined power supply device 100 can be greatly improved. In addition, the sub-body circuit 120 only includes the output circuit 122 and the feedback circuit 124, and the transformer TR, the power switch Q, and the controller 112 are provided in the main circuit 110, and the main circuit 110 is shared. Therefore, the design complexity of the combined power supply device 100 can be reduced.

To further explain, in this embodiment, the output circuit 122 at least includes an output diode Do and an output capacitor Co. The anode of the output diode Do is used to receive the converted power Vt when the sub-body circuit 120 and the main circuit 110 are assembled. The first end of the output capacitor Co is coupled to the cathode of the output diode Do. The second end of the output capacitor Co is coupled to the ground GND2 of the sub-body circuit 120. The output circuit 122 provides the output power Vo via the first end of the output capacitor Co. In this embodiment, the design of the output diode Do and the output capacitor Co can determine the power value of the output power Vo. Therefore, the plurality of sub-body circuits (for example, the sub-body circuits 220_1, 220_2, and 220_3 in FIG. 2) used to provide different output power sources have different output circuits.

The feedback circuit 124 is coupled to the first end of the output capacitor Co to receive the output power Vo. When the sub-body circuit 120 and the main circuit 110 are assembled, the feedback circuit 124 lowers the voltage value of the feedback signal FS according to the decrease in the voltage value of the output power Vo. When the sub-body circuit 120 and the main circuit 110 are assembled, the feedback circuit 124 increases the voltage value of the feedback signal FS according to the rise of the voltage value of the output power Vo. When the voltage value of the output power Vo does not change, the feedback circuit 124 does not adjust the voltage value of the feedback signal FS. Therefore, the voltage value of the feedback signal FS is positively related to the voltage value of the output power Vo.

When the secondary circuit 120 is assembled with the main circuit 110, the controller 112 adjusts the driving signal SD according to the change of the feedback signal FS. When the voltage value of the feedback signal FS decreases, the controller 112 increases the duty cycle of the driving signal SD, so that the transformer TR increases the power of the converted power supply Vt. When the voltage value of the feedback signal FS increases, the controller 112 reduces the duty cycle of the driving signal SD, so that the transformer TR reduces the power of the converted power supply Vt.

It is worth mentioning here that the main circuit 110 will provide the corresponding converted power Vt according to the sub-body circuit 120. In this way, the combined power supply device 100 provides the appropriate output power Vo according to the sub-body circuit 120 to protect the electronics The device will not be damaged by the excessively large converted power Vt.

Next, the operation of the main circuit and the sub-circuit will be explained using FIG. 2 as an example. When the sub-body circuit 220_2 is assembled with the main body circuit 210, the main body circuit 210 can provide the second converted power so that the sub-body circuit 220_2 provides the 65-watt output power Vo_2. The voltage value of the output power Vo_2 may be, for example, 19V. The current value of the output power Vo_2 may be 3.42 amperes, for example. When the sub-body circuit 220_2 is replaced with the sub-body circuit 220_1, the second converted power supply will make the voltage value of the output power Vo_1 greater than 19 volts. Therefore, the secondary circuit 220_1 will provide a feedback signal with a higher voltage value. The main circuit 210 receives the feedback signal, and reduces the duty cycle of the driving signal by the controller to reduce the power of the second converted power supply, thereby providing the first converted power supply. The secondary circuit 220_1 provides the output power Vo_1 according to the first converted power. The voltage value of the output power Vo_2 is, for example, 19V. The current value of the output power Vo_2 is, for example, 2.37 amperes. On the other hand, when the secondary body circuit 220_2 is replaced with the secondary body circuit 220_3, the second converted power supply will make the voltage value of the output power Vo_3 less than 19 volts. Therefore, the secondary circuit 220_3 will provide a feedback signal with a lower voltage value. The main circuit 210 receives the feedback signal, and increases the duty cycle of the driving signal by the controller to increase the power of the second converted power supply, thereby providing the third converted power supply. The secondary circuit 220_3 provides the output power Vo_3 according to the third converted power. The voltage value of the output power Vo_3 is, for example, 19V. The current value of the output power Vo_2 is, for example, 4.7 amperes.

In the embodiment of FIG. 3, the main circuit 110 further includes a first power pin PP1, a first feedback pin PR1, and a first reference pin PF1. Correspondingly, the secondary body circuit 120 further includes a second power pin PP2, a second feedback pin PR2, and a second reference pin PF2. When the main circuit 110 and the sub-body circuit 120 are assembled, the first power pin PP1 contacts the second power pin PP2, the first feedback pin PR1 contacts the second feedback pin PR2, and the first reference pin PF1 contacts the second Refer to pin PF2.

In addition, when the main circuit 110 and the sub-circuit 120 are assembled, the output circuit 122 receives the converted power Vt via the first power pin PP1 and the second power pin PP2. The main circuit 110 receives the feedback signal FS via the second feedback pin PR2 and the first feedback pin PR1. In addition, the first end of the secondary winding Ns of the transformer TR (for example, the unnamed end of the secondary winding Ns, that is, an undotted point) is coupled to the output circuit via the first power supply pin PP1 and the second power supply pin PP2 , The second end of the secondary winding Ns of the transformer TR (for example, the same-named end of the secondary winding Ns, ie, the dot) is coupled to the secondary body circuit 120 via the first reference pin PF1 and the second reference pin PF2的GND GND2.

Please refer to FIG. 4, which is a schematic diagram of a pin configuration according to an embodiment of the invention. For example, the first power pin PP1, the first reference pin PF1, and the first feedback pin PR1 are respectively disposed on the first plane PL1 of the casing of the main circuit 110. The second power pin PP2, the second reference pin PF2, and the second feedback pin PR2 are respectively disposed on the second plane PL2 of the casing of the sub-body circuit 120. As shown in FIG. 4, the first power pin PP1, the first reference pin PF1, and the first feedback pin PR1 are arranged along a first direction. The second power pin PP2, the second reference pin PF2, and the second feedback pin PR2 are arranged in a second direction opposite to the first direction. The distance between the first power supply pin PP1 and the first feedback pin PR1 is equal to the distance between the second power supply pin PP2 and the second feedback pin PR2. The distance between the first feedback pin PR1 and the first reference pin PF1 is equal to the distance between the second feedback pin PR2 and the second reference pin PF2. In this way, when the sub-body circuit 120 and the main circuit 110 are assembled, the first plane PL1 and the second plane PL2 are arranged face-to-face such that the first power pin PP1 and the second power pin PP2 are in electrical contact, the first The feedback pin PR1 is in electrical contact with the second feedback pin PR2, and the first reference pin PF1 is in electrical contact with the second reference pin PF2. The arrangement of the first power pin PP1, the first feedback pin PR1, the first reference pin PF1 and the arrangement of the second power pin PP2, the second feedback pin PR2 and the second reference pin PF2 in FIG. 4 This is just an example, and the invention is not limited thereto.

The materials of the first power pin PP1, the first feedback pin PR1, the first reference pin PF1, the second power pin PP2, the second feedback pin PR2 and the second reference pin PF2 may be copper, for example.

In this embodiment, the first plane PL1 may be coplanar with the electrical contact surface of the first power pin PP1, the electrical contact surface of the first feedback pin PR1, and the electrical contact surface of the first reference pin PF1 . The second plane PL2 may be coplanar with the electrical contact surface of the second power pin PP2, the electrical contact surface of the second feedback pin PR2, and the electrical contact surface of the second reference pin PF2. Therefore, when the sub-body circuit 120 and the main circuit 110 are assembled, the first plane PL1 and the second plane PL2 will be completely attached. Therefore, the first power pin PP1, the first feedback pin PR1, the first reference pin PF1, the second power pin PP2, the second feedback pin PR2 and the second reference pin PF2 can be prevented from being exposed during assembly, In order to improve the safety of use.

For further explanation, please refer to FIG. 4 and FIG. 5 at the same time. FIG. 5 is a schematic diagram of a first plane according to an embodiment of the present invention. In this embodiment, the material of at least a first portion of the first plane PL1 of the casing of the main circuit 110 is a magnetic material. For example, the first portions A1, A2 of the first plane PL1 of the body circuit 110 are magnetic materials. It should be understood that the second plane PL2 of the casing of the secondary body circuit 120 also has a second part corresponding to the first parts A1 and A2. The material of the second part is magnetic material. The main circuit 110 and the sub-circuit 120 can be assembled by the magnetic force of the first part A1, A2 and the second part. The material of the housing of the main circuit 110 except for the first parts A1 and A2 may be plastic, for example. It should be understood that the material of the portion of the casing of the secondary circuit 120 other than the second portion may also be plastic, for example.

In some embodiments, the polarity of the magnetic pole of the first part A1 is opposite to the polarity of the magnetic pole of the first part A2, and the polarity of the magnetic pole of the second part corresponding to the first part A1 is opposite to the polarity of the magnetic pole of the first part A1. The polarity of the magnetic pole of the second portion corresponding to the first portion A2 is opposite to the polarity of the magnetic pole of the first portion A2. In this way, assembly errors of the main circuit 110 and the sub-circuit 120 can be prevented. The number of the first part of the present invention may be one or more. The number and arrangement of the first part of the present invention are not limited to this embodiment.

Please refer to FIG. 6, which is a schematic circuit diagram of a combined power supply device according to an embodiment of the invention. In this embodiment, the combined power supply device 300 includes a main circuit 310 and a sub-circuit 320. The main circuit 310 and the sub-circuit 320 are detachably assembled. The main circuit 310 includes a transformer TR, a controller 312, a power switch Q, a capacitor C1, and an optocoupler 314. The capacitor C1 is coupled between the controller 312 and the ground GND1 of the main circuit 310. The first end of the optical coupler 314 is coupled to the first feedback pin PR1, so as to receive the feedback signal FS when the main circuit 310 and the sub-circuit 320 are assembled. The second end of the optical coupler 314 is coupled to the first reference pin PF1. The third end of the optocoupler 314 is coupled to the controller 312 and the first end of the capacitor C1. The fourth end of the photocoupler 314 is coupled to the ground GND1 of the main circuit 310 and the second end of the capacitor C1. The optocoupler 314 is configured to receive the feedback signal FS when the main circuit 310 and the sub-body circuit 320 are assembled, provide a feedback current according to the feedback signal FS, and charge the capacitor C1 with the feedback current, so that the capacitor C1 generates a charging voltage.

In this embodiment, the controller 312 receives the charging voltage and determines the change in the charging voltage. When the voltage value of the charging voltage decreases, the controller 312 increases the duty cycle of the driving signal SD, so that the transformer TR increases the power of the converted power supply Vt. On the other hand, when the voltage value of the charging voltage increases, the controller 312 reduces the duty cycle of the driving signal SD, so that the transformer TR reduces the power of the converted power supply Vt.

In this embodiment, the main circuit 310 may further include an auxiliary diode Daux and an auxiliary capacitor Caux. The transformer TR also includes an auxiliary winding Naux. The anode of the auxiliary diode Daux is coupled to the first end of the auxiliary winding Naux (such as the different-named end of the auxiliary winding Naux, that is, not dotted). The cathode of the auxiliary diode Daux is coupled to the controller 312. The first end of the auxiliary capacitor Caux is coupled to the cathode of the auxiliary diode Daux. The second end of the auxiliary capacitor Caux is coupled to the ground terminal GND1 of the main circuit 310 and the second end of the auxiliary winding Naux (such as the end of the same name of the auxiliary winding Naux, that is, a dot). After the transformer TR starts to operate, the power of the controller 312 may be provided by the auxiliary winding Naux, the auxiliary diode Daux, and the auxiliary capacitor Caux. In this embodiment, according to requirements, the main circuit 310 may further include an input circuit (not shown) coupled to the primary winding Np. The input circuit is a combined circuit including at least one of a filter, a bridge rectifier, a fuse, and an energy storage capacitor.

In this embodiment, the secondary circuit 320 includes an output circuit 322 and a feedback circuit 324. The implementation details of the output circuit 322 can be sufficiently taught in the embodiment of FIG. 3, and therefore will not be repeated here. The feedback circuit 324 is configured to receive the output power Vo when the sub-body circuit 320 and the main circuit 310 are assembled, and provide the feedback signal FS according to the voltage value of the output power Vo.

The implementation content of the feedback circuit 324 is described in detail. In this embodiment, the feedback circuit 324 can receive the output power Vo through the input terminal of the feedback circuit 324 and output the feedback signal FS to the second feedback pin through the input terminal of the feedback circuit 324 PR2. In this embodiment, the feedback circuit 324 may be a voltage regulator/feedback circuit based on the element TL431 (controllable precision voltage regulator source). The feedback circuit 324 includes resistors R1, R2, R3, capacitor Ccom, and element TL431. The first end of the resistor R1 is coupled to the output circuit 322 to receive the output power Vo. The first terminal of the resistor R1 can be used as the input terminal of the feedback circuit 324. The first end of the resistor R2 is coupled to the reference end of the element TL431 and the second end of the resistor R1. The second end of the resistor R2 is coupled to the ground GND2 of the secondary circuit 320 and the anode of the element TL431. The first end of the resistor R3 is coupled to the first end of the resistor R1. The second end of the resistor R3 is coupled to the second feedback pin PR2. The first end of the capacitor Ccom is coupled to the second end of the resistor R1. The second end of the capacitor Ccom is coupled to the cathode of the element TL431 and the second reference pin PF2.

In summary, the combined power supply device of the present invention includes a main circuit detachably assembled and a plurality of sub-body circuits. When one of the multiple secondary circuits is assembled with the main circuit, the secondary circuit provides output power according to the converted power from the transformer and provides a feedback signal according to the voltage value of the output power. The main circuit adjusts the driving signal in response to the change of the feedback signal, and drives the transformer according to the driving signal, so that the transformer provides the converted power associated with the change of the feedback signal. In this way, the adjustment range of the output power of the combined power supply device can be greatly improved. In addition, the sub-body circuit includes only the output circuit and the feedback circuit, while the transformer, power switch, and controller are provided in the main circuit, and the main circuit is shared. Therefore, the design complexity of the combined power supply device can be reduced. In addition, the combined power supply device provides a suitable output power according to the secondary circuit, thereby protecting the electronic device from being damaged by the power of the excessively converted power supply.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

100, 200, 300: combined power supply device 110, 210, 310: main circuit 112, 312: controller 120, 220_1, 220_2, 220_3, 320: secondary circuit 122, 322: output circuit 124, 324: feedback circuit 314: Optocoupler A1, A2: Part I C1, Ccom: capacitance Caux: auxiliary capacitor CC, CC_1, CC_2, CC_3: output power cord Co: output capacitance Daux: auxiliary diode Do: output diode FS: Feedback signal GND1: Ground terminal of the main circuit GND2: Ground terminal of the secondary circuit Naux: auxiliary winding Np: primary winding Ns: secondary winding PF1: first reference pin PF2: second reference pin PL1: the first plane PL2: second plane PP1: the first power pin PP2: second power supply pin PR1: the first feedback pin PR2: second feedback pin Q: Power switch R1, R2, R3, Rcs: resistance SD: drive signal TL431: Components TR: Transformer Vi: input power Vt: converted power supply Vo, Vo_1, Vo_2, Vo_3: output power

FIG. 1 is a schematic diagram of a combined power supply device according to an embodiment of the invention. 2 is a schematic diagram of another combined power supply device according to an embodiment of the invention. 3 is a schematic circuit diagram of a combined power supply device according to an embodiment of the invention. FIG. 4 is a schematic diagram of a pin configuration according to an embodiment of the invention. FIG. 5 is a schematic diagram of a first plane according to an embodiment of the invention. 6 is a schematic circuit diagram of a combined power supply device according to an embodiment of the invention.

100: combined power supply device

110: main circuit

112: Controller

120: Sub-body circuit

122: output circuit

124: Feedback circuit

Co: output capacitance

Do: output diode

FS: Feedback signal

GND1: Ground terminal of the main circuit

GND2: Ground terminal of the secondary circuit

Np: primary winding

Ns: secondary winding

PF1: first reference pin

PF2: second reference pin

PP1: the first power pin

PP2: second power supply pin

PR1: the first feedback pin

PR2: second feedback pin

Q: Power switch

Rcs: resistance

SD: drive signal

TR: Transformer

Vi: input power

Vo: output power

Vt: converted power supply

Claims (9)

A combined power supply device includes: a main circuit, including: a transformer; a controller configured to provide a driving signal and respond to a feedback signal change to adjust the driving signal; a power switch, coupled The transformer and the controller are configured to drive the transformer according to the driving signal, so that the transformer provides a converted power source associated with the change of the feedback signal; and a first provided in the main circuit case A first power pin, a first feedback pin, and a first reference pin of the plane; and a plurality of sub-body circuits, each configured to provide a plurality of output powers of different powers, respectively configured to communicate with the main body The circuit is detachably assembled, and each of the sub-body circuits includes: an output circuit configured to provide an output power source according to the converted power source when the sub-body circuit and the main circuit circuit are assembled; a feedback circuit, coupled Connected to the output circuit, configured to provide the feedback signal according to the voltage value of the output power source when the sub-body circuit and the main circuit are assembled; and respectively disposed on a second plane of the casing of the sub-body circuit A second power pin, a second feedback pin and a second reference pin, wherein when the main circuit and one of the sub-body circuits are assembled, the The first power pin contacts the second power pin, the first feedback pin contacts the second feedback pin, and the first reference pin contacts the second reference pin. The combined power supply device as described in item 1 of the patent application scope, wherein: when the voltage value of the feedback signal decreases, the controller increases the duty cycle of the driving signal, so that the transformer increases the power of the converted power supply , And when the voltage value of the feedback signal increases, the controller reduces the duty cycle of the driving signal, so that the transformer reduces the power of the converted power supply. The combined power supply device as described in item 1 of the patent scope, wherein the output circuit passes through the first power pin and the second power pin when the main circuit and one of the sub-body circuits are assembled The converted power is received, and the main circuit receives the feedback signal via the second feedback pin and the first feedback pin. The combined power supply device as described in item 3 of the patent application scope, wherein when the main circuit and one of the sub-body circuits are assembled, the first end of the secondary winding of the transformer is led through the first power supply Pin and the second power pin are coupled to the output circuit, and the second end of the secondary winding of the transformer is coupled to the ground of the secondary circuit via the first reference pin and the second reference pin . The combined power supply device according to item 1 of the patent application scope, wherein: the material of at least a first part of the first plane is a magnetic material, and the material of at least a second part of the second plane is a magnetic material, and One of the main circuit and the sub-body circuits is assembled by the magnetic force of at least a first part of the first plane and at least a second part of the second plane. The combined power supply device according to item 1 of the patent application scope, wherein: the first plane and the electrical contact surface of the first power pin, the electrical contact surface of the first feedback pin and the first The electrical contact surface of the reference pin is coplanar, the electrical contact surface of the second plane and the second power pin, the electrical contact surface of the second feedback pin, and the electrical property of the second reference pin The contact surface is coplanar. The combined power supply device as described in item 1 of the patent application scope, wherein the main circuit further includes: a capacitor coupled between the controller and the ground of the main circuit; and an optocoupler coupled The capacitor is configured to receive the feedback signal when the main circuit and one of the sub-body circuits are assembled, provide a feedback current according to the feedback signal, and charge the capacitor by the feedback current so that The capacitor generates a charging voltage. The combined power supply device as described in item 7 of the patent application scope, wherein: the controller also receives the charging voltage, and when the voltage value of the charging voltage decreases, the controller increases the duty cycle of the driving signal, so that The transformer increases the power of the converted power supply, and when the voltage value of the charging voltage increases, the controller reduces the duty cycle of the driving signal, so that the transformer reduces the power of the converted power supply. The combined power supply device as described in item 7 of the patent application range, wherein the first end of the optocoupler is coupled to the first feedback pin, and the second end of the optocoupler is coupled to the first reference Pin, the third end of the optocoupler is coupled to the controller and the first end of the capacitor, and the fourth end of the optocoupler is coupled to the ground end of the main circuit and the second end of the capacitor.

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