TWI425237B - Power supply device - Google Patents

Description

Power supply unit

The present invention relates to a power supply device, and more particularly to a power supply device for supplying a voltage to a circuit board.

With the rapid development of communication technology, the application of communication equipment has become more and more extensive. Among many communication devices, mobile phones have become one of the most popular communication devices in people's lives because of their convenient portability and instant messaging.

During the development of mobile phones, mobile phone boards need to be tested and debugged for stable performance. When detecting and debugging a mobile phone circuit board, it is first necessary to supply power to the mobile phone circuit board. Conventional power supplies are typically powered by a battery that matches the operating voltage of the mobile phone board. However, powering the battery only by the battery that matches the operating voltage of the mobile phone board is too singular, and the mobile phone board may not be powered because there is no matching battery.

In response to the above problems, mobile phone manufacturers typically use a wide range of output voltages and currents to regulate the power supply device to power the mobile phone circuit board. However, when there are many boards that need to be detected, in order to improve the detection efficiency, it is necessary to purchase a plurality of the above-mentioned power supply devices, thereby increasing the detection cost.

In view of the above, it is necessary to provide a power supply device that is low in cost and can be loaded with different voltage output units.

A power supply device for supplying power to a circuit board to be tested, wherein the power supply device can load a power output unit of different voltages, including a load unit, a power output unit, a voltage conversion unit, and a charging power source, a power output unit, a voltage conversion unit, and charging The power supply is electrically connected to the carrying unit, and the voltage converting unit determines whether the power of the power output unit is sufficient to supply power to the circuit board to be tested. When the power of the power output unit is insufficient to supply power to the circuit board to be tested, The voltage conversion unit charges the voltage input to the load cell to the matching voltage of the power output unit, and then charges the power output unit, and the voltage conversion unit can convert the output voltage of the power output unit to the circuit board to be tested. Within the operating voltage range.

Since the power supply device can stably supply power to the circuit board to be tested only by electrically connecting to the power output unit and the voltage conversion unit on the carrying unit, the cost is low. Moreover, since the voltage conversion unit is electrically connected to the carrying unit of the power supply device, when the power output unit does not match the operating voltage of the circuit board to be tested, the output voltage of the power output unit can be converted to the standby voltage by the voltage conversion unit. It can measure the working voltage range of the circuit board, so it can load the power output unit with different voltages.

50, 100‧‧‧ power supply unit

10, 60‧‧‧Device board to be tested

20, 70‧‧‧ Carrying unit

30, 80‧‧‧electric output unit

40‧‧‧Voltage conversion module

23‧‧‧ Output

231‧‧‧First joint

233‧‧‧ jack

11‧‧‧Second joint

13‧‧‧ Pins

71‧‧‧ input

95‧‧‧Charging power supply

75‧‧‧LED indicator

90‧‧‧Voltage conversion unit

1 is a functional block diagram of a power supply device according to Embodiment 1 of the present invention.

2 is a functional block diagram of a power supply device according to Embodiment 2 of the present invention.

The power supply device of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Bright.

Referring to FIG. 1 , the power supply device 50 of the first embodiment of the present invention is used for supplying power to the circuit board 10 to be tested, and includes a carrying unit 20 , a power output unit 30 , and a voltage conversion module 40 . The power output unit 30 and the voltage conversion module 40 are both soldered to the carrier unit 20 and are electrically connected to the carrier unit 20 . An output end 23 is disposed on the carrying unit 20, and the circuit board 10 to be tested is electrically connected to the output end 23. In this embodiment, the circuit board 10 to be tested is a mobile phone circuit board, and its working voltage is 3.6V~4.2V, the carrying unit 20 is a printed circuit board, the power output unit 30 is a battery, and the voltage conversion module 40 is a MAX8606 chip. It is used to convert the output voltage of the power output unit 30 into the operating voltage range of the mobile phone circuit board 10.

When the power supply device 50 is used to supply power to the circuit board 10, the output terminal 23 of the load bearing unit 20 is electrically connected to the circuit board 10 to be tested, and the voltage of the power output unit 30 is converted to the circuit board 10 to be tested by the voltage conversion module 40. After the operating voltage is within the range, the circuit board 10 to be tested is powered.

In order to facilitate the connection between the carrying unit 20 and the circuit board 10 to be tested for power supply, the output end 23 of the carrying unit 20 is electrically connected to an external first connector 231, and the first connector 231 is provided with two jacks 233, and An external second connector 11 is electrically connected to the circuit board 10 to be tested, and the second connector 11 is provided with two pins 13 respectively engaged with the two sockets 233. Of course, the first connector 231 can also be provided with a pin, and the second connector 11 is provided with a jack.

Since the power supply device 50 can stably supply power to the circuit board 10 to be tested only by electrically connecting to the power output unit 30 and the voltage conversion module 40 on the carrier unit 20, the cost is low. Furthermore, since the load-carrying unit 20 of the power supply device 50 is electrically connected to the voltage conversion The module 40 is configured to convert the output voltage of the power output unit 30 to the operating voltage of the circuit board 10 to be tested by the voltage conversion module 40 when the power output unit 30 does not match the operating voltage of the circuit board 10 to be tested. Within the range, the power output unit 30 of different voltages can be loaded.

Referring to FIG. 2, the power supply device 100 of the second embodiment of the present invention has a similar structure to the power supply device 50 of the first embodiment of the present invention, and the difference is that the power supply device 100 can be continuously used for ensuring sufficient power. An input end 71 is further provided on the carrying unit 70 of the power supply device 100. The input end 71 is electrically connected to the charging power source 95. In this embodiment, the charging power source 95 is connected to the input end 71 of the carrying unit 70 by a USB cable. When the power supply device 100 is used to supply power to the circuit board 60 to be tested, the voltage conversion unit 90 first determines whether the power of the power output unit 80 is sufficient to supply power to the circuit board 60 to be tested. When the power of the battery is insufficient to supply power to the circuit board 60 to be tested, the voltage is normal. The conversion unit 90 charges the power output unit 80 after the voltage input from the charging power source 95 to the load of the load unit 70 is switched to the matching voltage of the power output unit 80, and at the same time, the output voltage of the power output unit 80 is converted to the standby by the voltage conversion unit 90. After the operating voltage of the circuit board 60 is measured, the circuit board 60 to be tested is powered. The power supply device 100 includes a charging power source 95 that can charge the power output unit 80, so that the external power supply can be continuously performed.

In order to ensure that the current input from the charging power source 95 to the carrying unit 70 is stable, the carrying unit 70 is also electrically connected with a DIP switch (not shown) that limits the current input from the charging power source 95 to the carrying unit 70.

In order to determine whether the charging of the power output unit 80 is completed, the LED unit 75 is electrically connected to the carrying unit 70. When the charging of the power output unit 80 is completed, the LED indicator 75 is green.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

50‧‧‧Power supply unit

10‧‧‧Device board to be tested

20, 70‧‧‧ Carrying unit

30‧‧‧Power output unit

40‧‧‧Voltage conversion module

23‧‧‧ Output

231‧‧‧First joint

233‧‧‧ jack

11‧‧‧Second joint

13‧‧‧ Pins

Claims (7)

A power supply device for supplying power to a circuit board to be tested, comprising: a carrying unit and a power output unit electrically connected to the carrying unit, wherein the power supply device can load a power output unit with different voltages, and the power supply device further The voltage conversion unit and the charging power source are electrically connected to the carrying unit, and the voltage converting unit determines whether the power of the power output unit is sufficient to supply power to the circuit board to be tested. When the power of the output unit is insufficient to supply power to the circuit board to be tested, the voltage conversion unit charges the voltage input to the load cell to the matching voltage of the power output unit, and then charges the power output unit, and the battery is charged. The output voltage of the output unit is converted to the operating voltage range of the circuit board to be tested. The power supply device of claim 1, wherein the voltage conversion unit is a MAX8606 wafer. The power supply device of claim 1, wherein the circuit board to be tested is a mobile phone circuit board. The power supply device of claim 1, wherein the charging power source is connected to the carrying unit by a USB cable. The power supply device of claim 1, wherein the carrying unit is further electrically connected with a DIP switch for limiting a current transmitted from the charging power source to the carrying unit. The power supply device of claim 1, wherein the carrying unit is electrically connected to an LED indicator indicating that the charging of the power output unit is completed. The power supply device of claim 1, wherein the carrying unit is electrically connected to the first connector, and the circuit board to be tested is electrically connected to the second connector that is coupled to the first connector.