Overview
Description
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℃.
Features
- Equipped with AFE-mounted MCU, RX23E-A
- RX23E-A is capable of highly accurately measuring and controlling temperature with a single chip.
- It makes an external dedicated AFE unnecessary, thereby reducing the BOM cost and the board mounting area.
- Temperature and current measurement by ADC
- 24bitΔΣ ADC and excitation current source enables 3-wire Resistance Temperature Detector (RTD)'s measurement.
- Full-bridge circuit’s current measurement by 12bitSAR ADC
- PID Control Calculation by RXv2 Core
- Cascade control implementation of current control and temperature control improves both response and stability.
- PWM Control by Utilizing Peripheral Functions
- Complementary PWM output enables power-efficient control.
- Equipped with various power devices
- Half-bridge Driver ISL2111ABZ
- DC/DC converter ISL8560IRZ
- Power MOSFET RJK0654DPB
Components
- Application note
- Sample program
- Circuit diagram (included in application note)
Applications
Documentation
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Type | Title | Date |
Application Note | PDF 4.88 MB 日本語 | |
1 item
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Design & Development
Sample Code
Related Boards & Kits
Renesas Solution Starter Kit for RX23E-A
Using the evaluation board (RSSK RX23E-A) equipped with RX23E-A and peripheral circuits for sensor measurement, and software that can be downloaded from the web, you can start analog characteristic evaluation immediately after purchasing the kit. By using this kit, it is possible to shorten the...
Test this Board Remotely
Videos & Training
Renesas shows a Peltier cooler control demonstration using the high-performance, 32-bit RX23E-A Group microcontrollers.