TEC14M5V3R5AS

Overview

The TEC14M5V3R5AS is a high-efficiency micro TEC controller designed for driving Thermo-Electric Coolers with high electrical and mechanical reliability. It achieves high temperature stability of 0.001°C through actual object temperature monitoring and internal T-R curve linearization. The module operates from a 5V power supply (VPS) and delivers a maximum output current of 3.5A with an efficiency of 90%. It features a fully molded, low-profile 18-PowerQFN package (14x14mm) with a bottom thermal pad for heat sinking. Key functions include programmable set-point temperature control via the TMS pin, current and voltage limiting, shutdown capability, and status indication.

Feature Summary

• High Efficiency: Achieves 90% efficiency in driving TECs.
• High Temperature Stability: Provides 0.001°C stability with actual object temperature monitoring.
• Compact Design: Fully molded, low-profile 18-SMT (14x14mm) package with bottom thermal pad.
• Programmable Control: Supports external setting of target temperature range, max TEC voltage, and compensation network.

Applications

• Driving Thermo-Electric Coolers (TECs) requiring precise temperature regulation.
• Applications needing high temperature stability such as laser diode cooling or sensor stabilization.
• Systems utilizing thermistors for temperature measurement and feedback loops.

Procurement Notes

Verify the component matches the specific Analog Technologies part number TEC14M5V3R5AS. Confirm the package type is 18-PowerQFN (14x14mm) and that it is lead-free and RoHS compliant. Ensure the application design accounts for the 5V power supply requirement and the need for an external compensation network consisting of three resistors and two capacitors.

Selection Notes

Select this controller when a compact, high-efficiency solution for TEC driving is required. It is suitable for applications where temperature stability of 0.001°C is critical. Note that the default set-point range is 15°C to 35°C using a standard 10k@25°C thermistor; custom ranges require contacting the manufacturer for internal network configuration. External components are needed for current/voltage limiting and loop compensation.

Part Context

This component belongs to the Micro TEC Controller series by Analog Technologies. It is categorized under Specialized ICs. The device integrates a high-stability low-noise 2.5V voltage reference which serves both the temperature setting network and measurement circuit to cancel errors. It includes protection features like shutdown input and temperature good indication.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Customizations such as different set-point ranges or thermistor types require direct consultation with Analog Technologies.

FAQ

How is the set-point temperature configured?

The set-point temperature is configured via the TMS pin (Pin 4). Using the default network, a voltage between 0.1V and 2.5V on this pin corresponds to a temperature range of 15°C to 35°C. It is recommended to use the controller's 2.5V reference for setting this voltage to ensure error cancellation.

What is the purpose of the compensation network?

The compensation network compensates for high-order thermal loads to stabilize the temperature control loop. It consists of five external components (three resistors and two capacitors) and is highly recommended to be implemented externally to allow modification for different thermal loads.

How does the device handle shutdown?

The SDNG pin (Pin 9) controls the shutdown function. Pulling this pin low shuts down the device. If left unconnected, the output voltage depends on whether the actual temperature is below or at the preset temperature.