CN206726072U - A kind of TEC temperature-control circuits - Google Patents
A kind of TEC temperature-control circuits Download PDFInfo
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- CN206726072U CN206726072U CN201720238211.8U CN201720238211U CN206726072U CN 206726072 U CN206726072 U CN 206726072U CN 201720238211 U CN201720238211 U CN 201720238211U CN 206726072 U CN206726072 U CN 206726072U
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- channel mos
- mos pipe
- bridge driven
- tec
- driven chip
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Abstract
It the utility model is related to TEC temperature-control circuits, belong to temperature controlled technical field, it includes signal output unit U3 and temperature-control circuit, described temperature-control circuit is made up of two half-bridge driven chips, signal output unit U3 includes two signal output parts, two signal output parts are connected with two and half bridge chips respectively, the output end of two half-bridge driven chips is connected with TEC both positive and negative polarity respectively, a half-bridge driven chip sends signal to signal output unit U3 thereto, the permanent signal for being 0 is sent to another half-bridge driven chip, so that TEC negative or positive electrode is conductive, electric current flows to negative pole from TEC positive pole and realizes refrigeration, electric current flows to positive pole from negative pole and realizes heating.This circuit structure is simple, reliable operation, improves the flexibility ratio of this circuit.
Description
Technical field
The utility model belongs to temperature controlled technical field, specifically, is related to a kind of TEC temperature-control circuits.
Background technology
The temperature control system principal mode of present market has switch control and large-scale industrial temperature control module.Wherein utilize
Switch control temperature has simple and convenient, maneuverable feature, but is that temperature has fluctuation greatly there is also certain limitation,
The phenomenon in setting value can not be stablized.And large-scale industrial temperature control module precision is high, stability is good, but price, body
Product is huge suitable for application on the miniature devices such as laser.
Based on such situation, the development of temperature control system of semiconductor laser of a kind of low price, high stability has
Certain economic value and realistic meaning.Existing TEC temperature-control circuits, comparison voltage is typically generated using adjustable resistance,
So as to design temperature, and error amplifying circuit is formed using amplifier.One shortcoming of this circuit is to be inconvenient to change setting temperature
Degree；Second shortcoming be in the case of MCU being present in circuit, using amplifier add the complexity of circuit and hardware into
This.
Utility model content
The purpose of this utility model is that circuit passes through two in view of the above-mentioned problems, providing a kind of TEC temperature-control circuits
Individual half-bridge driven chip, which is realized, changes the purpose of sense of current and size in TEC, so that TEC heating or refrigeration, and
With control heating or the power of refrigeration.
For the attainment of one's purpose, technical scheme provided by the utility model is：
A kind of TEC temperature-control circuits that the utility model is related to, it is characterised in that：Described temperature-control circuit includes
Two half-bridge driven chip U1, U2, four N-channel MOS pipe Q1, Q2, Q3, Q4, two power inductance L1, L2, two bootstrapping electricity
Hold C1, C3, two filter capacitors C2, C4 and two diodes D1, D2, described half-bridge driven chip U1 VCC ends and SD ends
It is connected with external power supply, COM ends ground connection, the positive pole of VCC ends and SD ends also with diode D1 electrically connects, diode D1 negative pole
It is connected respectively with half-bridge driven chip U1 VB ends and bootstrap capacitor C1 one end, bootstrap capacitor the C1 other end and half-bridge
Driving chip U1 VS ends connection, half-bridge driven chip U1 high-end delivery outlet HO and low side delivery outlet LO respectively with N-channel MOS
Pipe Q1, Q2 grid electrical connection, N-channel MOS pipe Q1 drain electrode are connected with external power supply, the drain electrode of source electrode and N-channel MOS pipe Q2
Connection, N-channel MOS pipe Q2 source ground, half-bridge driven chip U1 VS ends also respectively source electrode, the N with N-channel MOS pipe Q1
One end connection of channel MOS tube Q2 grid and power inductance L1, power inductance the L1 other end and filter capacitor C2 are just
Pole and TEC positive pole electrically connect, filter capacitor C2 negative pole ground connection；Described half-bridge driven chip U2 VCC ends and SD ends is equal
It is connected with external power supply, COM ends ground connection, the positive pole of VCC ends and SD ends also with diode D2 electrically connects, diode D2 negative pole point
It is not connected with half-bridge driven chip U2 VB ends and bootstrap capacitor C3 one end, bootstrap capacitor the C3 other end and half-bridge drive
Dynamic chip U2 VS ends connection, half-bridge driven chip U2 high-end delivery outlet HO and low side delivery outlet LO respectively with N-channel MOS pipe
Q3, Q4 grid electrical connection, N-channel MOS pipe Q3 drain electrode are connected with external power supply, and the drain electrode of source electrode and N-channel MOS pipe Q4 connects
Connect, N-channel MOS pipe Q4 source ground, half-bridge driven chip U2 VS the ends also source electrode with N-channel MOS pipe Q3, N ditches respectively
One end connection of road metal-oxide-semiconductor Q4 grid and power inductance L2, the power inductance L2 other end and filter capacitor C4 positive pole
Electrically connected with TEC negative pole, filter capacitor C2 negative pole ground connection.
Preferably, described TEC temperature-control circuits also include signal output unit U3, described signal output unit U3
Including two output ports PWM1, PWM2, two output ports PWM1, PWM2 input with half-bridge driven chip U1, U2 respectively
End connection.
Using technical scheme provided by the utility model, compared with prior art, have the advantages that：
The TEC temperature-control circuits that the utility model is related to, circuit is realized by two half-bridge driven chips to be changed in TEC
The purpose of sense of current and size, so that TEC heating or refrigeration, and it is controlled the power of heating or refrigeration, this electricity
Line structure is simple, reliable operation, improves the flexibility ratio of this circuit.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model TEC temperature-control circuits.
Embodiment
To further appreciate that content of the present utility model, the utility model is described in detail in conjunction with the embodiments, it is real below
Apply example to be used to illustrate the utility model, but be not limited to the scope of the utility model.
With reference to shown in accompanying drawing 1, the TEC temperature-control circuits that the utility model is related to include signal output unit U3 and
Temperature-control circuit, described signal output unit U3 include two output ports PWM1, PWM2.Described temperature-control circuit
Including two half-bridge driven chip U1, U2, four N-channel MOS pipe Q1, Q2, Q3, Q4, two power inductance L1, L2, two from
Lift electric capacity C1, C3, two filter capacitors C2, C4 and two diodes D1, D2, described half-bridge driven chip U1 VCC ends and
SD ends are connected with external power supply, and COM ends ground connection, the positive pole of VCC ends and SD ends also with diode D1 electrically connects, diode D1's
Negative pole is connected with half-bridge driven chip U1 VB ends and bootstrap capacitor C1 one end respectively, the bootstrap capacitor C1 other end with
Half-bridge driven chip U1 VS ends connection, half-bridge driven chip U1 high-end delivery outlet HO and low side delivery outlet LO respectively with N ditches
Road metal-oxide-semiconductor Q1, Q2 grid electrical connection, N-channel MOS pipe Q1 drain electrode are connected with external power supply, source electrode and N-channel MOS pipe Q2
Drain electrode connection, N-channel MOS pipe Q2 source ground, half-bridge driven chip U1 VS ends are also respectively with N-channel MOS pipe Q1's
One end connection of source electrode, N-channel MOS pipe Q2 grid and power inductance L1, power inductance the L1 other end and filter capacitor
The positive pole electrical connection of C2 positive pole and TEC, filter capacitor C2 negative pole ground connection；Described half-bridge driven chip U2 VCC ends and
SD ends are connected with external power supply, and COM ends ground connection, the positive pole of VCC ends and SD ends also with diode D2 electrically connects, diode D2's
Negative pole is connected with half-bridge driven chip U2 VB ends and bootstrap capacitor C3 one end respectively, the bootstrap capacitor C3 other end with
Half-bridge driven chip U2 VS ends connection, half-bridge driven chip U2 high-end delivery outlet HO and low side delivery outlet LO respectively with N ditches
Road metal-oxide-semiconductor Q3, Q4 grid electrical connection, N-channel MOS pipe Q3 drain electrode are connected with external power supply, source electrode and N-channel MOS pipe Q4
Drain electrode connection, N-channel MOS pipe Q4 source ground, half-bridge driven chip U2 VS ends are also respectively with N-channel MOS pipe Q3's
One end connection of source electrode, N-channel MOS pipe Q4 grid and power inductance L2, power inductance the L2 other end and filter capacitor
The negative pole electrical connection of C4 positive pole and TEC, filter capacitor C2 negative pole ground connection.
As signal output unit U3 PWM1 ends output signal a, the signal that it is 0 that PWM2 outputs are permanent, PWM1 signals control U1
The Q1 of system is turned on dutycycle a, Q2 cut-offs, and so as to produce the positive pole that a*Vtec voltage is added in TEC, PWM2 permanent is 0 so that U2
Q3, Q4 cut-off of control, it is 0 so as to be added in the current potential of TEC negative poles, electric current flows to TEC negative poles, TEC refrigeration from TEC positive poles；Instead
Know, as signal output unit U3 PWM2 ends output signal a, the signal that it is 0 that PWM1 outputs are permanent, PWM2 signals make the Q3 that U2 is controlled
Turned on dutycycle a, Q4 cut-offs, so as to produce the negative pole that a*Vtec voltage is added in TEC, PWM1 permanent is 0 so that U1 controls
Q1, Q2 end, and are 0 so as to be added in the current potential of TEC positive poles, and electric current flows to TEC positive poles, TEC heatings from TEC negative poles.
Bootstrap capacitor C1 and diode D1 effect are：When just upper electric ,+12V power supplys give electric capacity C1 by diode D1
Charging, it is about 12V to make C1 both end voltages.When PWM1 is uprised, Q1 conductings, U1 VS terminal voltages rise, due to electric capacity C1 both ends electricity
Pressure keeps constant, and diode D1 has unilateral conduction, so U1 VB terminal voltages are also elevated, exists so as to U1 VB ends
PWM1 is higher about 12V than U1 VS ends all the time when being high, ensures that Q1 is constantly on when PWM1 is high.Filter capacitor C2, power electricity
Feel L1 and form LC filter circuits, reduce output DC voltage TEC+ ripple.
Bootstrap capacitor C3 and diode D2 effect are：When just upper electric ,+12V power supplys give electric capacity C3 by diode D2
Charging, it is about 12V to make C3 both end voltages.When PWM2 is uprised, Q3 conductings, U2 VS terminal voltages rise, due to electric capacity C3 both ends electricity
Pressure keeps constant, and diode D2 has unilateral conduction, so U2 VB terminal voltages are also elevated, exists so as to U2 VB ends
PWM2 is higher about 12V than U2 VS ends all the time when being high, ensures that Q3 is constantly on when PWM2 is high.Filter capacitor C4, power electricity
Feel L2 and form LC filter circuits, reduce output DC voltage TEC- ripple.
The utility model is described in detail above in association with embodiment, but the content be only it is of the present utility model compared with
Good embodiment, it is impossible to be considered as being used to limit practical range of the present utility model.It is all to be made according to present utility model application scope
Equivalent change and improvement etc., all should still fall within patent covering scope of the present utility model.
Claims (2)
- A kind of 1. TEC temperature-control circuits, it is characterised in that：Described temperature-control circuit includes two half-bridge driven chips U1, U2, four N-channel MOS pipe Q1, Q2, Q3, Q4, two power inductance L1, L2, two bootstrap capacitor C1, C3, two filtering Electric capacity C2, C4 and two diodes D1, D2,Described half-bridge driven chip U1 VCC ends and SD ends is connected with external power supply, and COM ends ground connection, VCC ends and SD ends are also Electrically connected with diode D1 positive pole, diode D1 negative pole respectively with half-bridge driven chip U1 VB ends and bootstrap capacitor C1 one end connection, the bootstrap capacitor C1 other end are connected with half-bridge driven chip U1 VS ends, half-bridge driven chip U1 height The grid of delivery outlet HO and low side delivery outlet LO respectively with N-channel MOS pipe Q1, Q2 is held to electrically connect, N-channel MOS pipe Q1 drain electrode It is connected with external power supply, source electrode is connected with N-channel MOS pipe Q2 drain electrode, N-channel MOS pipe Q2 source ground, half-bridge driven core Piece U1 VS ends also one end of the source electrode with N-channel MOS pipe Q1, N-channel MOS pipe Q2 grid and power inductance L1 respectively Connection, the power inductance L1 other end electrically connect with filter capacitor C2 positive pole and TEC positive pole, and filter capacitor C2 negative pole connects Ground；Described half-bridge driven chip U2 VCC ends and SD ends is connected with external power supply, and COM ends ground connection, VCC ends and SD ends are also Electrically connected with diode D2 positive pole, diode D2 negative pole respectively with half-bridge driven chip U2 VB ends and bootstrap capacitor C3 one end connection, the bootstrap capacitor C3 other end are connected with half-bridge driven chip U2 VS ends, half-bridge driven chip U2 height The grid of delivery outlet HO and low side delivery outlet LO respectively with N-channel MOS pipe Q3, Q4 is held to electrically connect, N-channel MOS pipe Q3 drain electrode It is connected with external power supply, source electrode is connected with N-channel MOS pipe Q4 drain electrode, N-channel MOS pipe Q4 source ground, half-bridge driven core Piece U2 VS ends also one end of the source electrode with N-channel MOS pipe Q3, N-channel MOS pipe Q4 grid and power inductance L2 respectively Connection, the power inductance L2 other end electrically connect with filter capacitor C4 positive pole and TEC negative pole, and filter capacitor C2 negative pole connects Ground.
- 2. TEC temperature-control circuits according to claim 1, it is characterised in that：It also includes signal output unit U3, institute The signal output unit U3 stated includes two output ports PWM1, PWM2, and two output ports PWM1, PWM2 drive with half-bridge respectively Dynamic chip U1, U2 input connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720238211.8U CN206726072U (en) | 2017-03-13 | 2017-03-13 | A kind of TEC temperature-control circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720238211.8U CN206726072U (en) | 2017-03-13 | 2017-03-13 | A kind of TEC temperature-control circuits |
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| Publication Number | Publication Date |
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| CN206726072U true CN206726072U (en) | 2017-12-08 |
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| CN201720238211.8U Active CN206726072U (en) | 2017-03-13 | 2017-03-13 | A kind of TEC temperature-control circuits |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108628365A (en) * | 2018-05-11 | 2018-10-09 | 深圳技术大学（筹） | TEC temperature control circuits |
| CN113992117A (en) * | 2021-11-01 | 2022-01-28 | 常州机电职业技术学院 | Motor control system for robot with temperature automatic compensation function |
-
2017
- 2017-03-13 CN CN201720238211.8U patent/CN206726072U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108628365A (en) * | 2018-05-11 | 2018-10-09 | 深圳技术大学（筹） | TEC temperature control circuits |
| CN113992117A (en) * | 2021-11-01 | 2022-01-28 | 常州机电职业技术学院 | Motor control system for robot with temperature automatic compensation function |
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