CN108303637A - A kind of detection device and method of step-down switching type integrated voltage-stabilized chip - Google Patents
A kind of detection device and method of step-down switching type integrated voltage-stabilized chip Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The present invention relates to a kind of detection devices and method of step-down switching type integrated voltage-stabilized chip, belong to detection technique field.The present invention include power module, external circuit module, IC, pin handover module, voltage sample module, microcontroller, key-press module, LCD MODULE and controlled by sound and light module；Power module, external circuit module, voltage sample module, microcontroller are sequentially connected, IC, pin handover module, external circuit module be sequentially connected, pin handover module, key-press module, LCD MODULE and controlled by sound and light module are connect with microcontroller simultaneously；The present invention inputs chip model by key-press module, and the quality of chip is prompted by liquid crystal display and sound and light signal, it is capable of the quality of quickly and conveniently detection chip, when avoiding in circuit using multimeter detection chip quality, the accident of wafer damage is caused to occur due to inadvertent, meanwhile it is simple in structure, it is easy to operate.
Description
Technical field
The present invention relates to a kind of detection devices and method of step-down switching type integrated voltage-stabilized chip, belong to switch power technology
Field.
Background technology
Currently, in switch power technology field, the application of step-down switching integrated voltage-stabilized chip is more frequent, and is being depressured
The failure occurred in circuit build process is more, and people survey the current potential of each pin of chip to judge chip usually using multimeter
Quality, still, in detection process, since distance is closer between chip pin, people are short by adjacent pin due to error
Road and so that the thing of wafer damage is happened occasionally, so as to cause circuit malfunction, bring certain economic loss.
Invention content
The technical problem to be solved by the present invention is to：The present invention provides a kind of detection dress of step-down switching type integrated voltage-stabilized chip
It sets and method, for solving the problems, such as that step-down switching integrated voltage-stabilized chip quality detects；It avoids and uses multimeter in circuit
When detection chip quality, the accident of wafer damage is caused to occur due to inadvertent.
The present inventors inputs chip model to microcontroller by key-press module and 1602 LCD MODULEs, and microcontroller is defeated
Go out to control the pin of signal switching chip and accessed external circuit, so that chip is worked under the cooperation of external circuit, microcontroller is logical
The voltage signal crossed between each pin of A/D sampling A/D chips judges the quality of chip, and the display chip on liquid crystal display
Working condition, and prompt according to sound and light signal the quality of chip.
The technical scheme is that：A kind of detection device of step-down switching type integrated voltage-stabilized chip, including power module 1,
External circuit module 2, IC seats 3, pin handover module 4, voltage sample module 5, IAP microcontrollers 6, key-press module 7,1602 liquid crystals
Show module 8 and controlled by sound and light module 9；The power module 1, external circuit module 2, voltage sample module 5, IAP microcontrollers 6 are successively
Connection, IC seats 3, pin handover module 4, external circuit module 2 are sequentially connected, pin handover module 4, key-press module 7,1602 liquid crystal
Display module 8 and controlled by sound and light module 9 are connect with IAP microcontrollers 6 simultaneously；
The power module 1 includes transformer 10, rectifier bridge 11, capacitance C1, C2, LM7812 integrated stable voltage circuit 12；It is described
220V alternating currents pass sequentially through after the decompression of transformer 10,11 rectification of rectifier bridge, capacitance C1, C2 filtering with LM7812 integrated voltage-stabilized electricity
1 foot on road 12 and the connection of 2 feet, the voltage of output+12V is as external circuit mould between 3 feet and 2 feet of LM7812 integrated stable voltage circuits 12
The power supply of block 2；
The external circuit module 2 includes capacitance C3, C4, C5, C6, Schottky diode IN5822, inductance L, resistance R1, R2；Institute
State between 3 feet of LM7812 integrated stable voltage circuits 12 and 2 feet in parallel capacitance C3, C4 successively, the moon of Schottky diode IN5822
Pole is connect with one end of inductance L, the plus earth of Schottky diode IN5822；The other end of inductance L is in parallel successively between ground
Filter capacitor C5, C6, the both ends of capacitance C6 are connected in parallel on after resistance R1, R2 series connection, the both ends after resistance R1, R2 series connection are as outer
One end of the output end Uo of circuit module 2, resistance R1 are connect with the anode of output end Uo, and one end of resistance R2 is with output end Uo's
Cathode connects；
The pin handover module 4 includes that mono- 8 channel number words of CD4051 control mono- 8 channel number word of simulant electronic switch I, CD4051
Control the mono- 8 channel number word controls of mono- 8 channel number word control simulant electronic switch III, the CD4051 of simulant electronic switch II, CD4051
The mono- 8 channel number word control simulant electronic switch V of simulant electronic switch IV, CD4051；Mono- 8 channel number words of CD4051 control mould
The ends COM of quasi- electronic switch I, II, III, IV, V are connect with the terminal of IC seats 31,2,3,4,5 respectively；Mono- 8 port numbers of CD4051
The vdd terminal of word control simulant electronic switch I, II, III, IV, V are connect after connecting simultaneously with+5V power supplys, mono- 8 port numbers of CD4051
The ends VEE, the ends VSS, the ends INH of word control simulant electronic switch I, II, III, IV, V are grounded after connecting simultaneously；CD4051 mono- 8 is logical
It is connect with one end of capacitance C4 after the ends the Y0 connection of road digital control simulant electronic switch I, II, III, IV, V, capacitance C4's is another
One end is grounded；It is grounded after the ends the Y1 connection of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051,
After the ends the Y2 connection of CD4051 mono- 8 channel number word control simulant electronic switches I, II, III, IV, V with two pole of IN5822 Schottky
The cathode of pipe connects, the ends Y3 of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051 connect after with resistance
The connecting pin of R1, R2 connect, and the ends Y4 of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051 connect successively
It connects；A, B of CD4051 mono- 8 channel number word control simulant electronic switches I, C-terminal respectively connected IAP microcontrollers 6 P2.5,
The end P2.4, P2.3 connects, and A, B of the mono- 8 channel number word control simulant electronic switch II of CD4051, C-terminal respectively connected IAP monolithics
The end P2.2, P2.1, P2.0 of machine 6 connects, and A, B of the mono- 8 channel number word control simulant electronic switch III of CD4051, C-terminal connect respectively
Then the end P4.5, P2.7, P2.6 connection of IAP microcontrollers 6, the A of the mono- 8 channel number word control simulant electronic switch IV of CD4051,
B, C-terminal respectively connected the end P3.4, P3.3, P3.2 connection of IAP microcontrollers 6, and mono- 8 channel number words of CD4051 control simulation electronic
A, B of switch V, C-terminal respectively connected the end P1.7, P1.6, P1.5 connection of IAP microcontrollers 6；
The end Y0, Y1, Y2, Y3, Y4 difference of described mono- 8 channel number word control simulant electronic switch I, II, III, IV, V of CD4051
It is connect with the input terminal of external circuit module 2, ground terminal, output end, feedback end, control terminal；（Specific connection type see the preceding paragraph with
And the specific descriptions in next section）；
The voltage sample module 5 includes resistance R3, R4, R5, R6；It is connected in parallel on external circuit module 2 after resistance R3, R4 series connection
The both ends of output end Uo, the connecting pin of resistance R3, R4 are connect with the ends P1.2 of IAP microcontrollers 6, the ends P1.0 of IAP microcontrollers 6 with
The connecting pin of resistance R1, R2 connect；The mono- 8 channel number word control simulant electronic switches of CD4051 are connected in parallel on after resistance R5, R6 series connection
I, the ends Y4 and the ends Y1 of II, III, IV, V, the connecting pin of resistance R5, R6 are connect with the ends P1.1 of IAP microcontrollers 6.
The key-press module 7 include CH452 driving chips 13, button KEY0, KEY1, KEY2, KEY3, KEY4, KEY5,
KEY6, KEY7, KEY8, KEY9, KEY10, KEY11, resistance R8, R9, R10, R11, R12, R13, R14, R15, R16, R17；Institute
Connected by the ends SEG0 of resistance R15 and CH452 driving chips 13 after stating one end connection of button KEY0, KEY1, KEY2, KEY3
It connects, is connected by the ends SEG1 of resistance R16 and CH452 driving chips 13 after one end connection of button KEY4, KEY5, KEY6, KEY7
It connects, passes through the ends SEG2 of resistance R17 and CH452 driving chips 13 after one end connection of button KEY8, KEY9, KEY10, KEY11
Connection；Connected by the ends DIG3 of resistance R14 and CH452 driving chips 13 after the other end connection of button KEY0, KEY4, KEY8
It connects, is connect with the ends DIG2 of CH452 driving chips 13 by resistance R13 after the other end connection of button KEY1, KEY5, KEY9,
It is connect, is pressed with the ends DIG1 of CH452 driving chips 13 by resistance R12 after the other end connection of button KEY2, KEY6, KEY10
It is connect with the ends DIG0 of CH452 driving chips 13 by resistance R11 after the other end connection of key KEY3, KEY7, KEY11, CH452
The ends H3L2 of driving chip 13, the ends GND ground connection, the ends ADRR, the ends VCC of CH452 driving chips 13 are connect with+5V power ends,
The ends INT of CH452 driving chips 13, the ends SDA, the ends SCL respectively by the ends P3.7 of resistance R8, R9, R10 and IAP microcontroller 6,
The ends P1.4, the connection of the ends P1.3.
The ends D0 of 1602 liquid crystal display 8, the ends D1, the ends D2, the ends D3, the ends D4, the ends D5, the ends D6, the ends D7, the ends RS, RW
End, the ends E respectively with the ends P0.0 of IAP microcontrollers 6, the ends P0.1, the ends P0.2, the ends P0.3, the ends P0.4, the ends P0.5, the ends P0.6, P0.7
End, the ends P4.4, the ends P4.2, the connection of the ends P4.1；With 1602 after being filtered by shunt capacitance C8, C9 successively between+5V power ends and ground
The vdd terminal of liquid crystal display 8 is connected with the ends VSS, the vdd terminals of 1602 liquid crystal displays 8 and the ends BLA with connect, the ends VSS with
The ends BLK connect, and the vdd terminal of 1602 liquid crystal displays 8, the ends VL, the ends VSS are connect with 1 foot of potentiometer RW, 2 feet, 3 feet respectively.
The controlled by sound and light module 9 includes buzzer 14, LED light, capacitance C7, resistance R7, triode T；+ the 5V
By being connect with the ends VCC of IAP microcontrollers 6 and the ends GND after shunt capacitance C7 between power end and ground, the ends P5.5 of IAP microcontrollers 6
It is connect simultaneously with the base stage of the anode of LED light, triode T by resistance R7, the minus earth of LED light, triode T
Emitter ground connection, the collector of triode T connect by buzzer 14 with+5V power ends.
The method for carrying out the detection of step-down switching type integrated voltage-stabilized chip using above-mentioned apparatus, the method for the detection are：It is logical
It crosses key-press module 7 and inputs the chip model of step-down switching type integrated voltage-stabilized chip to be detected to IAP microcontrollers 6, IAP microcontrollers
6 output corresponding low and high level signals control pin handover module 4 switches pin so that 5 pins of IC seats 3 respectively with outside
Corresponding port connection, makes chip to be detected work under the cooperation of outer circuit module 2, IAP microcontrollers 6 are logical in circuit module 2
It crosses A/D and samples the voltage signal between each pin of chip to be detected to judge the quality of chip, and on 1602 liquid crystal displays 8
The working condition of display chip, and prompt according to sound and light signal the quality of chip.
The reason of pin switching is carried out in the present invention is：Due to different model step-down switching type integrated voltage-stabilized chip its
Pin function definition is different, but its external circuit tested is identical, in order in the same external circuit module 2
The quality for testing step-down switching type integrated voltage-stabilized chip, needs pin handover module 4 to step-down switching type integrated voltage-stabilized chip
Pin switches over.
The beneficial effects of the invention are as follows：
The present invention provides a kind of detection device and method of step-down switching type integrated voltage-stabilized chip, and people are inputted by key-press module
Chip model, and prompt by liquid crystal display and sound and light signal the quality of chip, being capable of quickly and conveniently detection chip
Quality leads to the accident of wafer damage due to inadvertent when avoiding in circuit using multimeter detection chip quality
Occur, meanwhile, it is simple in structure, it is easy to operate.
Description of the drawings
Fig. 1 is the principle of the present invention block diagram；
Fig. 2 is the circuit diagram of the present invention.
Each label in Fig. 1~2：1- power modules, 2- external circuit module, 3-IC, 4- pins handover module, 5- voltages adopts
Egf block, 6-IAP microcontrollers, 7- key-press modules, 8-1602 LCD MODULEs, 9- controlled by sound and light module, 10- transformers, 11-
Rectifier bridge, 12-LM7812 integrated stable voltage circuits, 13-CH452 driving chips, 14- buzzers, LED-LED indicator lights, R1~
R17- resistance, C1~C9- capacitances, KEY0~KEY11- buttons, L- inductance, IN5822- Schottky diodes, CD4051- mono- 8 are logical
The digital control simulant electronic switch in road, T- triodes, RW- potentiometers.
Specific implementation mode
In the following with reference to the drawings and specific embodiments, the invention will be further described.
Embodiment 1：As shown in Fig. 1~2, a kind of detection device of step-down switching type integrated voltage-stabilized chip, including power supply mould
Block 1, external circuit module 2, IC seats 3, pin handover module 4, voltage sample module 5, IAP microcontrollers 6, key-press module 7,1602 liquid
Brilliant display module 8 and controlled by sound and light module 9；The power module 1, external circuit module 2, voltage sample module 5, IAP microcontrollers 6
It is sequentially connected, IC seats 3, pin handover module 4, external circuit module 2 are sequentially connected, pin handover module 4, key-press module 7,1602
LCD MODULE 8 and controlled by sound and light module 9 are connect with IAP microcontrollers 6 simultaneously；
The power module 1 includes transformer 10, rectifier bridge 11, capacitance C1, C2, LM7812 integrated stable voltage circuit 12；It is described
220V alternating currents pass sequentially through after the decompression of transformer 10,11 rectification of rectifier bridge, capacitance C1, C2 filtering with LM7812 integrated voltage-stabilized electricity
1 foot on road 12 and the connection of 2 feet, the voltage of output+12V is as external circuit mould between 3 feet and 2 feet of LM7812 integrated stable voltage circuits 12
The power supply of block 2；
The external circuit module 2 includes capacitance C3, C4, C5, C6, Schottky diode IN5822, inductance L, resistance R1, R2；Institute
State between 3 feet of LM7812 integrated stable voltage circuits 12 and 2 feet in parallel capacitance C3, C4 successively, the moon of Schottky diode IN5822
Pole is connect with one end of inductance L, the plus earth of Schottky diode IN5822；The other end of inductance L is in parallel successively between ground
Filter capacitor C5, C6, the both ends of capacitance C6 are connected in parallel on after resistance R1, R2 series connection, the both ends after resistance R1, R2 series connection are as outer
One end of the output end Uo of circuit module 2, resistance R1 are connect with the anode of output end Uo, and one end of resistance R2 is with output end Uo's
Cathode connects；
The pin handover module 4 includes that mono- 8 channel number words of CD4051 control mono- 8 channel number word of simulant electronic switch I, CD4051
Control the mono- 8 channel number word controls of mono- 8 channel number word control simulant electronic switch III, the CD4051 of simulant electronic switch II, CD4051
The mono- 8 channel number word control simulant electronic switch V of simulant electronic switch IV, CD4051；Mono- 8 channel number words of CD4051 control mould
The ends COM of quasi- electronic switch I, II, III, IV, V are connect with the terminal of IC seats 31,2,3,4,5 respectively；Mono- 8 port numbers of CD4051
The vdd terminal of word control simulant electronic switch I, II, III, IV, V are connect after connecting simultaneously with+5V power supplys, mono- 8 port numbers of CD4051
The ends VEE, the ends VSS, the ends INH of word control simulant electronic switch I, II, III, IV, V are grounded after connecting simultaneously；CD4051 mono- 8 is logical
It is connect with one end of capacitance C4 after the ends the Y0 connection of road digital control simulant electronic switch I, II, III, IV, V, capacitance C4's is another
One end is grounded；It is grounded after the ends the Y1 connection of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051,
After the ends the Y2 connection of CD4051 mono- 8 channel number word control simulant electronic switches I, II, III, IV, V with two pole of IN5822 Schottky
The cathode of pipe connects, the ends Y3 of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051 connect after with resistance
The connecting pin of R1, R2 connect, and the ends Y4 of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051 connect successively
It connects；A, B of CD4051 mono- 8 channel number word control simulant electronic switches I, C-terminal respectively connected IAP microcontrollers 6 P2.5,
The end P2.4, P2.3 connects, and A, B of the mono- 8 channel number word control simulant electronic switch II of CD4051, C-terminal respectively connected IAP monolithics
The end P2.2, P2.1, P2.0 of machine 6 connects, and A, B of the mono- 8 channel number word control simulant electronic switch III of CD4051, C-terminal connect respectively
Then the end P4.5, P2.7, P2.6 connection of IAP microcontrollers 6, the A of the mono- 8 channel number word control simulant electronic switch IV of CD4051,
B, C-terminal respectively connected the end P3.4, P3.3, P3.2 connection of IAP microcontrollers 6, and mono- 8 channel number words of CD4051 control simulation electronic
A, B of switch V, C-terminal respectively connected the end P1.7, P1.6, P1.5 connection of IAP microcontrollers 6；
The end Y0, Y1, Y2, Y3, Y4 difference of described mono- 8 channel number word control simulant electronic switch I, II, III, IV, V of CD4051
It is connect with the input terminal of external circuit module 2, ground terminal, output end, feedback end, control terminal；（Specific connection type see the preceding paragraph with
And the specific descriptions in next section）；
The voltage sample module 5 includes resistance R3, R4, R5, R6；It is connected in parallel on external circuit module 2 after resistance R3, R4 series connection
The both ends of output end Uo, the connecting pin of resistance R3, R4 are connect with the ends P1.2 of IAP microcontrollers 6, the ends P1.0 of IAP microcontrollers 6 with
The connecting pin of resistance R1, R2 connect；The mono- 8 channel number word control simulant electronic switches of CD4051 are connected in parallel on after resistance R5, R6 series connection
I, the ends Y4 and the ends Y1 of II, III, IV, V, the connecting pin of resistance R5, R6 are connect with the ends P1.1 of IAP microcontrollers 6.
Further, the key-press module 7 include CH452 driving chips 13, button KEY0, KEY1, KEY2, KEY3,
KEY4, KEY5, KEY6, KEY7, KEY8, KEY9, KEY10, KEY11, resistance R8, R9, R10, R11, R12, R13, R14, R15,
R16、R17；Pass through resistance R15 and CH452 driving chips 13 after one end connection of described button KEY0, KEY1, KEY2, KEY3
The ends SEG0 connect, and pass through resistance R16 and CH452 driving chips 13 after one end connection of button KEY4, KEY5, KEY6, KEY7
The ends SEG1 connect, and pass through resistance R17 and CH452 driving chip 13 after one end connection of button KEY8, KEY9, KEY10, KEY11
The ends SEG2 connection；Pass through resistance R14 and CH452 driving chips 13 after the other end connection of button KEY0, KEY4, KEY8
The ends DIG3 connect, and pass through the DIG2 of resistance R13 and CH452 driving chips 13 after the other end connection of button KEY1, KEY5, KEY9
End connection passes through the ends DIG1 of resistance R12 and CH452 driving chips 13 after the other end connection of button KEY2, KEY6, KEY10
Connection is connected after the other end connection of button KEY3, KEY7, KEY11 by the ends DIG0 of resistance R11 and CH452 driving chips 13
It connects, the ends H3L2 of CH452 driving chips 13, the ends GND ground connection, the ends ADRR, the ends VCC and the+5V power ends of CH452 driving chips 13
Connection, the ends INT, the ends SDA, the ends SCL of CH452 driving chips 13 pass through resistance R8, R9, R10 and IAP microcontroller 6 respectively
The ends P3.7, the ends P1.4, the connection of the ends P1.3.
Further, the ends D0, the ends D1, the ends D2, the ends D3, the ends D4, the ends D5, the ends D6 of 1602 liquid crystal display 8, D7
End, the ends RS, the ends RW, the ends E respectively with the ends P0.0 of IAP microcontrollers 6, the ends P0.1, the ends P0.2, the ends P0.3, the ends P0.4, the ends P0.5,
The ends P0.6, the ends P0.7, the ends P4.4, the ends P4.2, the connection of the ends P4.1；It is filtered by shunt capacitance C8, C9 successively between+5V power ends and ground
Connect with the vdd terminal of 1602 liquid crystal displays 8 and the ends VSS after wave, the vdd terminals of 1602 liquid crystal displays 8 and the ends BLA with connect,
Its end VSS is connect with the ends BLK, the vdd terminals of 1602 liquid crystal displays 8, the ends VL, the ends VSS respectively with 1 foot of potentiometer RW, 2 feet, 3
Foot connects.
Further, the controlled by sound and light module 9 includes buzzer 14, LED light, capacitance C7, resistance R7, triode
T；By being connect with the ends VCC of IAP microcontrollers 6 and the ends GND after shunt capacitance C7 between the+5V power ends and ground, IAP microcontrollers
6 ends P5.5 are connect with the base stage of the anode of LED light, triode T simultaneously by resistance R7, and the cathode of LED light connects
Ground, the emitter ground connection of triode T, the collector of triode T are connect by buzzer 14 with+5V power ends.
The method for carrying out the detection of step-down switching type integrated voltage-stabilized chip using above-mentioned apparatus, the method for the detection are：It is logical
It crosses key-press module 7 and inputs the chip model of step-down switching type integrated voltage-stabilized chip to be detected to IAP microcontrollers 6, IAP microcontrollers
6 output corresponding low and high level signals control pin handover module 4 switches pin so that 5 pins of IC seats 3 respectively with outside
Corresponding port connection, makes chip to be detected work under the cooperation of outer circuit module 2, IAP microcontrollers 6 are logical in circuit module 2
It crosses A/D and samples the voltage signal between each pin of chip to be detected to judge the quality of chip, and on 1602 liquid crystal displays 8
The working condition of display chip, and prompt according to sound and light signal the quality of chip.
The reason of pin switching is carried out in the present invention is：Due to different model step-down switching type integrated voltage-stabilized chip its
Pin function definition is different, but its external circuit tested is identical, in order in the same external circuit module 2
The quality for testing step-down switching type integrated voltage-stabilized chip, needs pin handover module 4 to step-down switching type integrated voltage-stabilized chip
Pin switches over.
Further, the detection method is as follows：
A, 6 storage inside of the IAP microcontrollers pin information of a variety of step-down switching type integrated voltage-stabilized chips；
B, by the IC of the insertion in order seats 3 of step-down switching type integrated voltage-stabilized chip；
C, power on, the model for being detected chip is inputted on key-press module 7, and shown on 1602 LCD MODULEs 8
The chip model inputted；
D, IAP microcontrollers 6 export corresponding low and high level signal according to the chip model that key-press module 7 is inputted and control pin
A, B, C-terminal in handover module 4, to pin handover module 4 switch pin make 5 pins of IC seats 3 respectively with external circuit
Corresponding port connection in module 2；
The end Y0, Y1, Y2, Y3, Y4 of pin handover module 4 respectively with the input terminal of external circuit module 2, ground terminal, output end, anti-
Present end, control terminal connection；If desired when the ends COM of the mono- 8 channel number word control simulant electronic switches of CD4051 are connect with the ends Y0,
2 corresponding ports of IAP microcontrollers output signal to A, B of the mono- 8 channel number word control simulant electronic switches of CD4051, C-terminal, CD4051
A, B of single 8 channel number words control simulant electronic switch, C-terminal are respectively low level, low level, low level signal；If desired
When the ends COM of the mono- 8 channel number word control simulant electronic switches of CD4051 are connect with the ends Y1,2 corresponding ports of IAP microcontrollers output letter
A, B, C-terminal number to CD4051 mono- 8 channel number word control simulant electronic switches, the mono- 8 channel number word control simulation electronics of CD4051
A, B of switch, C-terminal are respectively high level, low level, low level signal；If desired the mono- 8 channel number word control simulation electricity of CD4051
When the ends COM of sub switch are connect with the ends Y2,2 corresponding ports of IAP microcontrollers output signal to the mono- 8 channel number word control moulds of CD4051
A, B of quasi- electronic switch, C-terminal, A, B of the mono- 8 channel number word control simulant electronic switches of CD4051, C-terminal are respectively low level, height
Level, low level signal；If desired when the ends COM of the mono- 8 channel number word control simulant electronic switches of CD4051 are connect with the ends Y3,
2 corresponding ports of IAP microcontrollers output signal to A, B of the mono- 8 channel number word control simulant electronic switches of CD4051, C-terminal, CD4051
A, B of single 8 channel number words control simulant electronic switch, C-terminal are respectively high level, high level, low level signal；If desired
When the ends COM of the mono- 8 channel number word control simulant electronic switches of CD4051 are connect with the ends Y4,2 corresponding ports of IAP microcontrollers output letter
A, B, C-terminal number to CD4051 mono- 8 channel number word control simulant electronic switches, the mono- 8 channel number word control simulation electronics of CD4051
A, B of switch, C-terminal are respectively low level, low level, high level signal；
Since the permutation and combination situation of chip pin there are 25 kinds, accordingly enumerates one of which chip situation and said
It is bright, it is specific as follows：
When detected chip pin 1~5 is respectively input terminal, ground terminal, output end, feedback end, control terminal, IAP monolithics
The end P2.5, P2.4, P2.3 of machine 6 exports low level, low level, low level signal and is controlled to mono- 8 channel number words of CD4051 respectively
A, B of simulant electronic switch I, C-terminal, the ends COM of single 8 channel number words control simulant electronic switch I and Y0 terminations are logical；IAP monolithics
The end P2.2, P2.1, P2.0 of machine 6 exports high level, low level, low level signal and is controlled to mono- 8 channel number words of CD4051 respectively
A, B of simulant electronic switch II, C-terminal, the ends COM of single 8 channel number words control simulant electronic switch II and Y1 terminations are logical；IAP is mono-
The end P4.5, P2.7, P2.6 of piece machine 6 exports low level, high level, low level signal and gives CD4051 mono- 8 channel number word controls respectively
A, B of simulant electronic switch III processed, C-terminal, the ends COM of single 8 channel number words control simulant electronic switch III and Y2 terminations are logical；
The end P3.4, P3.3, P3.2 of IAP microcontrollers 6 exports high level, high level, low level signal and gives CD4051 mono- 8 port numbers respectively
Word controls A, B of simulant electronic switch IV, C-terminal, and the ends COM of single 8 channel number words control simulant electronic switch IV and Y3 terminations are logical；
The end P1.7, P1.6, P1.5 of IAP microcontrollers 6 exports low level, low level, high level signal and gives CD4051 mono- 8 port numbers respectively
Word controls A, B of simulant electronic switch V, C-terminal, and the ends COM of single 8 channel number words control simulant electronic switch V and Y4 terminations are logical；
E, the voltage sampled is transmitted to IAP microcontrollers 6 by voltage sample module 5, if the control terminal for being detected chip is high level
Effectively, it is shown when the ends P1.1 of IAP microcontrollers 6 detect high level signal, on 1602 LCD MODULEs 8 and is detected chip control
The voltage at end processed, detected chip can work normally；Then, the ends P1.0 of IAP microcontrollers 6 detect the electricity of 1.2V~1.5V
When ordinary mail, illustrate that the feedback terminal voltage of chip under test is correct, when the ends P1.2 of IAP microcontrollers 6 detect+4V~+6V voltages,
Illustrate that the output voltage of chip under test is correct, at this point, the ends P5.5 of IAP microcontrollers 6 export low level signal, LED light is not
Shine, buzzer not sounding, " SUCCESS " shown on 1602 LCD MODULEs 8, illustrate it is tested correctly；If IAP microcontrollers 2
The ends P1.0, the signal that detects of the ends P1.2 be unsatisfactory for above-mentioned condition, then the ends P5.5 of IAP microcontrollers 6 export high level signal,
LED light shines, buzzer sends out prompting sound, and " ERROR " is shown on 1602 LCD MODULEs 8, illustrates that chip under test damages
It is bad；
If the control terminal for being detected chip is that high level is effective, but the ends P1.1 of IAP microcontrollers 6 detect low level signal
When, on 1602 LCD MODULEs 8 display be detected the voltage of chip controls end, detected chip is turned off, and chip cannot be just
The ends P5.5 of often work, IAP microcontrollers 6 export high level signal, and LED light shines, buzzer sends out prompting sound, 1602 liquid
" ERROR " is shown on brilliant display module 8, illustrates that chip under test damages；
F, it is completed, closes power supply.
Specific embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned realities
Example is applied, it within the knowledge of a person skilled in the art, can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (5)
1. a kind of detection device of step-down switching type integrated voltage-stabilized chip, it is characterised in that：Including power module（1）, external circuit
Module（2）, IC（3）, pin handover module（4）, voltage sample module（5）, IAP microcontrollers（6）, key-press module（7）、1602
LCD MODULE（8）With controlled by sound and light module（9）；The power module（1）, external circuit module（2）, voltage sample module
（5）, IAP microcontrollers（6）It is sequentially connected, IC（3）, pin handover module（4）, external circuit module（2）It is sequentially connected, pin is cut
Change the mold block（4）, key-press module（7）, 1602 LCD MODULEs（8）With controlled by sound and light module（9）Simultaneously with IAP microcontrollers（6）
Connection；
The power module（1）Including transformer（10）, rectifier bridge（11）, capacitance C1, C2, LM7812 integrated stable voltage circuit
（12）；The 220V alternating currents pass sequentially through transformer（10）Decompression, rectifier bridge（11）After rectification, capacitance C1, C2 filtering with
LM7812 integrated stable voltage circuits（12）1 foot and 2 feet connection, LM7812 integrated stable voltage circuits（12）3 feet and 2 feet between output+
The voltage of 12V is as external circuit module（2）Power supply；
The external circuit module（2）Including capacitance C3, C4, C5, C6, Schottky diode IN5822, inductance L, resistance R1, R2；
The LM7812 integrated stable voltage circuits（12）3 feet and 2 feet between in parallel capacitance C3, C4 successively, Schottky diode IN5822
Cathode connect with one end of inductance L, the plus earth of Schottky diode IN5822；Between the other end and ground of inductance L successively
In parallel filter capacitor C5, C6, are connected in parallel on the both ends of capacitance C6, the both ends after resistance R1, R2 series connection are made after resistance R1, R2 series connection
For external circuit module（2）Output end Uo, one end of resistance R1 connect with the anode of output end Uo, one end of resistance R2 and output
Hold the cathode connection of Uo；
The pin handover module（4）Mono- 8 port number of simulant electronic switch I, CD4051 is controlled including mono- 8 channel number words of CD4051
Word controls mono- 8 channel number word of simulant electronic switch II, CD4051 and controls the mono- 8 channel number word control of simulant electronic switch III, CD4051
The mono- 8 channel number word control simulant electronic switch V of simulant electronic switch IV, CD4051 processed；The mono- 8 channel number word controls of CD4051
The ends COM of simulant electronic switch I, II, III, IV, V respectively with IC（3）Terminal 1,2,3,4,5 connect；CD4051 mono- 8 is logical
The vdd terminal of road digital control simulant electronic switch I, II, III, IV, V are connect after connecting simultaneously with+5V power supplys, and CD4051 mono- 8 is logical
The ends VEE, the ends VSS, the ends INH of road digital control simulant electronic switch I, II, III, IV, V are grounded after connecting simultaneously；CD4051 is mono-
It is connect with one end of capacitance C4 after the ends the Y0 connection of 8 channel number words control simulant electronic switch I, II, III, IV, V, capacitance C4's
The other end is grounded；It is grounded after the ends the Y1 connection of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051,
After the ends the Y2 connection of CD4051 mono- 8 channel number word control simulant electronic switches I, II, III, IV, V with two pole of IN5822 Schottky
The cathode of pipe connects, the ends Y3 of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051 connect after with resistance
The connecting pin of R1, R2 connect, and the ends Y4 of mono- 8 channel number word control simulant electronic switch I, II, III, IV, the V of CD4051 connect successively
It connects；A, B of the mono- 8 channel number word control simulant electronic switch I of CD4051, C-terminal respectively connected IAP microcontrollers（6）P2.5,
The end P2.4, P2.3 connects, and A, B of the mono- 8 channel number word control simulant electronic switch II of CD4051, C-terminal respectively connected IAP monolithics
Machine（6）The connection of the end P2.2, P2.1, P2.0, A, B of CD4051 mono- 8 channel number word control simulant electronic switches III, C-terminal are distinguished
It is connected to IAP microcontrollers（6）The connection of the end P4.5, P2.7, P2.6, mono- 8 channel number words of CD4051 control simulant electronic switch IV
A, B, C-terminal respectively connected IAP microcontrollers（6）The connection of the end P3.4, P3.3, P3.2, CD4051 mono- 8 channel number word control moulds
A, B of quasi- electronic switch V, C-terminal respectively connected IAP microcontrollers（6）The end P1.7, P1.6, P1.5 connection；
The voltage sample module（5）Including resistance R3, R4, R5, R6；It is connected in parallel on external circuit mould after resistance R3, R4 series connection
Block（2）The both ends of output end Uo, the connecting pin of resistance R3, R4 and IAP microcontrollers（6）The ends P1.2 connection, IAP microcontrollers（6）
The ends P1.0 connect with the connecting pin of resistance R1, R2；The mono- 8 channel number word control moulds of CD4051 are connected in parallel on after resistance R5, R6 series connection
The ends Y4 of quasi- electronic switch I, II, III, IV, V and the ends Y1, the connecting pin of resistance R5, R6 and IAP microcontrollers（6）The ends P1.1 connect
It connects.
2. the detection device of step-down switching type integrated voltage-stabilized chip according to claim 1, it is characterised in that：The button
Module（7）Including CH452 driving chips（13）, button KEY0, KEY1, KEY2, KEY3, KEY4, KEY5, KEY6, KEY7,
KEY8, KEY9, KEY10, KEY11, resistance R8, R9, R10, R11, R12, R13, R14, R15, R16, R17；The button KEY0,
Pass through resistance R15 and CH452 driving chip after one end connection of KEY1, KEY2, KEY3（13）The ends SEG0 connection, button
Pass through resistance R16 and CH452 driving chip after one end connection of KEY4, KEY5, KEY6, KEY7（13）The ends SEG1 connection, press
Pass through resistance R17 and CH452 driving chip after one end connection of key KEY8, KEY9, KEY10, KEY11（13）The ends SEG2 connect
It connects；Pass through resistance R14 and CH452 driving chip after the other end connection of button KEY0, KEY4, KEY8（13）The ends DIG3 connect
It connects, passes through resistance R13 and CH452 driving chip after the other end connection of button KEY1, KEY5, KEY9（13）The ends DIG2 connect
It connects, passes through resistance R12 and CH452 driving chip after the other end connection of button KEY2, KEY6, KEY10（13）The ends DIG1 connect
It connects, passes through resistance R11 and CH452 driving chip after the other end connection of button KEY3, KEY7, KEY11（13）The ends DIG0 connect
It connects, CH452 driving chips（13）The ends H3L2, the ends GND ground connection, CH452 driving chips（13）The ends ADRR, the ends VCC and+5V electricity
Source connects, CH452 driving chips（13）The ends INT, the ends SDA, the ends SCL pass through resistance R8, R9, R10 and IAP microcontroller respectively
（6）The ends P3.7, the ends P1.4, the ends P1.3 connection.
3. the detection device of step-down switching type integrated voltage-stabilized chip according to claim 1, it is characterised in that：Described 1602
Liquid crystal display（8）The ends D0, the ends D1, the ends D2, the ends D3, the ends D4, the ends D5, the ends D6, the ends D7, the ends RS, the ends RW, the ends E respectively with IAP
Microcontroller（6）The ends P0.0, the ends P0.1, the ends P0.2, the ends P0.3, the ends P0.4, the ends P0.5, the ends P0.6, the ends P0.7, the ends P4.4,
The ends P4.2, the connection of the ends P4.1；Between+5V power ends and ground by shunt capacitance C8, C9 successively filter after with 1602 liquid crystal displays
（8）Vdd terminal connected with the ends VSS, 1602 liquid crystal displays（8）Vdd terminal and the ends BLA with connect, the ends VSS connect with the ends BLK
It connects, 1602 liquid crystal displays（8）Vdd terminal, the ends VL, the ends VSS connect with 1 foot of potentiometer RW, 2 feet, 3 feet respectively.
4. the detection device of step-down switching type integrated voltage-stabilized chip according to claim 1, it is characterised in that：The acousto-optic
Control module（9）Including buzzer（14）, LED light, capacitance C7, resistance R7, triode T；Between+5V the power ends and ground
By after shunt capacitance C7 with IAP microcontrollers（6）The ends VCC connected with the ends GND, IAP microcontrollers（6）The ends P5.5 pass through resistance
R7 is connect with the base stage of the anode of LED light, triode T simultaneously, the minus earth of LED light, the emitter of triode T
Ground connection, the collector of triode T pass through buzzer（14）It is connect with+5V power ends.
5. the method for carrying out the detection of step-down switching type integrated voltage-stabilized chip using any one of claim 1-4 described devices, special
Sign is：The method of the detection is：Pass through key-press module（7）Input the core of step-down switching type integrated voltage-stabilized chip to be detected
Piece model gives IAP microcontrollers（6）, IAP microcontrollers（6）Export corresponding low and high level signal control pin handover module（4）
Switch pin so that IC（3）5 pins respectively with external circuit module（2）In the connection of corresponding port, chip to be detected exists
External circuit module（2）Cooperation under work, IAP microcontrollers（6）The letter of the voltage between each pin of chip to be detected is sampled by A/D
Number judge the quality of chip, and in 1602 liquid crystal displays（8）The working condition of upper display chip, and according to sound and light signal come
Prompt the quality of chip.
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