CN202306375U

CN202306375U - Constant-current controller

Info

Publication number: CN202306375U
Application number: CN2011204163372U
Authority: CN
Inventors: 卢盛林
Original assignee: Dongguan OPT Machine Vision Tech Co Ltd
Current assignee: Guangdong OPT Machine Vision Co Ltd
Priority date: 2011-10-27
Filing date: 2011-10-27
Publication date: 2012-07-04
Anticipated expiration: 2021-10-27

Abstract

The utility model discloses a constant-current controller, which comprises an identifier sensor adapter circuit, a trigger input and trigger polarity selecting circuit, an output current strength adjusting circuit and a constant-current generating and outputting circuit, wherein the identifier sensor adapter circuit is used for identifying an identifier sensor, and transmitting an identification signal to the output current strength adjusting circuit; the output current strength adjusting circuit is used for determining a maximum output current value according to the identification signal; the output current strength adjusting circuit is used for determining a current output current value according to a maximum output current value and a current adjusting gear, and transmitting a current output current value signal to the constant current generating and outputting circuit; the constant current generating and outputting circuit is used for determining the current output current strength according to the current output current value signal; and output current magnitudes are matched by setting different identifying sensors. According to the constant-current controller, the output current magnitude can be adjusted conveniently, the maximum output load can be conveniently adjusted, and constant control over output current is realized.

Description

A kind of constant current mode controller

Technical field

The utility model relates to power supply control technology field, relates in particular to a kind of constant current mode controller.

Background technology

Light emitting diode (LED), electronic components such as resistance are when different temperatures, and its impedance is also different, if adopt constant voltage control, so, under different temperatures, because the variation of impedance, its electric current also can change.And the brightness of light emitting diode is directly proportional with electric current basically, if light emitting diode adopts the mode of constant voltage control, under different temperatures, the situation of the bigger drift of brightness can occur, and adopts the constant current type controller, can significantly reduce this phenomenon.

Existing a kind of LED constant-current controller; Comprise filtering circuit, current detection circuit and voltage stabilization and current stabilization circuit; Said filtering circuit comprises a single-phase bridge rectification wave filter, telefault, electrolytic capacitor C1 and magnetic sheet capacitor C2, and said electrolytic capacitor C1 and magnetic sheet capacitor C2 are connected in parallel on the said filtering circuit; Said current detection circuit is connected to form by resistance R 1, R2, R3 and R4, and said current detection circuit is connected with filtering circuit; The Vin end of said voltage stabilization and current stabilization circuit is connected with LED+, and the Mosc end of voltage stabilization and current stabilization circuit is connected LED-through R6, R3 with telefault.The output maximum current intensity of existing constant-current controller is unalterable, so adjustment output current size is convenient inadequately.

Summary of the invention

The utility model provides a kind of constant current mode controller that can conveniently adjust the output current size.

A kind of constant current mode controller comprises the mark sensor adapter circuit, triggers input and triggers polarity selecting circuit, output current intensity regulating circuit, steady current generation and output circuit; The input end of mark sensor adapter circuit is connected with mark sensor; The signal output part of mark sensor adapter circuit is connected with the signal input part of output current intensity regulating circuit; The signal output part of output current intensity regulating circuit produces with steady current and is connected with the current signal input end of output circuit; Trigger input and be connected with the triggering source with the signal input part that triggers polarity selecting circuit, the triggering input produces with steady current with the signal output part that triggers polarity selecting circuit and is connected with the trigger pip input end of output circuit;

Mark sensor adapter circuit identification marking sensor; And identification signal sent to the output current intensity regulating circuit; The output current intensity regulating circuit is confirmed the maximum output current value according to identification signal; The output current intensity regulating circuit is confirmed current output current value according to maximum output current value and current regulation stall; And current output current value signal being sent to steady current produces and output circuit, steady current produces with output circuit confirms current output current intensity according to this current output current value signal; The triggering input sends to steady current with trigger pip and produces and output circuit after receiving trigger pip with the triggering polarity selecting circuit, and the steady current generation is externally exported constant-current supply after receiving trigger pip with output circuit.

Wherein, the mark sensor adapter circuit comprises at least 1 adaptive electronic circuit; Adaptive electronic circuit comprises two voltage comparator U100B, three ends output adjustable voltage stabilizer U101, connector J100, resistance R 104, capacitor C 102; The model of U100B is LM393, and the model of U101 is LM317L, and 7 pin of U100B are connected with the Vcon1 end; 5 pin of U100B are connected with+2.5V power supply; 6 pin of U100B are connected with Rset1 end, the 2nd end of U100B, the end of R104, the end of C102, and the 1st end of U101 is connected with power supply VCC, and the 3rd end of U101 is connected with the other end of R104; 1 pin of the other end of C102, J100 is connected with ground, and 2 pin of J100 are connected with the Rset1 end;

Trigger input and comprise triggering level reference circuit and at least 1 triggering electronic circuit with the triggering polarity selecting circuit; The triggering level reference circuit comprises resistance R 1, three-terminal voltage-stabilizing diode U1, capacitor C 15; Trigger electronic circuit and comprise two voltage comparator U100A, single-pole double-throw switch (SPDT) JP100, resistance R 100, R101, R102, R103, capacitor C 100, C101, connector J3; The model of U100A is LM393; The model of U1 is TL431; 1 pin of J3 is connected with the Trig1 end, and the Trig1 end is connected with the end of R100, the end of R101, the end of C100, and the other end of R101 is connected with the moved end of JP100; JP100 the 1st not moved end and Trig1+ end be connected; JP100 the 2nd not moved end and Trig1-end is connected, the Trig1+ end is connected with the end of R102,3 pin of U100A, Trig1-holds and is connected with the end of R103,2 pin of U100A; 1 pin of U100A is connected with the Vcon1 end; The end of 1 pin of the other end of R102, the other end of R103, U1,3 pin of U1, C15, the end of R1 are connected with+2.5V power supply, and the other end of 8 pin of the other end of R100, U100A, the end of C101, R1 is connected with power supply VCC, and the other end of 2 pin of J3, the other end of C100, C101,4 pin of U100A, 2 pin of U1, the other end of C15 are connected with ground;

The output current intensity regulating circuit comprises that at least 1 is regulated electronic circuit; Regulate electronic circuit and comprise operational amplifier U102B, connector J101, adjustable resistance WR100, WR101, capacitor C 103; The model of U102B is TLC2262, and 1 pin of J101 is connected with the Rset1 end, and 2 pin of J101 are connected with the Iadj1 end; 3 pin of J101 are connected with the end of WR101, the sliding end of WR101; The other end of WR101 is connected with ground, and the Iadj1 end is connected with the end of C103,5 pin of U102B, and 6 pin of U102B are connected with the end of 7 pin of U102B, WR100; The sliding end of WR100 is connected with the A01 end, and the other end of the other end of WR101, the other end of WR100, C103 is connected with ground;

Steady current produces with output circuit and comprises at least 1 output electronic circuit; The output electronic circuit comprises operational amplifier U102A, FET Q100, resistance R 108, R109, R110, R111, capacitor C 104, C105, C107, connector J102; The model of U102A is TLC2262; The model of Q100 is IRL520, and 1 pin of J102 is connected with power vd D, and 2 pin of J102 are connected with the Iout1 end; 3 pin of U102A are connected with the A01 end; 2 pin of U102A are connected with the end of the end of C105, R108, the end of R110, the S end of Q100, and 1 pin of U102A is connected with the end of the other end of C105, R109, and the other end of R109 is connected with the end of R111, the G end of Q100; The D end of Q100 is connected with the Iout1 end; The other end of R111 is connected with the Vcon1 end, and the other end of 8 pin of U102A, the end of C104, R108, the positive pole of C107 are connected with power supply VCC, and 4 pin of the negative pole of C107, the other end of C104, U102A, the other end of R110 are connected with ground.

Wherein, also comprise the power distribution circuit that is used to provide power supply;

Power distribution circuit comprises three terminal regulator U4, direct current stabilizer U5, connector Jp1, J6, capacitor C 10, C11, C12, C13, C14, C16, C17, C18, diode D2, D4; The model of U4 is LM7805CT; The model of U5 is LM7812CT; 3 pin of U4 are connected with the positive pole of the end of power supply VCC, C10, C12,1 pin of Jp1; 1 pin of U4 is connected with the negative pole of 2 pin of Jp1, D2,1 pin of U5, the positive pole of C18, the end of C16, the negative pole of D4; 3 pin of U5 are connected with+12V power supply, the end of C11, the positive pole of C14, the positive pole of D2; The end of the positive pole of D4 and C17, the positive pole of C13, power vd D, 1 pin of J6,2 pin of J6 are connected, and the negative pole of 2 pin of the other end of 3 pin of J6,4 pin of J6, C10, the negative pole of C12, U4, the other end of C11, C14,2 pin of U5, the negative pole of C18, the other end of C16, the other end of C17, the negative pole of C13 are connected with ground.

Wherein, The mark sensor adapter circuit comprises 4 adaptive electronic circuits; Trigger input and comprise that with the triggering polarity selecting circuit 4 are triggered electronic circuits, the output current intensity regulating circuit comprises that 4 are regulated electronic circuit, and steady current produces with output circuit and comprises that 4 are exported electronic circuits; The 1st adaptive electronic circuit, the 1st triggering electronic circuit, the 1st adjusting electronic circuit, the 1st output electronic circuit constitute the 1st Current Control passage; The 2nd adaptive electronic circuit, the 2nd triggering electronic circuit, the 2nd adjusting electronic circuit, the 2nd output electronic circuit constitute the 2nd Current Control passage; The 3rd adaptive electronic circuit, the 3rd triggering electronic circuit, the 3rd adjusting electronic circuit, the 3rd output electronic circuit constitute the 3rd Current Control passage; The 4th adaptive electronic circuit, the 4th triggering electronic circuit, the 4th adjusting electronic circuit, the 4th output electronic circuit constitute the 4th Current Control passage.

Wherein, the mark sensor adapter circuit comprises sensor constant current feed circuit and at least 1 adaptive electronic circuit; Sensor constant current feed circuit comprise resistance R 3, capacitor C 23, C24, three-terminal voltage-stabilizing diode U8; Adaptive electronic circuit connector J100, triode Q100, two voltage comparator U101B, operational amplifier U1A, resistance R 100, R101, capacitor C 100, voltage stabilizing diode D100; The model of Q100 is S9015, and the model of U101B is LM393, and the model of U1A is MC34072; The end of the end of R3,2 pin of U8, C23, the negative pole of C24 are connected with the Vref end, and the other end of R3 is connected with ground, and 1 pin of J100 is connected with the negative pole of the collector of Q100, D100, the end of C100,3 pin of U1A; The collector of Q100 is connected with the Vref end; The emitter of Q100 is connected with the end of R100, and the positive pole of D100 is connected with the end of R101,6 pin of U101B, and 5 pin of U101B are connected with+2.5V power supply; 7 pin of U101B are connected with the Vcon1 end; 2 pin of U1A, 1 pin of U1A are connected with the Vref1 end, and the other end of 2 pin of J100, the other end of C100, R101,4 pin of U1A are connected with ground, and the positive pole of 3 pin of 8 pin of the other end of R100, U1A, 1 pin of U8, U8, the other end of C23, C24 is connected with power vd D;

Trigger input and comprise triggering level reference circuit and at least 1 triggering electronic circuit with the triggering polarity selecting circuit; The triggering level reference circuit comprises operational amplifier U3A, resistance R 4, R5, capacitor C 13, C14; Trigger electronic circuit and comprise three-terminal voltage-stabilizing diode U101A, resistance R 102, R103, R104, R105, single-pole double-throw switch (SPDT) JP100, capacitor C 101, diode D101, connector J3; 1 pin of connector J3 is connected with the Trig1 end; Trig1 end is connected with the end of C101, the end of R102, the end of R103, and the other end of R103 is connected with the moved end of JP100, JP100 the 1st not the moved end hold with Trig1+ and be connected; JP100 the 2nd not moved end and Trig1-end be connected; Trig1+ end is connected with the end of R104, the positive pole of D101,3 pin of U101A, and Trig1-holds and is connected with the end of R105,2 pin of U101A, and the other end of R104, the other end of R105 are connected with+2.5V power supply; 1 pin of U101A is connected with the Vcon1 end; The end of the end of the positive pole of C13, C14, the end of R4, R5 is connected with 3 pin of U3A, and 2 pin of U3A, 1 pin of U3A are connected with+2.5V power supply, and the other end of R4 is connected with power supply VCC; The other end of the other end of the negative pole of C13, the other end of C14, R5,4 pin of U3A, C101,4 pin of U101A are connected with ground, and 8 pin of 8 pin of U3A, the other end of R102, U101A are connected with power vd D;

The output current intensity regulating circuit comprises that at least 1 is regulated electronic circuit; Regulate electronic circuit and comprise digital to analog converter U102, adjustable resistance WR100, resistance R 106, capacitor C 102; The model of U102 is TLV56XX, and 1 pin of U102 is connected with the DataIn end, and 2 pin of U102 are connected with the Clk end; 3 pin of U102 are connected with the Cs1 end, and 6 pin of U102 are connected with RefIn1, and 7 pin of U102 are connected with RefOut1; The end of WR100 is connected with the Vref1 end; The sliding end of WR100 is connected with the end of R106, and the other end of R106 is connected with the end of RefIn1 end, C102, and the other end of C102, the other end of WR100 are connected with ground;

Steady current produces with output circuit and comprises negative pressure generation circuit and at least 1 output electronic circuit; Negative pressure generation circuit comprises reversal of poles power supply changeover device U6, capacitor C 9, C10, C12; The output electronic circuit comprises operational amplifier U100, triode Q101, resistance R 107, R108, R109, R110, R111, R112, R113, R114, R115, adjustable resistance WR101, capacitor C 103, C104, C105, C111, connector J102; The model of U100 is UA741, and the model of Q101 is TIP142, and the model of U6 is ICL7660; 2 pin of U6 are connected with the positive pole of C9, and 4 pin of U6 are connected with the negative pole of C9,5 pin of U6 and the negative pole of C10 ,-the 5V power supply is connected; 8 pin of U6 are connected with the positive pole of C12, power supply VCC, and the positive pole of C10, the negative pole of C12 are connected with ground, and the end of R109 is connected with the RefOut1 end; The other end of R109 is connected with Vcon1 end, 3 pin of U100, the end of R108, and 2 pin of U100 are connected with the end of the end of R110, R107, the end of C103, and 4 pin of U100 are connected with-5V power supply; 1 pin of U100 is connected with the end of WR101; 5 pin of U100 are connected with the other end of WR101, and the sliding end of WR101 is connected with-5V power supply, and 6 pin of U100 are connected with the base stage of Q101; 7 pin of U100, the collector of Q101 are connected with power vd D; The other end of R108 is connected with the end of R115, the end of R113, the end of R114, the end of R112, the positive pole of C111, the end of C104, and the other end of the other end of the other end of R115, the other end of R113, R114, the other end of R107, C103 is connected with the emitter of Q101, and the other end of R112 is connected with an end, the end of R111, the OutCheck1 end of C105; The negative pole of the other end of R110, the other end of R111, C111, the other end of C104 connect, and the other end of C105 is connected with ground.

Wherein, also comprise the arithmetic control circuit that is used to control constant-current supply output, be used for the adaptive communication interface with pc circuit of interface, be used for the user interface circuit of operation setting;

User interface circuit comprises that model is single-chip microcomputer U1, switch S 1, S2, the S3 of STC5402; The end of S1 is connected with 8 pin of U1, and the end of S2 is connected with 9 pin of U1, and the end of S3 is connected with 10 pin of U1, the other end ground connection of the other end of S1, the other end of S2, S3;

Arithmetic control circuit comprises single-chip microcomputer U2, crystal oscillator Y1, resistance R 1, capacitor C 1, C3, C4, diode D1; The model of U2 is STC12c2054AD; The end of Y1 is connected with the end of 4 pin of U2, C1; The other end of Y1 is connected with 5 pin of U2, the end of C3; The end of R1 is connected with 1 pin of the negative pole of D1, U2, the negative pole of C4, and the positive pole of C4 is connected with power supply VCC, and the other end of the other end of R1, the positive pole of D1, C1, the other end of C3 are connected with ground;

The communication interface with pc circuit comprises the chip U5 of compatible RS232 standard, connector J2, capacitor C 5, C6, C7, C8, C11, transition diode RV1, RV2; The model of U5 is MAX232, and the model of RV1 and RV2 is P4KE13CA, and 1 pin of J2 is connected with 14 pin of U5; 2 pin of J2 are connected with 13 pin of U5, and C5 is connected between 3 pin of 1 pin and U5 of U5, and C7 is connected between 5 pin of 4 pin and U5 of U5; C11 is connected between 16 pin of 15 pin and U5 of U5; 2 pin of U5 are connected with the end of C6, and 6 pin of U5 are connected with the end of C8, and the other end of C6, the other end of C8 are connected with ground.

Power distribution circuit comprises three terminal regulator U7, operational amplifier U3B, connector J4, J5, triode Q1, diode D4, D5, capacitor C 15, C16, C17, C18, C19, C20, adjustable resistance WR1; The model of U7 is LM7805CT; The model of U3B is MC34072; The model of Q1 is TIP142, and the 1 pin connection+24V power supply of U7,3 pin of U7 connect power supply VCC, C15 is anodal; The 2 pin connection+24V power supplys of 1 pin of J4, J4; The emitter of the end of the positive pole of C18, C19, the end of WR1, Q1, the positive pole of D4 are connected with+24V power supply, and the negative pole of D4 is connected with the collector of Q1, power vd D, and the base stage of Q1 is connected with the end of C20,7 pin of U3B; 6 pin of U3B are connected with the other end of C20, the sliding end of WR1; 5 pin of U3B are connected with+2.5V power supply, and 2 pin of the negative pole of the end of C16, the positive pole of C17, D5,1 pin of J5, J5,3 pin of J5 are connected with power vd D, and the other end of the negative pole of 6 pin of 4 pin of J5,5 pin of J5, J5, the other end of C16, C17, the positive pole of D5, WR1, the other end of C19, the negative pole of C18, the negative pole of C15 are connected with ground.

Wherein, The mark sensor adapter circuit comprises 2 adaptive electronic circuits; Trigger input and comprise that with the triggering polarity selecting circuit 2 are triggered electronic circuits, the output current intensity regulating circuit comprises that 2 are regulated electronic circuit, and steady current produces with output circuit and comprises that 2 are exported electronic circuits; The 1st adaptive electronic circuit, the 1st triggering electronic circuit, the 1st adjusting electronic circuit, the 1st output electronic circuit constitute the 1st Current Control passage; The 2nd adaptive electronic circuit, the 2nd triggering electronic circuit, the 2nd adjusting electronic circuit, the 2nd output electronic circuit constitute the 2nd Current Control passage.

The utility model beneficial effect: it comprises the mark sensor adapter circuit, triggers input and triggers polarity selecting circuit, output current intensity regulating circuit, steady current generation and output circuit.Mark sensor adapter circuit identification marking sensor; And identification signal sent to the output current intensity regulating circuit; The output current intensity regulating circuit is confirmed the maximum output current value according to identification signal; The output current intensity regulating circuit is confirmed current output current value according to maximum output current value and current regulation stall; And current output current value signal being sent to steady current produces and output circuit, steady current produces with output circuit confirms current output current intensity according to this current output current value signal; The triggering input sends to steady current with trigger pip and produces and output circuit after receiving trigger pip with the triggering polarity selecting circuit, and the steady current generation is externally exported constant-current supply after receiving trigger pip with output circuit.Trigger input and trigger closing and opening of polarity selecting circuit realization output.The instruction that instruction that current regulation stall can send according to regulator potentiometer, computing machine or user interface circuit send is confirmed.Through different mark sensors is set, the output current intensity regulating circuit can be confirmed different maximum output current values; Confirm current output current value according to maximum output current value and current regulation stall then; The utility model can conveniently be adjusted the output current size, realizes the constant control to output current, can conveniently adjust output maximum current intensity, thereby adjust maximum output load.

Description of drawings

Fig. 1 is the block diagram of the embodiment 1 of the utility model.

Fig. 2 is that the triggering input of the embodiment 1 of the utility model is selected circuit diagram with triggering polarity.

Fig. 3 is the mark sensor adapter circuit figure of the embodiment 1 of the utility model.

Fig. 4 is the output current intensity regulating circuit figure of the embodiment 1 of the utility model.

Fig. 5 is that the steady current of the embodiment 1 of the utility model produces and output circuit figure.

Fig. 6 is the power distribution circuit figure of the embodiment 1 of the utility model.

Fig. 7 is the block diagram of the embodiment 2 of the utility model.

Fig. 8 is the mark sensor adapter circuit figure of the embodiment 2 of the utility model.

Fig. 9 is that the triggering input of the embodiment 2 of the utility model is selected circuit diagram with triggering polarity.

Figure 10 is the output current intensity regulating circuit figure of the embodiment 2 of the utility model.

Figure 11 is that the steady current of the embodiment 2 of the utility model produces and output circuit figure.

Figure 12 is the power distribution circuit figure of the embodiment 2 of the utility model.

Figure 13 is the communication interface with pc circuit diagram of the embodiment 2 of the utility model.

Figure 14 is the arithmetic control circuit figure of the embodiment 2 of the utility model.

Figure 15 is the user interface circuit figure of the embodiment 2 of the utility model.

Embodiment

Embodiment 1.

Referring to Fig. 1 to Fig. 6, the utility model is carried out detailed description below in conjunction with accompanying drawing.

A kind of constant current mode controller of present embodiment comprises the mark sensor adapter circuit, triggers input and triggers polarity selecting circuit, output current intensity regulating circuit, steady current generation and output circuit; The input end of mark sensor adapter circuit is connected with mark sensor; The signal output part of mark sensor adapter circuit is connected with the signal input part of output current intensity regulating circuit; The signal output part of output current intensity regulating circuit produces with steady current and is connected with the current signal input end of output circuit; Trigger input and be connected with the triggering source with the signal input part that triggers polarity selecting circuit, the triggering input produces with steady current with the signal output part that triggers polarity selecting circuit and is connected with the trigger pip input end of output circuit;

The instruction that instruction that current regulation stall can send according to regulator potentiometer, computing machine or user interface circuit send is confirmed.Current regulation stall is adjusted the ratio that current output current value accounts for the maximum output current value; So just can confirm current output current value according to maximum output current value and current regulation stall.When using this constant current mode controller, possibly constant-current supply is provided, so output current intensity maybe be inequality for different external equipments at every turn; Can be through current regulation stall be set, thus confirm current output current intensity, so that output current meets the requirements,, represent that with " current " its parameter value can change here.

Wherein, the mark sensor adapter circuit comprises at least 1 adaptive electronic circuit; Adaptive electronic circuit comprises two voltage comparator U100B, three ends output adjustable voltage stabilizer U101, connector J100, resistance R 104, capacitor C 102; The model of U100B is LM393, and the model of U101 is LM317L, and 7 pin of U100B are connected with the Vcon1 end; 5 pin of U100B are connected with+2.5V power supply; 6 pin of U100B are connected with Rset1 end, the 2nd end of U100B, the end of R104, the end of C102, and the 1st end of U101 is connected with power supply VCC, and the 3rd end of U101 is connected with the other end of R104; 1 pin of the other end of C102, J100 is connected with ground, and 2 pin of J100 are connected with the Rset1 end.

Present embodiment has 4 Current Control passages, has 4 adaptive electronic circuits, and their structure is identical, and foregoing is only described the wherein structure of 1 adaptive electronic circuit; For ease of reading, the label of the said function components and parts of 4 Current Control passages changes according to certain rules, and the reader can combine accompanying drawing to understand rule change.

In the mark sensor adapter circuit: Rx04, Ux01, C102 form mark sensor constant current feed circuit, and Ux00B constitutes mark sensor access state identification circuit (then forbidding output when mark sensor does not insert).Referring to accompanying drawing, x=1,2,3,4.Mark sensor can be sign resistance.Through the different identification sensor is set, can adjust the output current size.

Trigger input and comprise triggering level reference circuit and at least 1 triggering electronic circuit with the triggering polarity selecting circuit; The triggering level reference circuit comprises resistance R 1, three-terminal voltage-stabilizing diode U1, capacitor C 15; Trigger electronic circuit and comprise two voltage comparator U100A, single-pole double-throw switch (SPDT) JP100, resistance R 100, R101, R102, R103, capacitor C 100, C101, connector J3; The model of U100A is LM393; The model of U1 is TL431; 1 pin of J3 is connected with the Trig1 end, and the Trig1 end is connected with the end of R100, the end of R101, the end of C100, and the other end of R101 is connected with the moved end of JP100; JP100 the 1st not moved end and Trig1+ end be connected; JP100 the 2nd not moved end and Trig1-end is connected, the Trig1+ end is connected with the end of R102,3 pin of U100A, Trig1-holds and is connected with the end of R103,2 pin of U100A; 1 pin of U100A is connected with the Vcon1 end; The end of 1 pin of the other end of R102, the other end of R103, U1,3 pin of U1, C15, the end of R1 are connected with+2.5V power supply, and the other end of 8 pin of the other end of R100, U100A, the end of C101, R1 is connected with power supply VCC, and the other end of 2 pin of J3, the other end of C100, C101,4 pin of U100A, 2 pin of U1, the other end of C15 are connected with ground.

Trigger input and trigger in the polarity selecting circuit: Rx00, Rx01, Cx00, Ux00A form trigger input circuit; Rx02, Rx03, JPx00 form the triggering polarity selecting circuit; R1, C15, U1 form the triggering level reference circuit.X=1，2，3，4。

The output current intensity regulating circuit comprises that at least 1 is regulated electronic circuit; Regulate electronic circuit and comprise operational amplifier U102B, connector J101, adjustable resistance WR100, WR101, capacitor C 103; The model of U102B is TLC2262, and 1 pin of J101 is connected with the Rset1 end, and 2 pin of J101 are connected with the Iadj1 end; 3 pin of J101 are connected with the end of WR101, the sliding end of WR101; The other end of WR101 is connected with ground, and the Iadj1 end is connected with the end of C103,5 pin of U102B, and 6 pin of U102B are connected with the end of 7 pin of U102B, WR100; The sliding end of WR100 is connected with the A01 end, and the other end of the other end of WR101, the other end of WR100, C103 is connected with ground.

In the output current intensity regulating circuit: the regulator potentiometer that inserts through the Jx01 interface plays the effect of Control current intensity, and WRx01 is as regulating the output current lower limit, and WRx00 is as regulating the output current upper limit, and Ux02B is bearing the enhancement function of conditioning signal.X=1，2，3，4。

In steady current generation and the output circuit: Rx08, Rx09, Rx10, Cx05, Ux02A, Qx00 form constant-current circuit, output current=V/Rs; Wherein voltage-to-ground, the Rs=Rx10 of V=Ux02A positive input terminal (the 3rd pin); Under the situation that Rs fixes,, just can obtain different current output value through changing different V values.X=1，2，3，4。

In the present embodiment, also comprise the power distribution circuit that is used to provide power supply.Certainly, can also comprise the AC-DC conversion module, power distribution circuit is connected with the AC-DC conversion module, and AC-DC conversion is a prior art, repeats no more here.

Power distribution circuit provides the voltage source that meets request for utilization to each module.U5, D2, C11, C14 are the 12V mu balanced circuits, and the cooling fan of system is given in power supply; C10, C12, U4 are the 5V mu balanced circuits, and the control section of system is given in power supply.

In the present embodiment; The mark sensor adapter circuit comprises 4 adaptive electronic circuits; Trigger input and comprise that with the triggering polarity selecting circuit 4 are triggered electronic circuits, the output current intensity regulating circuit comprises that 4 are regulated electronic circuit, and steady current produces with output circuit and comprises that 4 are exported electronic circuits; The 1st adaptive electronic circuit, the 1st triggering electronic circuit, the 1st adjusting electronic circuit, the 1st output electronic circuit constitute the 1st Current Control passage; The 2nd adaptive electronic circuit, the 2nd triggering electronic circuit, the 2nd adjusting electronic circuit, the 2nd output electronic circuit constitute the 2nd Current Control passage; The 3rd adaptive electronic circuit, the 3rd triggering electronic circuit, the 3rd adjusting electronic circuit, the 3rd output electronic circuit constitute the 3rd Current Control passage; The 4th adaptive electronic circuit, the 4th triggering electronic circuit, the 4th adjusting electronic circuit, the 4th output electronic circuit constitute the 4th Current Control passage.Certainly, the quantity of the Current Control passage of the utility model can also be quantity such as 2,6.

Present embodiment can be regulated the size of output current easily through the cooperating of mark sensor and regulator potentiometer; Mark sensor is confirmed maximum output current intensity, and regulator potentiometer is used to regulate current regulation stall.Such as, maximum output current intensity is 8A, and current regulation stall is 50%, and then the electric current of output is 4A.With respect to prior art, the utility model can change maximum output current value (maximum output current intensity) through the different identification sensor is set, and circuit kit only need insert the different identification sensor, can obtain different maximum output current intensity; And be prior art through the method that regulator potentiometer is provided with current regulation stall, do not giving unnecessary details here.

Wherein a kind of preferred parameter of the constant current mode controller of present embodiment is following:

Input voltage: DC26-28V, input current 12A (maximum).

Output voltage: DC24V (maximum and with load condition change), output current-single channel 0.01A-6A.

Controlled variable: insert sign resistance, resistance 1-6K Ω at Rset1 (Rset2) socket.Respective resistance values and output maximum current coupling (1K=1A, 2K=2A ... And minimum current=maximum current/256, can be divided into 256 gears with maximum current here ..6K=6A).Resistance exceeds above-mentioned scope, and output current value can occur controlling phenomenon.Do not insert sign resistance, controller does not have electric current output.

Other socket: Iout1 (Iout2)--output interface.TrigIn-triggering input.Trig1Sele (Trig2Sele)--trigger polarity and select.SourseIn-power supply input.Rs232-with the PC communication interface.

Communications protocol and " digital regulated Power supply belt IO mouth communications protocol " compatibility, but corresponding I partial failure.The panel method of application is identical with controllers such as DP1024V.

Embodiment 2.

Referring to Fig. 7 to Figure 15, the utility model is carried out detailed description below in conjunction with accompanying drawing.

Wherein, the mark sensor adapter circuit comprises sensor constant current feed circuit and at least 1 adaptive electronic circuit; Sensor constant current feed circuit comprise resistance R 3, capacitor C 23, C24, three-terminal voltage-stabilizing diode U8; Adaptive electronic circuit connector J100, triode Q100, two voltage comparator U101B, operational amplifier U1A, resistance R 100, R101, capacitor C 100, voltage stabilizing diode D100; The model of Q100 is S9015, and the model of U101B is LM393, and the model of U1A is MC34072; The end of the end of R3,2 pin of U8, C23, the negative pole of C24 are connected with the Vref end, and the other end of R3 is connected with ground, and 1 pin of J100 is connected with the negative pole of the collector of Q100, D100, the end of C100,3 pin of U1A; The collector of Q100 is connected with the Vref end; The emitter of Q100 is connected with the end of R100, and the positive pole of D100 is connected with the end of R101,6 pin of U101B, and 5 pin of U101B are connected with+2.5V power supply; 7 pin of U101B are connected with the Vcon1 end; 2 pin of U1A, 1 pin of U1A are connected with the Vref1 end, and the other end of 2 pin of J100, the other end of C100, R101,4 pin of U1A are connected with ground, and the positive pole of 3 pin of 8 pin of the other end of R100, U1A, 1 pin of U8, U8, the other end of C23, C24 is connected with power vd D.

Present embodiment has 2 Current Control passages, has 2 adaptive electronic circuits, and their structure is identical, and for ease of reading, the label of their said function components and parts changes according to certain rules, and the reader can combine accompanying drawing to understand rule change.

In the mark sensor adapter circuit: Rx00, Qx00, U8, C23, C24, R3 form mark sensor constant current feed circuit, and U1 amplifies as the input signal of mark sensor.Dx00, Rx01, Ux01B form mark sensor access state identification circuit (then forbidding output when mark sensor does not insert).See accompanying drawing, x=1,2.

Trigger input and comprise triggering level reference circuit and at least 1 triggering electronic circuit with the triggering polarity selecting circuit; The triggering level reference circuit comprises operational amplifier U3A, resistance R 4, R5, capacitor C 13, C14; Trigger electronic circuit and comprise three-terminal voltage-stabilizing diode U101A, resistance R 102, R103, R104, R105, single-pole double-throw switch (SPDT) JP100, capacitor C 101, diode D101, connector J3; 1 pin of connector J3 is connected with the Trig1 end; Trig1 end is connected with the end of C101, the end of R102, the end of R103, and the other end of R103 is connected with the moved end of JP100, JP100 the 1st not the moved end hold with Trig1+ and be connected; JP100 the 2nd not moved end and Trig1-end be connected; Trig1+ end is connected with the end of R104, the positive pole of D101,3 pin of U101A, and Trig1-holds and is connected with the end of R105,2 pin of U101A, and the other end of R104, the other end of R105 are connected with+2.5V power supply; 1 pin of U101A is connected with the Vcon1 end; The end of the end of the positive pole of C13, C14, the end of R4, R5 is connected with 3 pin of U3A, and 2 pin of U3A, 1 pin of U3A are connected with+2.5V power supply, and the other end of R4 is connected with power supply VCC; The other end of the other end of the negative pole of C13, the other end of C14, R5,4 pin of U3A, C101,4 pin of U101A are connected with ground, and 8 pin of 8 pin of U3A, the other end of R102, U101A are connected with power vd D.

Trigger input and trigger in the polarity selecting circuit: Rx02, Rx03, Cx01, Ux01A form trigger input circuit, and Rx04, Rx05, JPx00 composition trigger polarity selecting circuit, and Dx01 is as the switching control instruction that receives arithmetic control circuit; R4, R5, C13, C14, U3A form the triggering level reference circuit.X=1、2。

The output current intensity regulating circuit comprises that at least 1 is regulated electronic circuit; Regulate electronic circuit and comprise digital to analog converter U102, adjustable resistance WR100, resistance R 106, capacitor C 102; The model of U102 is TLV56XX, and 1 pin of U102 is connected with the DataIn end, and 2 pin of U102 are connected with the Clk end; 3 pin of U102 are connected with the Cs1 end, and 6 pin of U102 are connected with RefIn1, and 7 pin of U102 are connected with RefOut1; The end of WR100 is connected with the Vref1 end; The sliding end of WR100 is connected with the end of R106, and the other end of R106 is connected with the end of RefIn1 end, C102, and the other end of C102, the other end of WR100 are connected with ground; TLV56XX representes TLV56 series components and parts, such as TLV5636, TLV5639 etc.

In the output current intensity regulating circuit: Ux02 forms internal control strength of current regulating circuit, and WRx00, Rx06, Cx02 form mark sensor Control current dimmer circuit.X=1、2。

In steady current generation and the output circuit: Rx07, Rx08, Rx09, Rx10, Rx13, Rx14, Rx15, Cx03, Ux00, Qx01 form constant-current circuit; Output current=(* (Ra/ Rb) of V/Rs), wherein V=RefOutx voltage-to-ground, Rs=Rx13//Rx14//Rx15, Ra=Rx08, Rb=Rx09 of ordering.Under the situation that Ra, Rb, Rs fix,, just can obtain different current output value through changing different V values.U6, C9, C10, C12 form negative pressure generation circuit, to satisfy the need of work of Ux00.Rx11, Rx12 use as the duty that system detects this module.X=1、2。

Wherein, also comprise the arithmetic control circuit that is used to control constant-current supply output, be used for the adaptive communication interface with pc circuit of interface, be used for the user interface circuit of operation setting.

User interface circuit comprises that model is single-chip microcomputer U1, switch S 1, S2, the S3 of STC5402; The end of S1 is connected with 8 pin of U1, and the end of S2 is connected with 9 pin of U1, and the end of S3 is connected with 10 pin of U1, the other end ground connection of the other end of S1, the other end of S2, S3.

User interface circuit; Button S1, S2, S3, digital display tube SEG1, luminotron LED1, LED3 constitute user interface.U1 is the intelligent chip of Processing Interface affairs.The user can go the output of setting controller, the running status of removing monitor controller through SEG1, LED1, LED3 through button.

Arithmetic control circuit comprises single-chip microcomputer U2, crystal oscillator Y1, resistance R 1, capacitor C 1, C3, C4, diode D1; The model of U2 is STC12c2054AD; The end of Y1 is connected with the end of 4 pin of U2, C1; The other end of Y1 is connected with 5 pin of U2, the end of C3; The end of R1 is connected with 1 pin of the negative pole of D1, U2, the negative pole of C4, and the positive pole of C4 is connected with power supply VCC, and the other end of the other end of R1, the positive pole of D1, C1, the other end of C3 are connected with ground.

Arithmetic control circuit: R1, C1, D4 form the startup reset circuit of intelligent chip; C1, C3, Y1 provide the time reference frequency.Connector J1 is as being connected with user interface circuit.Intelligent chip U2 is the central processing unit of system.

Communication interface with pc circuit: C5, C6, C7, C8, U5, J2 are the communication interface adapter circuit.RV1, RV2 protection communicating circuit are avoided superpotential damage on the communication line.

Wherein, also comprise the power distribution circuit that is used to provide power supply; Power distribution circuit comprises three terminal regulator U7, operational amplifier U3B, connector J4, J5, triode Q1, diode D4, D5, capacitor C 15, C16, C17, C18, C19, C20, adjustable resistance WR1; The model of U7 is LM7805CT; The model of U3B is MC34072; The model of Q1 is TIP142, and the 1 pin connection+24V power supply of U7,3 pin of U7 connect power supply VCC, C15 is anodal; The 2 pin connection+24V power supplys of 1 pin of J4, J4; The emitter of the end of the positive pole of C18, C19, the end of WR1, Q1, the positive pole of D4 are connected with+24V power supply, and the negative pole of D4 is connected with the collector of Q1, power vd D, and the base stage of Q1 is connected with the end of C20,7 pin of U3B; 6 pin of U3B are connected with the other end of C20, the sliding end of WR1; 5 pin of U3B are connected with+2.5V power supply, and 2 pin of the negative pole of the end of C16, the positive pole of C17, D5,1 pin of J5, J5,3 pin of J5 are connected with power vd D, and the other end of the negative pole of 6 pin of 4 pin of J5,5 pin of J5, J5, the other end of C16, C17, the positive pole of D5, WR1, the other end of C19, the negative pole of C18, the negative pole of C15 are connected with ground.

Power distribution circuit: the voltage source that meets request for utilization is provided to each module.D4, Q1, U3B, C18, C19, C20, WR1 constitute the 24V mu balanced circuit, and the system cools fan is given in power supply.U7, C15 constitute the 5V mu balanced circuit, and power supply is to the systems control division branch.D5 plays the function that prevents to import reversal connection.

Wherein, The mark sensor adapter circuit comprises 2 adaptive electronic circuits; Trigger input and comprise that with the triggering polarity selecting circuit 2 are triggered electronic circuits, the output current intensity regulating circuit comprises that 2 are regulated electronic circuit, and steady current produces with output circuit and comprises that 2 are exported electronic circuits; The 1st adaptive electronic circuit, the 1st triggering electronic circuit, the 1st adjusting electronic circuit, the 1st output electronic circuit constitute the 1st Current Control passage; The 2nd adaptive electronic circuit, the 2nd triggering electronic circuit, the 2nd adjusting electronic circuit, the 2nd output electronic circuit constitute the 2nd Current Control passage.Certainly, the quantity of the Current Control passage of the utility model can also be quantity such as 2,6.

Present embodiment can be through the cooperating of mark sensor and computing machine, and perhaps cooperating of mark sensor and user interface circuit, perhaps cooperating of mark sensor and computing machine, user interface circuit, regulates the size of output current easily.Mark sensor is confirmed maximum output current intensity, and computing machine, user interface circuit are used to regulate current regulation stall, and calculation machine, user interface circuit can send the instruction of regulating current regulation stall.Current regulation stall is the number percent that current output accounts for maximum output current intensity.

Need to prove that the electronic devices and components parameter of this embodiment and Figure of description is only for reference, when present technique field those of ordinary skill was implemented the utility model in reality, the modification that need not creative work all belonged to the scope of the utility model protection.

Above content is merely the preferred embodiment of the utility model; For those of ordinary skill in the art; According to the thought of the utility model, the part that on embodiment and range of application, all can change, this description should not be construed as the restriction to the utility model.

Claims

1. a constant current mode controller is characterized in that: comprise the mark sensor adapter circuit, trigger input and trigger polarity selecting circuit, output current intensity regulating circuit, steady current generation and output circuit; The input end of mark sensor adapter circuit is connected with mark sensor; The signal output part of mark sensor adapter circuit is connected with the signal input part of output current intensity regulating circuit; The signal output part of output current intensity regulating circuit produces with steady current and is connected with the current signal input end of output circuit; Trigger input and be connected with the triggering source with the signal input part that triggers polarity selecting circuit, the triggering input produces with steady current with the signal output part that triggers polarity selecting circuit and is connected with the trigger pip input end of output circuit.

2. a kind of constant current mode controller according to claim 1 is characterized in that:

Said mark sensor adapter circuit comprises at least 1 adaptive electronic circuit; Adaptive electronic circuit comprises two voltage comparator U100B, three ends output adjustable voltage stabilizer U101, connector J100, resistance R 104, capacitor C 102; The model of U100B is LM393, and the model of U101 is LM317L, and 7 pin of U100B are connected with the Vcon1 end; 5 pin of U100B are connected with+2.5V power supply; 6 pin of U100B are connected with Rset1 end, the 2nd end of U100B, the end of R104, the end of C102, and the 1st end of U101 is connected with power supply VCC, and the 3rd end of U101 is connected with the other end of R104; 1 pin of the other end of C102, J100 is connected with ground, and 2 pin of J100 are connected with the Rset1 end;

Said triggering input comprises triggering level reference circuit and at least 1 triggering electronic circuit with the triggering polarity selecting circuit; The triggering level reference circuit comprises resistance R 1, three-terminal voltage-stabilizing diode U1, capacitor C 15; Trigger electronic circuit and comprise two voltage comparator U100A, single-pole double-throw switch (SPDT) JP100, resistance R 100, R101, R102, R103, capacitor C 100, C101, connector J3; The model of U100A is LM393; The model of U1 is TL431; 1 pin of J3 is connected with the Trig1 end, and the Trig1 end is connected with the end of R100, the end of R101, the end of C100, and the other end of R101 is connected with the moved end of JP100; JP100 the 1st not moved end and Trig1+ end be connected; JP100 the 2nd not moved end and Trig1-end is connected, the Trig1+ end is connected with the end of R102,3 pin of U100A, Trig1-holds and is connected with the end of R103,2 pin of U100A; 1 pin of U100A is connected with the Vcon1 end; The end of 1 pin of the other end of R102, the other end of R103, U1,3 pin of U1, C15, the end of R1 are connected with+2.5V power supply, and the other end of 8 pin of the other end of R100, U100A, the end of C101, R1 is connected with power supply VCC, and the other end of 2 pin of J3, the other end of C100, C101,4 pin of U100A, 2 pin of U1, the other end of C15 are connected with ground;

Said output current intensity regulating circuit comprises that at least 1 is regulated electronic circuit; Regulate electronic circuit and comprise operational amplifier U102B, connector J101, adjustable resistance WR100, WR101, capacitor C 103; The model of U102B is TLC2262, and 1 pin of J101 is connected with the Rset1 end, and 2 pin of J101 are connected with the Iadj1 end; 3 pin of J101 are connected with the end of WR101, the sliding end of WR101; The other end of WR101 is connected with ground, and the Iadj1 end is connected with the end of C103,5 pin of U102B, and 6 pin of U102B are connected with the end of 7 pin of U102B, WR100; The sliding end of WR100 is connected with the A01 end, and the other end of the other end of WR101, the other end of WR100, C103 is connected with ground;

Said steady current produces with output circuit and comprises at least 1 output electronic circuit; The output electronic circuit comprises operational amplifier U102A, FET Q100, resistance R 108, R109, R110, R111, capacitor C 104, C105, C107, connector J102; The model of U102A is TLC2262; The model of Q100 is IRL520, and 1 pin of J102 is connected with power vd D, and 2 pin of J102 are connected with the Iout1 end; 3 pin of U102A are connected with the A01 end; 2 pin of U102A are connected with the end of the end of C105, R108, the end of R110, the S end of Q100, and 1 pin of U102A is connected with the end of the other end of C105, R109, and the other end of R109 is connected with the end of R111, the G end of Q100; The D end of Q100 is connected with the Iout1 end; The other end of R111 is connected with the Vcon1 end, and the other end of 8 pin of U102A, the end of C104, R108, the positive pole of C107 are connected with power supply VCC, and 4 pin of the negative pole of C107, the other end of C104, U102A, the other end of R110 are connected with ground.

3. a kind of constant current mode controller according to claim 2 is characterized in that: also comprise the power distribution circuit that is used to provide power supply;

4. a kind of constant current mode controller according to claim 3; It is characterized in that: said mark sensor adapter circuit comprises 4 adaptive electronic circuits; Said triggering input comprises that with the triggering polarity selecting circuit 4 are triggered electronic circuits; Said output current intensity regulating circuit comprises that 4 are regulated electronic circuit, and said steady current produces with output circuit and comprises 4 output electronic circuits; The 1st adaptive electronic circuit, the 1st triggering electronic circuit, the 1st adjusting electronic circuit, the 1st output electronic circuit constitute the 1st Current Control passage; The 2nd adaptive electronic circuit, the 2nd triggering electronic circuit, the 2nd adjusting electronic circuit, the 2nd output electronic circuit constitute the 2nd Current Control passage; The 3rd adaptive electronic circuit, the 3rd triggering electronic circuit, the 3rd adjusting electronic circuit, the 3rd output electronic circuit constitute the 3rd Current Control passage; The 4th adaptive electronic circuit, the 4th triggering electronic circuit, the 4th adjusting electronic circuit, the 4th output electronic circuit constitute the 4th Current Control passage.

5. a kind of constant current mode controller according to claim 1 is characterized in that:

Said mark sensor adapter circuit comprises sensor constant current feed circuit and at least 1 adaptive electronic circuit; Sensor constant current feed circuit comprise resistance R 3, capacitor C 23, C24, three-terminal voltage-stabilizing diode U8; Adaptive electronic circuit connector J100, triode Q100, two voltage comparator U101B, operational amplifier U1A, resistance R 100, R101, capacitor C 100, voltage stabilizing diode D100; The model of Q100 is S9015, and the model of U101B is LM393, and the model of U1A is MC34072; The end of the end of R3,2 pin of U8, C23, the negative pole of C24 are connected with the Vref end, and the other end of R3 is connected with ground, and 1 pin of J100 is connected with the negative pole of the collector of Q100, D100, the end of C100,3 pin of U1A; The collector of Q100 is connected with the Vref end; The emitter of Q100 is connected with the end of R100, and the positive pole of D100 is connected with the end of R101,6 pin of U101B, and 5 pin of U101B are connected with+2.5V power supply; 7 pin of U101B are connected with the Vcon1 end; 2 pin of U1A, 1 pin of U1A are connected with the Vref1 end, and the other end of 2 pin of J100, the other end of C100, R101,4 pin of U1A are connected with ground, and the positive pole of 3 pin of 8 pin of the other end of R100, U1A, 1 pin of U8, U8, the other end of C23, C24 is connected with power vd D;

Said triggering input comprises triggering level reference circuit and at least 1 triggering electronic circuit with the triggering polarity selecting circuit; The triggering level reference circuit comprises operational amplifier U3A, resistance R 4, R5, capacitor C 13, C14; Trigger electronic circuit and comprise three-terminal voltage-stabilizing diode U101A, resistance R 102, R103, R104, R105, single-pole double-throw switch (SPDT) JP100, capacitor C 101, diode D101, connector J3; 1 pin of connector J3 is connected with the Trig1 end; Trig1 end is connected with the end of C101, the end of R102, the end of R103, and the other end of R103 is connected with the moved end of JP100, JP100 the 1st not the moved end hold with Trig1+ and be connected; JP100 the 2nd not moved end and Trig1-end be connected; Trig1+ end is connected with the end of R104, the positive pole of D101,3 pin of U101A, and Trig1-holds and is connected with the end of R105,2 pin of U101A, and the other end of R104, the other end of R105 are connected with+2.5V power supply; 1 pin of U101A is connected with the Vcon1 end; The end of the end of the positive pole of C13, C14, the end of R4, R5 is connected with 3 pin of U3A, and 2 pin of U3A, 1 pin of U3A are connected with+2.5V power supply, and the other end of R4 is connected with power supply VCC; The other end of the other end of the negative pole of C13, the other end of C14, R5,4 pin of U3A, C101,4 pin of U101A are connected with ground, and 8 pin of 8 pin of U3A, the other end of R102, U101A are connected with power vd D;

Said output current intensity regulating circuit comprises that at least 1 is regulated electronic circuit; Regulate electronic circuit and comprise digital to analog converter U102, adjustable resistance WR100, resistance R 106, capacitor C 102; The model of U102 is TLV56XX, and 1 pin of U102 is connected with the DataIn end, and 2 pin of U102 are connected with the Clk end; 3 pin of U102 are connected with the Cs1 end, and 6 pin of U102 are connected with RefIn1, and 7 pin of U102 are connected with RefOut1; The end of WR100 is connected with the Vref1 end; The sliding end of WR100 is connected with the end of R106, and the other end of R106 is connected with the end of RefIn1 end, C102, and the other end of C102, the other end of WR100 are connected with ground;

Said steady current produces with output circuit and comprises negative pressure generation circuit and at least 1 output electronic circuit; Negative pressure generation circuit comprises reversal of poles power supply changeover device U6, capacitor C 9, C10, C12; The output electronic circuit comprises operational amplifier U100, triode Q101, resistance R 107, R108, R109, R110, R111, R112, R113, R114, R115, adjustable resistance WR101, capacitor C 103, C104, C105, C111, connector J102; The model of U100 is UA741, and the model of Q101 is TIP142, and the model of U6 is ICL7660; 2 pin of U6 are connected with the positive pole of C9, and 4 pin of U6 are connected with the negative pole of C9,5 pin of U6 and the negative pole of C10 ,-the 5V power supply is connected; 8 pin of U6 are connected with the positive pole of C12, power supply VCC, and the positive pole of C10, the negative pole of C12 are connected with ground, and the end of R109 is connected with the RefOut1 end; The other end of R109 is connected with Vcon1 end, 3 pin of U100, the end of R108, and 2 pin of U100 are connected with the end of the end of R110, R107, the end of C103, and 4 pin of U100 are connected with-5V power supply; 1 pin of U100 is connected with the end of WR101; 5 pin of U100 are connected with the other end of WR101, and the sliding end of WR101 is connected with-5V power supply, and 6 pin of U100 are connected with the base stage of Q101; 7 pin of U100, the collector of Q101 are connected with power vd D; The other end of R108 is connected with the end of R115, the end of R113, the end of R114, the end of R112, the positive pole of C111, the end of C104, and the other end of the other end of the other end of R115, the other end of R113, R114, the other end of R107, C103 is connected with the emitter of Q101, and the other end of R112 is connected with an end, the end of R111, the OutCheck1 end of C105; The negative pole of the other end of R110, the other end of R111, C111, the other end of C104 connect, and the other end of C105 is connected with ground.

6. a kind of constant current mode controller according to claim 5 is characterized in that: also comprise the arithmetic control circuit that is used to control constant-current supply output, be used for the adaptive communication interface with pc circuit of interface, be used for the user interface circuit of operation setting;

7. a kind of constant current mode controller according to claim 6 is characterized in that: also comprise the power distribution circuit that is used to provide power supply;

8. a kind of constant current mode controller according to claim 7; It is characterized in that: said mark sensor adapter circuit comprises 2 adaptive electronic circuits; Said triggering input comprises that with the triggering polarity selecting circuit 2 are triggered electronic circuits; Said output current intensity regulating circuit comprises that 2 are regulated electronic circuit, and said steady current produces with output circuit and comprises 2 output electronic circuits; The 1st adaptive electronic circuit, the 1st triggering electronic circuit, the 1st adjusting electronic circuit, the 1st output electronic circuit constitute the 1st Current Control passage; The 2nd adaptive electronic circuit, the 2nd triggering electronic circuit, the 2nd adjusting electronic circuit, the 2nd output electronic circuit constitute the 2nd Current Control passage.