CN108196184A - A kind of XL series boost chip detection device and method - Google Patents
A kind of XL series boost chip detection device and method Download PDFInfo
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- CN108196184A CN108196184A CN201810070928.5A CN201810070928A CN108196184A CN 108196184 A CN108196184 A CN 108196184A CN 201810070928 A CN201810070928 A CN 201810070928A CN 108196184 A CN108196184 A CN 108196184A
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- 238000000034 method Methods 0.000 title claims abstract description 13
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- 238000012544 monitoring process Methods 0.000 abstract description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
Abstract
The present invention relates to a kind of XL series boost chip detection device and methods, belong to chip detection technique field.The present invention includes booster type constant current driver circuit for LED, booster type constant voltage circuit, two limit comparison circuit, square-wave generator and fault cues circuit；The booster type LED drive circuit, booster type constant voltage circuit difference output voltage signal give two limit comparison circuit, and two limit comparison circuit, square-wave generator are connected with fault cues circuit.The present invention carries out monitoring in real time to judge the failure of chip by the pin voltage to XL series boost chips, can quickly detect the failure of XL series boost chips.Meanwhile it is simple in structure, it is easy to operate, it is easy to use.
Description
Technical field
The present invention relates to a kind of XL series boost chip detection device and methods, belong to chip detection technique field.
Background technology
At present, most of XL series boost chip is divided into constant-pressure type and constant-current type two types, and each type of XL series
The boost chip of type has the two kinds of encapsulation of 8 feet and 5 feet again, and people generally make when the boost chip of XL series is used to encounter failure
Each pin voltage of chip is carried out to measure to judge the quality of the chip, this detection side one by one with the voltage gear of multimeter
Method takes time and effort, and due to the accident of wafer damage being caused often to occur voltmeter test pencil wrong when people detect.
Invention content
The technical problem to be solved by the present invention is to：The present invention provides a kind of XL series boost chip detection device and method,
When encountering failure for solving XL series boost chips, taken time and effort using multimeter detection and detection speed is easily damaged slowly
The problem of bad chip；Constant-current type and constant pressure cake core point are passed through booster type constant current driver circuit for LED, booster type by the present invention respectively
Constant voltage circuit is detected, and carries out monitoring in real time by the pin voltage to XL series boost chips to judge the event of chip
Barrier can quickly detect the failure of XL series boost chips.
The technical scheme is that：A kind of XL series boost chip detection device, including booster type constant current driver circuit for LED
1st, booster type constant voltage circuit 2, two limit comparison circuit 3, square-wave generator 4 and fault cues circuit 5；The booster type LED drivings
Circuit 1, booster type constant voltage circuit 2 distinguish output voltage signal to two limit comparison circuit 3, two limit comparison circuit 3, square-wave generator
4 are connected with fault cues circuit 5；
The two limit comparison circuit 3 includes integrated operational amplifier A1, A2, resistance R5, R6, R7, R8, diode D1, D2；It is described
+ 5V power supplys are connect by resistance R5 with the reverse side of integrated operational amplifier A1, and the reverse side of integrated operational amplifier A1 passes through
Resistance R6 is connect with the in-phase end of integrated operational amplifier A2, and the in-phase end of integrated operational amplifier A2 is grounded by resistance R7,
The reverse side of integrated operational amplifier A2 is connect after being connect with the in-phase end of integrated operational amplifier A1 with 8 foot IC seats 9；Integrated fortune
The output terminal for calculating amplifier A1, A2 respectively connected the anode of diode D1, D2, pass through after the cathode connection of diode D1, D2
Resistance R8 is connected to one end with door M of fault cues circuit 5；
The square-wave generator 4 includes integrated operational amplifier A3, A4, resistance R11, R12, R13, R14, R15, R16, R17, electricity
Hold C6, C7, diode D3, D4；The reverse side and in-phase end of the integrated operational amplifier A3 is connect respectively by resistance R14, R15
Ground, the both ends of resistance R15 it is in parallel capacitance C6, the in-phase end of integrated operational amplifier A3 pass sequentially through resistance R16, capacitance C7 with
Its output terminal connects, the reverse side of integrated operational amplifier A3 pass sequentially through after series resistance R11, R12, R13 with its output terminal
It connects, it is in parallel with resistance R13 again after diode D3, D4 reverse parallel connection；The output terminal of integrated operational amplifier A3 passes through resistance R17
It is connect with the reverse side of integrated operational amplifier A4, the in-phase end of integrated operational amplifier A4 is grounded by resistance R18, integrates fortune
The output terminal for calculating amplifier A4 is connected to one end with door M of fault cues circuit 5；
The fault cues circuit 5 includes buzzer and door M, resistance R9, R10, triode T；The output terminal with door M leads to
The base stage that resistance R9 is crossed with triode T is connect, the emitter of triode T ground connection, the collector of triode T by resistance R10 with
One end connection of buzzer, the other end of buzzer are connect with+5V power ends.
The booster type constant current driver circuit for LED 1 include 5 foot IC seats 6,8 foot IC seats 7, resistance R1, capacitance C1, C2, C3,
Inductance L1, Schottky diode V1, LED1 indicator light；After shunt capacitance C1, C2 filtering are passed sequentially through between+5V the power supplys and ground
It is connect respectively with 4 feet of 5 foot IC seats 6 and 1 foot；1 foot of 5 foot IC seats 6 is connect by resistance R1 with its 5 foot；The 1 of 5 foot IC seats 6
Foot, 2 feet, 3 feet, 4 feet, 5 feet are connect respectively with 7 feet of 8 foot IC seats 7 and 8 feet, 1 foot, 5 feet and 6 feet, 2 feet, 3 feet, 8 foot IC seats 7
5 feet and the connection of 6 feet after be connected to the anode of Schottky diode V1 and one end of inductance L1 simultaneously, the other end of inductance L1 with
The 2 feet connection of 8 foot IC seats 7, the cathode of Schottky diode V1 are connected to the anode of capacitance C3 and the sun of LED1 indicator lights simultaneously
Pole, the cathode ground connection of capacitance C3, the cathode of LED1 indicator lights are connect with 3 feet of 8 foot IC seats 7；
The booster type constant voltage circuit 2 includes 5 foot IC seats 8,8 foot IC seats 9, resistance R2, R3, capacitance C4, C5, inductance L2, Xiao Te
Based diode V2；4 feet of the 5 foot IC seats 8 are connect with 4 feet of 5 foot IC seats 6,1 foot of 5 foot IC seats 8 by resistance R2 and its 5
Foot connects；1 foot of 5 foot IC seats 8,2 feet, 3 feet, 4 feet, 5 feet respectively with 7 feet of 8 foot IC seats 9 and 8 feet, 1 foot, 5 feet and 6 feet, 2
It is grounded after foot, the connection of 3 feet, 7 feet of 8 foot IC seats 9 and the connection of 8 feet, Xiao is connected to simultaneously after 5 feet of 8 foot IC seats 9 and the connection of 6 feet
The anode of special based diode V2 and one end of inductance L2, the other end of inductance L2 are connect with 2 feet of 8 foot IC seats 9, two pole of Schottky
The cathode of pipe V2 is connect by resistance R3 with 3 feet of 8 foot IC seats 9, and the cathode of Schottky diode V2 is in parallel successively between ground
Capacitance C4, C5 are filtered；
1 foot of the 8 foot IC seats 7 and 1 foot of 8 foot IC seats 9 are connect by resistance R4 with the anode of LED2 indicator lights, LED2 instructions
The minus earth of lamp.
The method that the detection of XL series boost chip is carried out using described device, the method are as follows：
A, first judge that detected XL series boost chips belong to constant-pressure type or constant-current type boost chip；
B, if detected XL series boost chips belong to 5 foot boost chip of constant-current type, the chip according to correct pin
5 foot IC seats 6 being sequentially inserted into booster type constant current driver circuit for LED 1, if detected XL series boost chips belong to constant-current type
8 foot boost chips, then IC, the 8 foot chip being inserted into according to correct order of the pin in booster type constant current driver circuit for LED 1
7；If detected XL series boost chips belong to 5 foot boost chip of constant-pressure type, the chip according to correct order of the pin
5 foot IC seats 8 being inserted into booster type constant voltage circuit 2, if detected XL series boost chips belong to 8 foot of constant-pressure type boosting core
Piece, then 8 foot IC seats 9 chip being inserted into according to correct order of the pin in booster type constant voltage circuit 2；
C, power supply is opened, XL series boost chips device is started to work；
If the 5 foot IC seats 6 or 8 foot IC seats 7 D, in booster type constant current driver circuit for LED 1 access trouble-free booster type constant current core
Piece, then the LED1 indicator lights in booster type constant current driver circuit for LED 1 shine, 1 foot of 2 feet of 5 foot IC seats 6 or 8 foot IC seats 7 is defeated
Go out high level signal control LED2 indicator lights to shine；
If the 5 foot IC seats 8 or 8 foot IC seats 9 in booster type constant voltage circuit 2 access trouble-free booster type constant pressure chip, boost
2 feet of 5 foot IC seats 8 in type constant voltage circuit 2 or the 1 foot output high level signal control LED2 indicator lights of 8 foot IC seats 9 shine；
E, 5 foot IC seats 6 in booster type constant current driver circuit for LED 1 or 8 foot IC seats 7 access booster type constant current chip；
If the LED1 indicator lights in booster type constant current driver circuit for LED 1 do not shine, detected booster type constant current chip exists
Failure；If LED2 indicator lights do not shine, and buzzer sends out prompt tone, illustrates that the switch foot of the chip breaks down；
If LED2 indicator lights shine, buzzer sends out prompt tone, and the feedback foot for illustrating to be detected chip breaks down；
5 foot IC seats 8 or 8 foot IC seats 9 access booster type constant pressure chip in booster type constant voltage circuit 2, and LED2 indicator lights are not sent out
Light, and buzzer sends out prompt tone, illustrates that the switch foot of the chip breaks down；
If LED2 indicator lights shine, buzzer sends out prompt tone, and the feedback foot for illustrating to be detected chip breaks down；
F, detection finishes, and closes power supply, takes out and is detected chip.
The beneficial effects of the invention are as follows：The present invention provides a kind of XL series boost chip detection device and method, by right
The pin voltage of XL series boost chips carries out monitoring in real time to judge the failure of chip, can quickly detect the boosting of XL series
The failure of chip.Meanwhile it is simple in structure, it is easy to operate, it is easy to use.
Description of the drawings
Fig. 1 is circuit diagram of the present invention.
Each label in Fig. 1：1- booster types constant current driver circuit for LED, 2- booster types constant voltage circuit, 3- two limit comparisons circuit,
4- square-wave generators, 5- fault cues circuit, IC, 6-5 feet, IC, 7-8 feet, IC, 8-5 feet, IC, 9-8 feet, 10- buzzings
Device, V1~V2- Schottky diodes, R1~R18- resistance, D1~D4- diodes, M- and door, T- triodes, LED1~LED2-
Indicator light, A1~A4- integrated operational amplifiers, C1~C7- capacitances.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the invention will be further described.
Embodiment 1：As shown in Figure 1, a kind of XL series boost chip detection device, electricity is driven including booster type LED constant current
Road 1, booster type constant voltage circuit 2, two limit comparison circuit 3, square-wave generator 4 and fault cues circuit 5；The booster type LED drives
Dynamic circuit 1, booster type constant voltage circuit 2 distinguish output voltage signal to two limit comparison circuit 3, and two limit comparison circuit 3, square wave occur
Device 4 is connected with fault cues circuit 5；
The two limit comparison circuit 3 includes integrated operational amplifier A1, A2, resistance R5, R6, R7, R8, diode D1, D2；It is described
+ 5V power supplys are connect by resistance R5 with the reverse side of integrated operational amplifier A1, and the reverse side of integrated operational amplifier A1 passes through
Resistance R6 is connect with the in-phase end of integrated operational amplifier A2, and the in-phase end of integrated operational amplifier A2 is grounded by resistance R7,
The reverse side of integrated operational amplifier A2 is connect after being connect with the in-phase end of integrated operational amplifier A1 with 8 foot IC seats 9；Integrated fortune
The output terminal for calculating amplifier A1, A2 respectively connected the anode of diode D1, D2, pass through after the cathode connection of diode D1, D2
Resistance R8 is connected to one end with door M of fault cues circuit 5；
The square-wave generator 4 includes integrated operational amplifier A3, A4, resistance R11, R12, R13, R14, R15, R16, R17, electricity
Hold C6, C7, diode D3, D4；The reverse side and in-phase end of the integrated operational amplifier A3 is connect respectively by resistance R14, R15
Ground, the both ends of resistance R15 it is in parallel capacitance C6, the in-phase end of integrated operational amplifier A3 pass sequentially through resistance R16, capacitance C7 with
Its output terminal connects, the reverse side of integrated operational amplifier A3 pass sequentially through after series resistance R11, R12, R13 with its output terminal
It connects, it is in parallel with resistance R13 again after diode D3, D4 reverse parallel connection；The output terminal of integrated operational amplifier A3 passes through resistance R17
It is connect with the reverse side of integrated operational amplifier A4, the in-phase end of integrated operational amplifier A4 is grounded by resistance R18, integrates fortune
The output terminal for calculating amplifier A4 is connected to one end with door M of fault cues circuit 5；
The fault cues circuit 5 includes buzzer and door M, resistance R9, R10, triode T；The output terminal with door M leads to
The base stage that resistance R9 is crossed with triode T is connect, the emitter of triode T ground connection, the collector of triode T by resistance R10 with
One end connection of buzzer, the other end of buzzer are connect with+5V power ends.
Further, the booster type constant current driver circuit for LED 1 includes 5 foot IC seats 6,8 foot IC seats 7, resistance R1, capacitance
C1, C2, C3, inductance L1, Schottky diode V1, LED1 indicator light；Shunt capacitance is passed sequentially through between+5V the power supplys and ground
It is connect respectively with 4 feet of 5 foot IC seats 6 and 1 foot after C1, C2 filtering；1 foot of 5 foot IC seats 6 is connect by resistance R1 with its 5 foot；5
1 foot, 2 feet, 3 feet, 4 feet, 5 feet of foot IC seats 6 connect respectively with 7 feet of 8 foot IC seats 7 and 8 feet, 1 foot, 5 feet and 6 feet, 2 feet, 3 feet
It connects, the anode of Schottky diode V1 and one end of inductance L1, inductance is connected to simultaneously after 5 feet of 8 foot IC seats 7 and the connection of 6 feet
The other end of L1 is connect with 2 feet of 8 foot IC seats 7, the cathode of Schottky diode V1 be connected to simultaneously capacitance C3 anode and
The anode of LED1 indicator lights, the cathode ground connection of capacitance C3, the cathode of LED1 indicator lights are connect with 3 feet of 8 foot IC seats 7；
The booster type constant voltage circuit 2 includes 5 foot IC seats 8,8 foot IC seats 9, resistance R2, R3, capacitance C4, C5, inductance L2, Xiao Te
Based diode V2；4 feet of the 5 foot IC seats 8 are connect with 4 feet of 5 foot IC seats 6,1 foot of 5 foot IC seats 8 by resistance R2 and its 5
Foot connects；1 foot of 5 foot IC seats 8,2 feet, 3 feet, 4 feet, 5 feet respectively with 7 feet of 8 foot IC seats 9 and 8 feet, 1 foot, 5 feet and 6 feet, 2
It is grounded after foot, the connection of 3 feet, 7 feet of 8 foot IC seats 9 and the connection of 8 feet, Xiao is connected to simultaneously after 5 feet of 8 foot IC seats 9 and the connection of 6 feet
The anode of special based diode V2 and one end of inductance L2, the other end of inductance L2 are connect with 2 feet of 8 foot IC seats 9, two pole of Schottky
The cathode of pipe V2 is connect by resistance R3 with 3 feet of 8 foot IC seats 9, and the cathode of Schottky diode V2 is in parallel successively between ground
Capacitance C4, C5 are filtered；
1 foot of the 8 foot IC seats 7 and 1 foot of 8 foot IC seats 9 are connect by resistance R4 with the anode of LED2 indicator lights, LED2 instructions
The minus earth of lamp.
The method that the detection of XL series boost chip is carried out using described device, the method are as follows：
A, judge that detected XL series boost chips belong to constant-pressure type or constant-current type boost chip；
B, if detected XL series boost chips belong to 5 foot boost chip of constant-current type, the chip according to correct pin
5 foot IC seats 6 being sequentially inserted into booster type constant current driver circuit for LED 1, if detected XL series boost chips belong to constant-current type
8 foot boost chips, then IC, the 8 foot chip being inserted into according to correct order of the pin in booster type constant current driver circuit for LED 1
7；If detected XL series boost chips belong to 5 foot boost chip of constant-pressure type, the chip according to correct order of the pin
5 foot IC seats 8 being inserted into booster type constant voltage circuit 2, if detected XL series boost chips belong to 8 foot of constant-pressure type boosting core
Piece, then 8 foot IC seats 9 chip being inserted into according to correct order of the pin in booster type constant voltage circuit 2；
C, power supply is opened, XL series boost chips device is started to work；
If the 5 foot IC seats 6 or 8 foot IC seats 7 D, in booster type constant current driver circuit for LED 1 access trouble-free booster type constant current core
Piece, then the LED1 indicator lights in booster type constant current driver circuit for LED 1 shine, 1 foot of 2 feet of 5 foot IC seats 6 or 8 foot IC seats 7 is defeated
Go out high level signal control LED2 indicator lights to shine；3 feet of 5 feet of 5 foot IC seats 6 or 8 foot IC seats 7 export the voltage of 1.25V to
Two limit comparison circuit 3, two limit comparison circuit 3 export low level signal in fault cues circuit 5 with door M, meanwhile, square wave hair
Raw device 4 exports square-wave signal and gives a M, and low level signal is exported after operation with door M gives triode T, triode T to end,
Buzzer not sounding；
If the 5 foot IC seats 8 or 8 foot IC seats 9 in booster type constant voltage circuit 2 access trouble-free booster type constant pressure chip, boost
2 feet of 5 foot IC seats 8 in type constant voltage circuit 2 or the 1 foot output high level signal control LED2 indicator lights of 8 foot IC seats 9 shine；5
3 feet of 5 feet of foot IC seats 8 or 8 foot IC seats 9 export the voltage of 1.25V to two limit comparison circuit 3, and two limit comparison circuit 3 exports low
Level signal in fault cues circuit 5 with door M, meanwhile, square-wave generator 4 export square-wave signal give a M, with door M pass through
It crosses after operation and exports low level signal and give triode T, triode T cut-offs, buzzer not sounding；
E, 5 foot IC seats 6 in booster type constant current driver circuit for LED 1 or 8 foot IC seats 7 access booster type constant current chip, if booster type
LED1 indicator lights in constant current driver circuit for LED 1 do not shine, then there are failures for detected booster type constant current chip；If LED2
Indicator light does not shine, and buzzer sends out prompt tone, illustrates that the switch foot of the chip breaks down；At this point, 2 feet of 5 foot IC seats 6
Or 8 foot IC seats 71 foot output low level signal, the boost function of the chip is turned off, 5 feet of 5 foot IC seats 6 or 8 foot IC seats 7
3 feet export the voltage of 0V to two limit comparison circuit 3, two limit comparison circuit 3 exports high level signal in fault cues circuit 5
With door M, meanwhile, square-wave generator 4 export square-wave signal give a M, with door M exported after operation square-wave pulse signal to
Triode T, triode T are connected, and buzzer sends out prompt tone；If LED2 indicator lights shine, buzzer sends out prompt tone, illustrates quilt
The feedback foot of detection chip breaks down；At this point, 1 foot of 2 feet of 5 foot IC seats 6 or 8 foot IC seats 7 output high level signal core
The 3 feet output of the switch foot normal work of piece, 5 feet of 5 foot IC seats 6 or 8 foot IC seats 7 is not anti-in chip normal range of operation
Feedthrough voltage to two limit comparison circuit 3, two limit comparison circuit 3 export high level signal in fault cues circuit 5 with door M, together
When, square-wave generator 4 exports square-wave signal and gives a M, and square-wave pulse signal is exported after operation with door M gives triode T, and three
Pole pipe T is connected, and buzzer sends out prompt tone；
5 foot IC seats 8 or 8 foot IC seats 9 access booster type constant pressure chip in booster type constant voltage circuit 2, and LED2 indicator lights are not sent out
Light, and buzzer sends out prompt tone, illustrates that the switch foot of the chip breaks down；At this point, 2 feet of 5 foot IC seats 8 or 8 foot IC seats 9
1 foot output low level signal, the boost function of chip is turned off, and 3 feet of 5 feet of 5 foot IC seats 8 or 8 foot IC seats 9 export 0V's
Voltage to two limit comparison circuit 3, two limit comparison circuit 3 export high level signal in fault cues circuit 5 with door M, meanwhile,
Square-wave generator 4 exports square-wave signal and gives a M, and square-wave pulse signal is exported after operation with door M gives triode T, three poles
Pipe T is connected, and buzzer sends out prompt tone；If LED2 indicator lights shine, buzzer sends out prompt tone, illustrates to be detected the anti-of chip
Feed pin breaks down；At this point, the switch foot of 1 foot of 2 feet of the 5 foot IC seats 8 or 8 foot IC seats 9 output high level signal chip is just
The feedback voltage that 3 feet of often work, 5 feet of 5 foot IC seats 8 or 8 foot IC seats 9 export not in chip normal range of operation is limited to double
Comparison circuit 3, two limit comparison circuit 3 export high level signal in fault cues circuit 5 with door M, meanwhile, square-wave generator
4 output square-wave signals give a M, and square-wave pulse signal is exported after operation with door M gives triode T, triode T conductings, bee
Ring device sends out prompt tone；
F, detection finishes, and closes power supply, takes out and is detected chip.
Wherein, in electrical type chip, for IC, the serial number that each chip has pin provides, as long as by IC
Number installation can, the packaged types of 5 feet and 8 foot chips is all that the whole nation is unified.
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 under the premise of present inventive concept not be departed from
Various changes can be made.
Claims (3)
1. a kind of XL series boost chip detection device, it is characterised in that：Including booster type constant current driver circuit for LED（1）, boosting
Type constant voltage circuit（2）, two limit comparison circuit（3）, square-wave generator（4）With fault cues circuit（5）；The booster type LED drives
Dynamic circuit（1）, booster type constant voltage circuit（2）Output voltage signal gives two limit comparison circuit respectively（3）, two limit comparison circuit（3）、
Square-wave generator（4）With fault cues circuit（5）It is connected；
The two limit comparison circuit（3）Including integrated operational amplifier A1, A2, resistance R5, R6, R7, R8, diode D1, D2；Institute
It states+5V power supplys to connect with the reverse side of integrated operational amplifier A1 by resistance R5, the reverse side of integrated operational amplifier A1 leads to
The in-phase end that resistance R6 is crossed with integrated operational amplifier A2 is connect, and the in-phase end of integrated operational amplifier A2 is connect by resistance R7
Ground, the reverse side of integrated operational amplifier A2 connect with the in-phase end of integrated operational amplifier A1 after with IC, 8 foot（9）Connection；
The output terminal of integrated operational amplifier A1, A2 respectively connected the anode of diode D1, D2, the cathode connection of diode D1, D2
Fault cues circuit is connected to by resistance R8 afterwards（5）One end with door M；
The square-wave generator（4）Including integrated operational amplifier A3, A4, resistance R11, R12, R13, R14, R15, R16, R17,
Capacitance C6, C7, diode D3, D4；The reverse side and in-phase end of the integrated operational amplifier A3 passes through resistance R14, R15 respectively
Ground connection, the both ends of resistance R15 it is in parallel capacitance C6, the in-phase end of integrated operational amplifier A3 pass sequentially through resistance R16, capacitance C7
It is connect with its output terminal, the reverse side of integrated operational amplifier A3 exports after passing sequentially through series resistance R11, R12, R13 with it
End connects, in parallel with resistance R13 again after diode D3, D4 reverse parallel connection；The output terminal of integrated operational amplifier A3 passes through resistance
R17 is connect with the reverse side of integrated operational amplifier A4, and the in-phase end of integrated operational amplifier A4 is grounded by resistance R18, collection
Output terminal into operational amplifier A 4 is connected to fault cues circuit（5）One end with door M；
The fault cues circuit（5）Including buzzer and door M, resistance R9, R10, triode T；The output terminal with door M
It is connect by resistance R9 with the base stage of triode T, the emitter ground connection of triode T, the collector of triode T passes through resistance R10
It is connect with one end of buzzer, the other end of buzzer is connect with+5V power ends.
2. XL series boost chip detection device according to claim 1, it is characterised in that：The booster type LED constant current
Driving circuit（1）Including IC, 5 foot（6）, IC, 8 foot（7）, resistance R1, capacitance C1, C2, C3, inductance L1, Schottky diode
V1, LED1 indicator light；Passed sequentially through between+5V the power supplys and ground after shunt capacitance C1, C2 filtering respectively with IC, 5 foot（6）4
Foot and the connection of 1 foot；5 IC, feet（6）1 foot connect by resistance R1 with its 5 foot；5 IC, feet（6）1 foot, 2 feet, 3 feet, 4 feet,
5 feet respectively with IC, 8 foot（7）7 feet and 8 feet, 1 foot, 5 feet and 6 feet, 2 feet, 3 feet connection, 8 IC, feet（7）5 feet and 6 feet connect
It connects afterwards while is connected to the anode of Schottky diode V1 and one end of inductance L1, the other end of inductance L1 and IC, 8 feet（7）'s
2 feet connect, and the cathode of Schottky diode V1 is connected to the anode of capacitance C3 and the anode of LED1 indicator lights simultaneously, capacitance C3's
Cathode is grounded, the cathode of LED1 indicator lights and IC, 8 feet（7）3 feet connection；
The booster type constant voltage circuit（2）Including IC, 5 foot（8）, IC, 8 foot（9）, resistance R2, R3, capacitance C4, C5, inductance
L2, Schottky diode V2；IC, 5 foot（8）4 feet and IC, 5 feet（6）4 feet connection, 5 IC, feet（8）1 foot lead to
Resistance R2 is crossed to connect with its 5 foot；5 IC, feet（8）1 foot, 2 feet, 3 feet, 4 feet, 5 feet respectively with IC, 8 foot（9）7 feet and 8
Foot, 1 foot, 5 feet and 6 feet, 2 feet, the connection of 3 feet, 8 IC, feet（9）7 feet and 8 feet connection after be grounded, 8 IC, feet（9）5 feet and 6
The anode of Schottky diode V2 and one end of inductance L2, the other end of inductance L2 and IC, 8 feet are connected to after foot connection simultaneously
（9）The connection of 2 feet, the cathode of Schottky diode V2 passes through resistance R3 and IC, 8 feet（9）3 feet connection, Schottky diode
The cathode of V2 in parallel capacitance C4, C5 are filtered successively between ground；
IC, 8 foot（7）1 foot and IC, 8 feet（9）1 foot connect by resistance R4 with the anode of LED2 indicator lights, LED2
The minus earth of indicator light.
3. the method for XL series boost chip detection is carried out using any one of claim 1-2 described devices, it is characterised in that：Institute
The method of stating is as follows：
A, first judge that detected XL series boost chips belong to constant-pressure type or constant-current type boost chip；
B, if detected XL series boost chips belong to 5 foot boost chip of constant-current type, the chip according to correct pin
It is sequentially inserted into booster type constant current driver circuit for LED（1）In IC, 5 foot（6）If detected XL series boost chips belong to permanent
The chip is then inserted into booster type constant current driver circuit for LED by 8 foot boost chip of flow pattern according to correct order of the pin（1）In 8
IC, foot（7）；If detected XL series boost chips belong to 5 foot boost chip of constant-pressure type, the chip according to correct
Order of the pin is inserted into booster type constant voltage circuit（2）In IC, 5 foot（8）If detected XL series boost chips belong to constant pressure
The chip is then inserted into booster type constant voltage circuit by 8 foot boost chip of type according to correct order of the pin（2）In IC, 8 foot
（9）；
C, power supply is opened, XL series boost chips device is started to work；
If D, booster type constant current driver circuit for LED（1）In IC, 5 foot（6）Or IC, 8 foot（7）Access trouble-free booster type
Constant current chip, then booster type constant current driver circuit for LED（1）In LED1 indicator lights shine, 5 IC, feet（6）2 feet or 8 foot IC
Seat（7）1 foot output high level signal control LED2 indicator lights shine；
If booster type constant voltage circuit（2）In IC, 5 foot（8）Or IC, 8 foot（9）Trouble-free booster type constant pressure chip is accessed,
Then booster type constant voltage circuit（2）In IC, 5 foot（8）2 feet or IC, 8 feet（9）1 foot output high level signal control LED2
Indicator light shines；
E, booster type constant current driver circuit for LED（1）In IC, 5 foot（6）Or IC, 8 foot（7）Access booster type constant current chip；
If booster type constant current driver circuit for LED（1）In LED1 indicator lights do not shine, then detected booster type constant current chip is deposited
In failure；If LED2 indicator lights do not shine, and buzzer sends out prompt tone, illustrates that the switch foot of the chip breaks down；
If LED2 indicator lights shine, buzzer sends out prompt tone, and the feedback foot for illustrating to be detected chip breaks down；
Booster type constant voltage circuit（2）In IC, 5 foot（8）Or IC, 8 foot（9）Booster type constant pressure chip is accessed, and LED2 is indicated
Lamp does not shine, and buzzer sends out prompt tone, illustrates that the switch foot of the chip breaks down；
If LED2 indicator lights shine, buzzer sends out prompt tone, and the feedback foot for illustrating to be detected chip breaks down；
F, detection finishes, and closes power supply, takes out and is detected chip.
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