POWER DETECTING CIRCUIT

• US 20150078048A1
• Filed: 09/17/2014
• Published: 03/19/2015
• Est. Priority Date: 09/17/2013
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: LIN, CHING-CHUNG
• Granted Patent: US 9,651,588 B2
• Time in Patent Office: Days
• US Class Current: 363/89
• CPC Class Codes: G01R 21/00 Arrangements for measuring electric power or power factor G01R7/12 takes precedence
• CPC Class Codes: G01R 21/06 by measuring current and voltage G01R21/08 - G01R21/133 take precedence
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C

Abstract

A power detecting circuit for a power supply module is disclosed. The power detecting circuit includes a current detecting module, a micro control unit (MCU), a correcting circuit. The current detecting module is electrically coupled to the power supply module and configured to detect an output current value of the power supply module. The micro control unit (MCU) is electrically coupled to the current detecting module. The correcting circuit is electrically coupled to the MCU and configured to correct the output current value of the power supply module. The MCU is configured to calculate an output power value of the power supply module according to the output current value and a preset output voltage value or a tested output voltage value of the power supply module and display the output power value via a display module.

Claims

1. A power detecting circuit for a power supply module, the power detecting circuit comprising:

a display module;

a current detecting module coupled to a power supply module and configured to detect an output current value thereof;

a micro control unit (MCU) coupled to the current detecting module and the display module; and

a correcting circuit coupled to the MCU, the correcting circuit configured to correct the output current value of the power supply module;

wherein the MCU is configured to calculate an output power value of the power supply module according to the output current value of the detected y the current detecting module and a preset output voltage value or a tested output voltage value of the power supply module;

and display the output power value via the display module.

2. The power detecting circuit of claim 1, wherein the correcting circuit comprises a first transistor, and a base terminal of the first transistor is electrically coupled to the MCU via a first resistor, a collector terminal of the first transistor is electrically coupled to the current detecting module via a second resistor, and an emitter terminal of the first transistor is grounded.

3. The power detecting circuit of claim 2, further comprising a second transistor and a third transistor, wherein an emitter terminal of the second transistor is electrically coupled to the current detecting module, one terminal of a third resistor is electrically coupled to the current detecting module, and another terminal of the third resistor is electrically coupled to a base terminal of the second transistor via a fourth resistor, a collector terminal of the second transistor is electrically coupled to a load;

one terminal of a fifth resistor is electrically coupled to the base terminal via the fourth resistor, and another terminal of the fifth resistor is electrically coupled to a collector terminal of the third transistor;

a base terminal of the third transistor is electrically coupled to the MCU via a sixth resistor, and an emitter of the third transistor is grounded.

4. The power detecting circuit of claim 3, wherein the first terminal is NPN-type transistor, the second transistor is PNP-type transistor, and the third transistor is NPN-type transistor.

5. The power detecting circuit of claim 1, further comprises a power meter, wherein the power meter is configured to detect an input power value of the power supply, and the MCU is configured to calculate a conversion efficiency according to the input power value and the output power value.

6. The power detecting circuit of claim 5, wherein the MCU is configured to determine whether the calculated conversion efficiency is equal to a preset conversion efficiency and output a report indicating whether the calculated conversion efficiency is equal to a preset conversion efficiency.

7. The power detecting circuit of claim 1, further comprising a storage, wherein the storage is configured to store a data inputted into the MCU.

8. The power detecting circuit of claim 1, further comprising a plurality of switches, wherein each of the plurality of switches is coupled to the MCU.

9. The power detecting circuit of claim 1, further comprising a voltage detecting module, wherein the voltage detecting module is configured to detect the output voltage value of the power supply module.

10. A power detecting circuit for a power supply module, the power detecting circuit comprising:

an alternating current (AC) power source configured to provide an AC voltage to the power supply module;

a current detecting module electrically coupled to the power supply module and configured to detect an output current value of the power supply module; and

a micro control unit (MCU) electrically coupled to the current detecting module;

wherein the MCU is configured to calculate an output power value of the power supply module according to the output current value and a preset output voltage value or a tested output voltage value of the power supply module and display the output power value via a display module.

11. The power detecting circuit of claim 10, further comprising a correcting circuit, wherein the correcting circuit is correctable to correct the output current value of the power supply module.

12. The power detecting circuit of claim 11, wherein the correcting circuit comprises a first transistor, and a base terminal of the first transistor is electrically coupled to the MCU via a first resistor, a collector terminal of the first transistor is electrically coupled to the current detecting module via a second resistor, and an emitter terminal of the first transistor is grounded.

13. The power detecting circuit of claim 12, further comprising a second transistor and a third transistor, wherein an emitter terminal of the second transistor is electrically coupled to the current detecting module, one terminal of a third resistor is electrically coupled to the current detecting module, and another terminal of the third resistor is electrically coupled to a base terminal of the second transistor via a fourth resistor, a collector terminal of the second transistor is electrically coupled to a load;

one terminal of a fifth resistor is electrically coupled to the base terminal via the fourth resistor, and another terminal of the fifth resistor is electrically coupled to a collector terminal of the third transistor;

a base terminal of the third transistor is electrically coupled to the MCU via a sixth resistor, and an emitter of the third transistor is grounded.

14. The power detecting circuit of claim 13, wherein the first terminal is NPN-type transistor, the second transistor is PNP-type transistor, and the third transistor is NPN-type transistor.

15. The power detecting circuit of claim 11, further comprises a power meter, wherein the power meter is configured to detect an input power value of the power supply, and the MCU is configured to calculate a conversion efficiency according to the input power value and the output power value.

16. The power detecting circuit of claim 15, wherein the MCU is configured to determine whether the calculated conversion efficiency is equal to a preset conversion efficiency and output a report indicating whether the calculated conversion efficiency is equal to a preset conversion efficiency.

17. The power detecting circuit of claim 11, further comprising a storage, wherein the storage is configured to store a data inputted into the MCU.

18. The power detecting circuit of claim 11, further comprising a plurality of switches, wherein each of the plurality of switches is coupled to the MCU.

19. The power detecting circuit of claim 11, further comprising a voltage detecting module, wherein the voltage detecting module is configured to detect the output voltage value of the power supply module.

20. The power detecting circuit of claim 11, further comprising a transformer, a filter module, and a amplifier, wherein the transformer is electrically coupled to the AC power source and configured to convert the AC voltage to a direct current (DC) voltage;

the filter module is electrically coupled to the transformer and configured to filter the DC voltage, and the amplify is electrically coupled to the filter module and MCU.