TEC50V20AB

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Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@ana logti.com 1 Analog Technologies TEC50V20ACH High Voltage High Current TEC Controller Figure 1. Physical Photo of TEC50V20ACH

FEATURES

 Built-in Smart Auto PID Control – the World’s First  Power Supply Voltage: 50V  High Output Voltage: ±40V  High Output Current: 20A  High Efficiency: > 92% @VVPS = 50V & VTEC = 25V & ITEC = 20A  High Temperature Stability: < ±0.001°C  Low Thermistor Injection Current: < 1µA  Continuous Bi-directional Output  Programmable Output Current and Voltage Limits  Real Time Temperature, Current and Voltage Signals  Selectable Temperature Sensor Types: thermistor, RTD, or temperature sensor IC  High Reliability and Zero EMI  Compact Size: 63(L) × 61(W)× 16.7(H) (mm) 100 % Lead (Pb)-free and RoHS Compliant

APPLICATIONS

Driving high power TEC modules at high efficiency.

DESCRIPTION

TEC (Thermo-Electric Cooler) is a semiconductor device which can cool down or heat up the temperature of an object by injecting an electrical current in one or the other direction. This TEC controller, TEC50V20ACH, is designed to drive a TEC at high efficiency for regulating the object temperature precisely by controlling the direction and magnitude of the current going through the TEC. It is powered by a DC voltage between 10V to 50V and the output current can go up to 20A without using a heat sink. Figure 1 is the photo of the TEC controller TEC 50V20ACH, Pin 1 to pin 18 shows the signal pins, and the others are power pins. See Figure 2. The controller TEC50V20ACH allows setting the set- point temperature, maximum output voltage magnitude, and the maximum output current magnitude respectively. These three settings are the input parameters for the three control loops: constant temperature, constant curre nt, and constant voltage. Before hitting the maximum output voltage magnitude or the maximum output current magnitude, the temperature loop is in control. When hitting the maximum output voltage magnitude, either outputting a positive or negative value across the TEC, the voltage loop takes over the control, the controller will be outputting a constant voltage to the TEC; when hitting the maximum output current magnitude, the current loop takes over the control, the controller will be outputting a constant output current to the TEC. The highest output voltage magnitude is limited by the maximum power supply voltage, and the maximum output current magnitude is 20A. The temperature signal can be obtained by using one of these 3 temperature sens ors: thermistor, RTD or temperature sensor IC. When using a thermistor, the set-point temperature range is determined by an external temperature network formed by 3 resistors. In order to reduce the injection current to the thermistor to reduce the errors caused by the self-heating effect, the injection current is provided in pulse mode, reducing the current by 10 times as opposed to a continuous current. One advanced feature of this TEC controller is that it comes with a smart auto PID control micro-processor, it continuously senses and compensates for the thermal load automatically. No need to use any external components for forming a compensation network, nor requires tuning.* *Firmware PID control – currently not available. Conservative users can st ill select the conventional analog compensation network. The same as in the past, it requires a onetime pre-tuning network to match the

Table 1. Pin Function Descriptions

1 SNCO Digital output

interference between this TEC controller and the other SM device.

2 TMGD Digital output

3 SBDN Analog /Digital

by a 4.99MΩ resistor. If pulled to ground, it shuts down the entire controller. This pin has 2 threshold voltages: 1.5V and 2.0V. See Figure 5. SHUT DOWN: VSBDN < 0.3V, the controller is set to non-working state. except the output stages for TEC+ and TEC−. OPERATION: VSBDN＞ 2.0V, the whole controller is set to working state. the signal sources. It can also be used as analog output pin ground. temperature coefficient is <50ppm/°C max.

6 TMS Analog input

Analog Input port for setting the set-point temperature for the target object. temperature needs to be at 25°C, leave this pin unconnected.

7 IN+ Analog input Receive external temperature signal (thermistor and temperature sensor,

Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@ana logti.com 4 Analog Technologies TEC50V20ACH High Voltage High Current TEC Controller Pin # Name Note Description

8 RTH Analog input

Thermistor connection port. Connect to the thermistor which is mounted on the target object for sensing its temperature. By using the default internal temperature network, a 10kΩ @ 25°C thermistor can be used. Other type of thermistors or temperature sensors can also be used, see the application section for details.

9 TMO Analog output

Actual target object temperature indica tion. It swings from 0V to 4V. By using a default internal temperature ne twork, it represents 15°C to 35°C when this pin’s voltage swings 0.1V to 3.9V linearly, provided a standard 10kΩ thermistor is used as the temperature sensor device. 10 CMIN Analog input Compensation input pin for the thermal control loop.

11 IDR Analog input

This voltage is derived from the tem perature error detection circuit and used as the input control signal of the current loop for the TEC. Its internal impedance is 10k Ω and can be over-driven by an external analog signal which is able to over-ride the 10k Ω resistor. The voltage range is from 0V to 4V, corresponding to −20A to +20A output current. Setting this pin voltage to 2V forces the output current to zero.

12 ILM Analog input

This pin sets the TEC Current Limi t. The maximum limit current is 20A. Setting this pin’s voltage from 0V to 4V corresponds to setting the current magnitude limit from 0A to 20A: VILM = 3.75 (A)I MAXOUT

13 VLM Analog input

This pin sets the TEC voltage Limit. The maximum limit voltage is 50V. Setting this pin’s voltage from 0V to 4V corresponds to the TEC voltage magnitude limit being from 0 to 50V: VVLM = 7.5 VV MAXTECTEC −+ −

14 ITEC Analog output

TEC current indication. ITEC is an analog voltage output pin with a voltage proportional to the actual current through the TEC. ITEC’s center voltage is 2V, corresponding to zero current through the TEC. VITEC = 7.5 (A)IOUT +2V, where IOUT is the actual output current of the controller, flowing out from TEC+ port and flowing in to TEC− pin.

15 VTEC Analog output

TEC voltage indication. VTEC is an analog voltage output pin with a voltage proportional to the actual voltage across the TEC. It swings from 0V to 4V to indicate the output voltage being from −50V to 50V, so the center voltage is 2V. VVTEC = 15 VV TECTEC −+ − +2V

Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@ana logti.com 5 Analog Technologies TEC50V20ACH High Voltage High Current TEC Controller Pin # Name Note Description 16 CTMO Analog output The controller internal temperature indication output. It can be used for sensing the actual temperature of the controller, to avoid over-heating. 17 GND Ground Signal ground. Connect this pin to the signal ground of ADCs, DACs, and the signal sources. It can also be used as analog output pin ground.

18 RTH Analog input

Thermistor connection port. Connect to the thermistor which is mounted on the target object for sensing its temperature. By using the default internal temperature network, a 10kΩ @ 25°C thermistor can be used. Other type of thermistors or temperature sensors can also be used, see the application section for details.

19 TEC+ Analog power

This pin is used to connect to the front end of the TEC module to improve the current capability.

20 TEC− Analog power

output This pin is for connecting to the negative terminal of the TEC module. 21 PGND Power ground Power ground for connecting to the power supply 0V return node. 22 VPS Power input Power supply voltage positive node. The normal operating voltage range is 10V to 50V, the maximum value is 50V. S1 Dial the code switch Set the controller to different states and choose different types of temperature sensors to use. S4,S5, S6,S7, Dial the code switch Adjustment approach for resistors (Rd, Ri and Rp) and capacitors (Cd and Ci). See Table 4 for switch function details.

Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@ana logti.com 6 Analog Technologies TEC50V20ACH High Voltage High Current TEC Controller

ELECTRICAL CHARACTERISTICS

Parameter Symbol Conditions Min. Typ. Max. Units Reference Voltage V4VRSOUT T A = 25°C 4.0925 4.096 4.0995 V Initial Error VE T A = 25°C −0.05 0.05 % Temperature Coefficient TC ±3 ±8 ppm/°C Maximum Load Current I4VRMAX T A = 25°C −20 +20 mA Switch frequency F4VRS 83 85 87 Hz Output Voltage (Open circuit) V SNCOOUT Open circuit voltage = 0V ~ 4V PWM 0 4 V Voltage Range (with load) V SNCOOUT Open circuit voltage = 0V ~ 4V PWM 0.1 3.9 V Frequency F SNCO Open circuit voltage = 0V ~ 4V PWM 600 kHz Temperature Good Indication: TMGD pin, pin 1 Voltage Range (Open circuit) VTMGDOUT Open circuit voltage = 4V 0 4 V Voltage Range (with load) VTMGDOUT Open circuit voltage = 4V 0 4 V Maximum Sourcing Current ITMGDSC Open circuit voltage = 4V 1 15 mA Maximum Sourcing Voltage VTMGDSC Open circuit voltage = 4V 3.7 4 V Maximum Sinking Current I TMGDSK Open circuit voltage = 4V 3 20 mA Maximum Sinking Voltage V TMGDSK Open circuit voltage = 4V 0 0.6 V Standby Shutdown Control: SBDN pin, pin 3 Input Current I SBDNIN VSBDN = 0V 0.1 0.3 µA VSBDN = 4V 4 6 VSBDN = 50V 50 50 Input Voltage Range VSBDNIN Open circuit voltage = 5V 0 50 V Shutdown Logic Low VSBDNSDL Open circuit voltage = 5V 0 V Shutdown Logic High VSBDNSDH Open circuit voltage = 5V 0.7 V Standby Logic Low VSBDNSBL Open circuit voltage = 5V 1.4 V Standby Logic High VSBDNSBH Open circuit voltage = 5V 1.9 V Operation Logic Low VSBDNOPL Open circuit voltage = 5V 2.0 V Operation Logic High VSBDNOPH Open circuit voltage = 5V 5 V

Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@ana logti.com 7 Analog Technologies TEC50V20ACH High Voltage High Current TEC Controller Parameter Symbol Conditions Min. Typ. Max. Units Reference Voltage Output: 4VR pin, pin 5 Output Voltage Range V4VROUT T A = 25°C 4.0925 4.096 4.0995 V Initial Error VE T A = 25°C 0.05 % Temperature Coefficient TC T A = −40°C ~ 125°C 3 8 ppm/°C Maximum Load Current I4VRMAX T A = 25°C −20 +20 mA Maximum Load Capacitance C4VRMAX 0.1 1 uF Temperature Set: TMS pin, pin 6 Input Impedance (See Figure 3 in Page 8 for input equivalent circuit) Z TMSIN 5 M Ω Input Voltage Range VTMSIN 0 4 V Open Circuit Voltage VTMSOP 2 V Temperature Signal Input: IN+ pin, pin 7 Input Voltage Range VIN+ 0 4 V Thermistor Connection Port: RTH pin, pin 8, pin 18 Input Voltage Range VRTHIN 0 4 V Actual Target Object Temperature Indication: TMO pin, pin 9 Output Voltage Range V TMOOUT RLOAD = 10kΩ to 2V −40°C≤ TA≤ +125°C 0 4 V Output Current I TMOOUT VSS = 0V TA = 25°C −12 12 mA Compensation Input: CMIN pin, pin 10 Input Voltage Range V CMIN RLOAD = 10kΩ to 2V −40°C≤ TA≤ +125°C 0 4 V Input Current ICMIN −40°C≤ TA≤ +125°C 90 200 pA Compensation Output: IDR pin, pin 11 Output Voltage Range V IDROUT RLOAD = 10kΩ to 2V −40°C≤ TA≤ +125°C 0 4 V TEC Current Limit: ILM pin, pin 12 Input Impedance ZILM 21 kΩ Input Voltage Range VILMIN 0 4 V

Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@ana logti.com 8 Analog Technologies TEC50V20ACH High Voltage High Current TEC Controller Parameter Symbol Conditions Min. Typ. Max. Units TEC Voltage Limit: VLM pin, pin 13 Input Impedance (See Figure 4 in Page 8 for input equivalent circuit) Z VLM 10 k Ω Input Voltage Range VVLMIN 0 4 V TEC Current Indication: ITEC pin, pin 14 TEC Voltage Indication: VTEC pin, pin 15 Controller Temperature Indication: CTMO pin, pin 16 Output Voltage Range VCTMO T A = 25°C 0 4 V Maximum Load Current ICTMOOUT T A = 25°C −12 12 mA TEC+/TEC− pin, pin 19/pin 20 Maximum Output Current |IMAXTEC+| |IMAXTEC-| VPS = 50V TA = 25°C 0 20 A Maximum Output Voltage |V OUTMAX|V VPS = 50V 0 40 V Power Supply Input: VPS pin, pin 22 Input Voltage Range V VPS 5 50 V Input Current IVPS Operation mode 0.05 16 A IVPSSB Standby mode 5 20 mA IVPSSD Shutdown mode 50 µA Temperature Stability Temperature Error Voltage V TMO−VTMS −0.47 0.02 0.47 mV Efficiency η VVPS = 50V |VTEC+− VTEC−| = 14V |ITEC+− ITEC−| = 20A ≥92 % Case Operating Temperature Range TCS −40 110 °C Ambient Operating Temperature Range TA −40 65 °C Storage Temp. Range T STG −40 125 °C Controller Case Thermal Resistance RTH 9 °C /W

The block diagram of the controller is shown in Figure 6. Figure 6. TEC Controller Block Diagram

Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@ana logti.com 11 Analog Technologies TEC50V20ACH High Voltage High Current TEC Controller TEC controller connections are shown in Figure 7. W1 20k Clock wise From microprocessor To microprocessor 4V pules voltage reference 5V ~ 28V To power GND TEC 4VRS TMGD SBDN GND 4VR TMS IN+ RTH TMO CMIN IDR ILM VLM ITEC VTEC CTMO VPS VPS PGND PGND TEC− TEC− TEC+ TEC+ TEC+ TEC+ TEC− TEC− PGND PGND VPS VPS Voltage reference To external signal Thermistor W2 20k Clock wise 20k Clock wise Compensation network To ADC To ADC To ADC R1 R2 RI RP RD CI CD Figure 7. TEC Controller Connection

Figure 10. Linear Relationship between VTMO and

4 R 1 = 3 k Ω

IC temperature sensor has lower self-heating effect. Figure 11. IC temperature sensor Figure 12. Temperature sensor IC characteristics

Figure 30. TMO Pin Voltage vs. Set-point Temperature soldering pads as marked on the evaluation board. Control switch D1, D2, D3 in S1 to “Off”. the curve in the TEC controller data sheet. formula: VTEC (V) = 25 × VVTEC (V) – 50V. SBDN, the TEC controller is turned on.

without adding heat sink. The part number: TEC50V20ACH. Dimensions of this controller is shown in Figure 31. Figure 35. Dimensions of BLOCK Package

Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 1/29/2022 Email: staff@analogti.com/sales@a nalogti.com 23 Analog Technologies TEC50V20ACH High Voltage High Current TEC Controller NOTICE 1. ATI warrants performance of its produ cts for one year to the specifications applicable at the time of sale, except for those damaged by excessive abuse. Products found not meeting the specifications within one year from the date of sale can be exchanged free of charge. 2. ATI reserves the right to make changes to its product s or to discontinue any product or service without notice and advise customers to obtain the latest version of rele vant information to verify, before placing orders, that information being relied on is current and complete. 3. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringe ment, and limitation of liability. Testing and other quality control techniques are utilized to the extent ATI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. 4. Customers are responsible for their applications using ATI components. In order to minimize risks associated with the customers’ applications, adequate design and operating safeguards must be provided by the customers to minimize inherent or procedural hazards. ATI assu mes no liability for applications assistance or customer product design. 5. ATI does not warrant or represent that any license, either expressed or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of ATI covering or relating to any combination, machine, or process in which such products or servic es might be or are used. ATI’s publication of information regarding any third party’s products or services does not constitute ATI’s approval, warranty or endorsement thereof. 6. IP (Intellectual Property) Ownership: ATI retains t he ownership of full rights for special technologies and/or techniques embedded in its products, the designs for mech anics, optics, plus all modifications, improvements, and inventions made by ATI for its products and/or projects.