RX23E-A-TEC

This is a reference design of a thermoelectric Peltier controller using an high-precision AFE-mounted MCU, RX23E-A. It is capable of realizing measurement, calculation and the control necessary to perform temperature control with a single RX23E-A chip,

The Thermoelectric Peltier Controller (TEC) is a temperature controller for heating and cooling that utilizes a phenomenon called the Peltier effect. The TEC is widely used in consumer and industrial applications for temperature and has following features.

• Easy switching between heating and cooling depending on the direction of current
• High precision and fast response temperature control
• With no mechanical driving part, easy to miniaturize and generating no vibration or noise

This reference design consists of the application note describing a control design, hardware design and software design, and the sample program. By using this reference design, you can easily try temperature control using RX23E-A.

We have test-manufactured a demo unit and evaluated response characteristics and control resolution. The temperature response of the Peltier module with temperature control shortened the time to reach the final value of 63.2% from 24.9 sec to 3.18 sec compared to the response without temperature control, indicating a significant improvement in responsiveness. In addition, it is confirmed that the Peltier Controller can be controlled in a resolution of 5m℃ or less because it responds to changes in command values in steps of 5m℃.