TW201128211A - Testing apparatus for power supply - Google Patents

Abstract

A testing apparatus for testing a power supply includes a load module, a switch module, a control module electrically coupled between the load module and the switch module, and an indicator module electrically coupled to the control module. The control module includes a judging module and a comparison module. The judging module receives voltage signals form the power supply, and is turned on when the power supply outputs voltage signals. The comparison module compares the voltage signals with a reference voltage, and outputs a control signal when the voltage signals are greater than the reference voltage. The indicator module receives the control signal and indicates the power supply is normal.

Description

201128211 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a test skirt, and more particularly to a power supply test device for a personal computer. [Prior Art] [0002] As a "power system" for a PC (Personal Computer), the power system provides the necessary power for the motherboard, keyboard, mouse, system clock, software switch, and remote wake-up of the PC network. The performance of the power system is the key to improving the usability and reliability of the PC system. 〇[0003] Therefore, it is especially necessary to carry out rigorous testing on the PC power supply. Usually, the power supply needs to perform a UVC (Undervoltage check, owed). The test of the pressure test), the so-called UVC test is to test the voltage value of each power supply to verify the stability of the output voltage of the power supply. The conventional power supply test method generally uses a dedicated power supply test device to test the power supply, and the test cost is high. SUMMARY OF THE INVENTION [0004] In view of the above inner valley, it is necessary to provide a low-cost power supply test device. [0005] A power supply test device includes a load module electrically connected to the power supply, a switch module electrically connected to the power supply, and an electrical connection to the load module a control module between the switch module and a command module electrically connected to the control module, the control module includes a - determination unit and a comparison unit, the determination unit is configured to receive from a power supply Corresponding voltage output voltage signal, and 099102903 0992005521-0 Form number A0HU 帛 4 pages / a total of 15 pages 201128211 When the voltage supply output of each of the power supply n has a voltage signal output, the comparison unit is used to Comparing the output voltage of the corresponding voltage output terminal with a reference voltage, and outputting the control voltage to the reference voltage output control signal to the finger 7F module at the voltage output terminal of the power supply device The supplier reads normally. _6] Compared with the S-known technology, the author of the authoring power supply device tests the output voltage of the power supply by the judgment unit 70 and the comparison unit, and the degree of automation is two and the cost is low. 〇 [实财式] _7] 4 Referring to the drawings, a preferred embodiment of the power supply test device of the present invention includes a power supply unit 〇〇, a load module 200, a switch module 300, a control module 400, and an indicator module. Group 5〇〇. The power supply 100 includes a plurality of voltage outputs for respectively outputting +5Vaux (+ 5¥ standby voltage), +5V, +3.3V, +12V, -12V, PS-〇N (Power Supply 〇n, The power is turned on) and the voltage signal of the PG (p〇wer G〇〇d 'power supply is normal). Π [0008] Please refer to FIG. 2' The load module 2 includes a resistor R1 R R11 and a linkage switch composed of switches SI ~ S3. The +5Vaux, +5v, +3.3V, +12V, and -12V voltage outputs are grounded via respective resistors R1~R5, respectively. The +5V voltage output terminal is electrically connected to the other end of the resistor R6 and R9 via the switch S1. The +3 3v voltage output terminal is electrically connected to the resistor R7 and the R1〇 terminal through the switch S2. R7 and R10 are grounded at the other end. The +12V voltage output terminal is electrically connected to the R8 and R11 terminals through the switch S3. The other ends of the resistors R8 and R11 are grounded. The switch module 30 includes a button switch S4 and a button. Relay, one or two poles 099102903 Form No. A0I01 Page 5 of 15 [0009] 201128211 =, - transistor τ, - operational amplifier A1, resistor R18 ~ R21 and electricity ° (4) electrical appliances include - coil components π and - often _ point element Κ 2. The element K1_ terminal and the two-pole thin cathode are electrically connected via the button switch S4 to the +5Vaux voltage output terminal, and also via the normally open contact element 1 (2 electrical Connect the +5Vaux voltage output terminal. The coil element is connected to the anode of the diode di and is electrically connected to the collector of the electric body τ. The emitter of the transistor τ is grounded. The base of the crystal τ is electrically connected to the operational amplifier through the resistor {{21 The non-inverting output terminal and the inverting input terminal of the operational amplifier Α1 are respectively connected to the capacitor C1 via the resistor R1 8. The in-phase output of the operational amplifier A1 and the inverting input terminal are further electrically connected via the resistors R19 and R20, respectively. The connection node between the normally open contact element K2 and the button switch S4 is connected. [0011] The control module 4 includes a determination unit 41 and a comparison unit 420. The determination unit 410 The resistors R12 R R16 and the photocouplers 1) 1 to U4 are included. Each of the photocouplers includes a light emitting element and a switching element. The first components of the photocoupler ΙΠ ~ U4 serve as input terminals of the corresponding photocouplers respectively. The voltage output terminals of the +5V, +3.3V, +12V and -12V are electrically connected via the corresponding resistors r 13 to R16. The switching elements of the photocouplers U1 to U4 are connected in series as the output terminals of the corresponding photocouplers. The comparison unit 420 includes a first comparison circuit 421 and a second comparison circuit 422. The first comparison circuit 421 includes comparators A2 to A4, a photocoupler U5, and resistors R28 to R30. The comparator A2 ~A4 non-inverting input The voltage output terminals of +5V, +3. 3V and +12V are electrically connected via corresponding resistors R26, R29 and R24 respectively. The in-phase input of the comparators A2 to A4 is 099102903 Form No. A0101 Page 6 / Total 15 Page 0992005521- 0 201128211

[0012]

The input terminals are also grounded via respective resistors R27, R30 and R25. The inverting input terminals of the comparators A2 to A4 are respectively configured to receive a reference voltage. The light-emitting element of the photoelectric coupler U5 is electrically connected as its input terminal to the output terminal. The switching element of the photo-combiner U5 is electrically connected between its switching terminals of the photocouplers U2 and U3. The second comparison circuit 422 includes a comparator A5, a voltage stabilizing diode ζρΐ, and resistors R17, R22, and R23. The non-inverting input of the comparator Α5 is electrically connected to the +5Vaux voltage output via a resistor R23. The non-inverting input of the comparator A5 is also electrically connected to the cathode of the Zener diode ZD1. The anode of the stable diode ZD1 is grounded. The anode of the Zener diode ZD1 is also electrically connected to the P$-0N voltage output terminal by the contact element K2. The inverting input terminal of the comparator A5 is electrically connected to the (eight) voltage output terminal via the resistor 22. The inverting input terminal of the comparator A5 is also grounded via a resistor R17. The output of the comparator A5 is electrically connected to the switch of the photocoupler U4. The finger module 500 includes the LEDs D2 and D3 and the resistor R12. The anodes of the light-emitting diodes D2, 1) 3 are connected to each other and electrically connected to the + 12V electrical calendar output via a resistor R12. The cathodes of the light-emitting diodes D2 and D3 are electrically connected to the switching elements of the photo-surface combiner U1.

[0013] When testing, according to FIG. 2, the power supply 1 to be tested is connected to the power supply testing device of the present invention, and the power supply 1 is connected to the load module 2, and the PS-ΟΝ voltage signal is connected. First output, then + 5Vaux, +5V, +3. 3V, +12V and -12V voltage signals are output sequentially. Press the button switch s4 once and release it. At this time, the potential of the non-inverting input terminal of the operational amplifier A1 rises rapidly to 5V, and the potential of the inverting input terminal rises slowly by 〇v. Operation 099102903 Form No. A0101 Page 7 of 15 Page 0992005521-0 201128211 The output of the amplifier A1 outputs a south potential of 5V so that the transistor T is turned on. The coil element Κ1 of the relay is energized so that the normally open contact element Κ2 is closed, and the coil element Κ1 is always energized so that the normally open contact element Κ 2 is always closed. If the +5V, +3. 3V, +12V, and -12V voltage outputs have a dust signal output, the light-emitting elements of the photocouplers U1 to U4 are respectively illuminated so that the corresponding switching elements are turned on. Since the +5Vaux voltage output terminal loads the 2.5V reference voltage through the resistor R23 and the Zener diode ZD1 at the non-inverting input terminal of the comparator A5, the inverting input terminals of the comparators A2~A4 respectively receive the same. 2. The reference voltage of 5V. The comparators A2 to A5 compare the +5V, +3.3V, +12V, and PG voltage signals in proportion to the reference voltage of 2. 5V. When the magnitudes of the +5V, +3.3V, and +12V voltage signals are normal, the output terminals of the comparators A2 to A4 output a high potential, and the light-emitting elements of the photocoupler U5 emit light so that the switching elements are turned on, when the size of the PG voltage signal Normally, the output of comparator A5 outputs a low potential. At this time, the anodes of the LEDs D2 and D3 in the indicator module 500 respectively receive an output voltage of +12 V, and the cathodes of the LEDs D2 and D3 are grounded via the judging unit 410 and the comparison unit 420, the LEDs. D2, D3 are energized to indicate whether the output of the power supply 100 is normal. [0014] 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 the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0015] FIG. 1 is a block diagram of a power supply testing device of the preferred embodiment of the present invention. 099102903 Form No. A0101 Page 8/15 pages 0992005521-0 201128211 Figure. 2 is a circuit diagram of a power supply testing device of the preferred embodiment of the present invention.

[Main component symbol description] [0017] Power supply: 100 [0018] Load module: 200 [0019] Switch module: 300 [0020] Control module: 400 [0021] Judging unit: 410 [0022] Comparison unit: 420 [0023] First comparison circuit: 421 [0024] Second comparison circuit: 422 [0025] Indication module: 500 [0026] Optocoupler: U1-U5 [0027] Operational Amplifier: A1 [0028] Comparator: A2 :~A5 [0029] Transistor: T [0030] Regulator Diode: ZD1 [0031] Diode: D1 [0032] LED: D2, D3 Form No. A0101 Page 9 of 15 099102903 0992005521-0 201128211 [0033] Switch: S1 ~ S3 [0034] Push button switch: S4 [0035] Coil element: K1 [0036] Normally open contact element: K2 [0037] Resistance: R1 ~ R30 [0038] Capacitance: C1 0992005521-0 099102903 Form No. A0101 Page 10 of 15

Claims (1)

201128211 VII. Patent application scope: 1. A power supply testing device, comprising a load module electrically connected to the power supply, a switch module electrically connected to the power supply, and an electrical connection The control module between the load module and the switch module and the indicator module electrically connected to the control module are improved in that the control module includes a determining unit and a comparing unit, The determining unit is configured to receive a voltage signal from a corresponding voltage output end of the power supply, and conduct a voltage when the voltage output of each of the power supply terminals has a voltage signal output, and the comparing unit is configured to use a corresponding voltage The output voltage of the output terminal is compared with a reference voltage, and an output voltage of each voltage output end of the power supply is higher than the reference voltage output control signal to the indicating module to display that the power supply is working normally. 2. The power supply testing device of claim 1, wherein the power supply comprises at least a first voltage output terminal and a second voltage output terminal, the determining unit comprising at least one first photoelectric device a coupler, the comparison unit includes at least one second photocoupler, each of the optocouplers includes an input end and an output end, and the input end of the first photocoupler is electrically connected to the second voltage An output end of the first photocoupler is grounded via an output end of the second photocoupler, and an input end of the second photocoupler is electrically connected to the first voltage output end, the switch The module is electrically connected to the first voltage output end. 3. The power supply testing device of claim 2, wherein the switch module comprises a push button switch, a relay, a switching element and a delay circuit, the relay comprising a coil component and a common Opening a contact element, wherein one end of the coil element is electrically connected to the 099102903 form number A0101, page 11 / 15 pages 0992005521-0 201128211, a voltage output end through which the other end of the coil element is The switching element is grounded, the delay circuit includes a first input end, a second input end and an output end, and the first input end of the delay circuit is electrically connected to the first voltage via the normally open contact element The second input end of the delay circuit is electrically connected to the second voltage output end via an input end of the first photocoupler, and an output end of the delay circuit is electrically connected to the switching element. 4. The power supply testing device of claim 3, wherein the determining unit further comprises at least one comparator, a first resistor and a second resistor, and the inverting input of the comparator is used. Receiving the reference voltage, the non-inverting input end of the comparator is electrically connected to the second voltage output end via the first resistor, and the non-inverting input end of the comparator is grounded via the second resistor, The output end of the comparator is electrically connected to the first voltage output end. 5. The power supply testing device of claim 3, wherein the delay circuit comprises a first operational amplifier, a third resistor, a fourth resistor, a fifth resistor, and a capacitor, The non-inverting input terminal and the inverting input terminal of the first operational amplifier are respectively electrically connected to one end of the third resistor and the fourth resistor, and the third resistor is electrically connected to the other end of the fourth resistor as the delay circuit An input terminal, the non-inverting input terminal and the inverting input terminal of the first operational amplifier are electrically connected to the fifth resistor and the capacitor end respectively, and the fifth resistor is electrically connected to the other end of the capacitor as the delay circuit And a second input end, the output end of the first operational amplifier is used as an output end of the delay circuit. 6. The power supply testing device of claim 5, wherein the switching element is an NPN type transistor, the base of the transistor is electrically 099102903, form number A0101, page 12 of 15 0992005521-0 201128211 is connected to the output end of the first operational amplifier, the collector of the transistor is electrically connected to the push button switch via the coil element, and the emitter of the transistor is grounded. 7. The power supply testing device of claim 5, wherein the power supply further includes a third voltage output terminal and a fourth voltage output terminal, the comparison unit further comprising a second operation An amplifier, a sixth resistor, and a voltage stabilizing diode, wherein the non-inverting input of the second operational amplifier is electrically connected to the first voltage output via the sixth resistor, and the non-inverting input of the second operational amplifier The anode is electrically connected to the cathode of the voltage stabilizing diode, the anode of the voltage stabilizing diode is grounded, and the anode of the voltage stabilizing diode is electrically connected to the anode via the normally open contact element a third voltage output terminal, the inverting input end of the second operational amplifier is electrically connected to the fourth voltage output end, and the output end of the second operational amplifier is electrically connected to the output end of the first optocoupler . 8. The power supply testing device of any one of claims 2 to 7, wherein the indicating module comprises at least one illuminating or sounding element, -»<*»»* L? Main 0· — /.I. IA Arts people enter.1» I am fascinated by I, 驭 驭 兀 干 干 , , , , , , , , ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ 0992005521-0 099102903 Form number Α0101 Page 13 of 15