RX23E-A 32-bit MCU Realizes A Thermoelectric Peltier Controller Achieving A Control Resolution of about 5m°C
In recent years, the introduction of data driven predictive maintenance and automation has attracted attention, and the demand for acquiring various sensing data has also increased. In the field of temperature control, there is also increasing case where a single MCU device is being used to measure temperature at multiple points as well as other physical parameters.
As the specifications are increasing, the number of components used also increases. On the other hand, the demand for product miniaturization is also increasing, and reducing the board mounting area. In addition, the standardization of parts and platform development to meet such diversifying specifications has become a challenge.
To address these challenges, RENESAS has developed the RX23E-A, which integrates a high-precision 24-bit ΔΣ ADC and MCU that is ideal for temperature control into a single chip. By using the RX23E-A, the temperature control equipment that used a general purpose MCU and dedicated external ADC can now be replaced with a single MCU.
Renesas provides a reference design of the thermoelectric Peltier controller as an example of temperature controller. The main function in this reference design include the measurement, control and communication all by using RX23E-A as a single chip MCU.
System Configuration Diagram of RX23E-A Thermoelectric Peltier Controller
In this reference, cascade control is implemented by adding a current control loop to the temperature control loop. Cascade control is a control method used in applications that require precise control, and the RX23E-A come with lot of functions that is capable of realizing this implementation with a single chip.
We have developed the demo kit and confirmed that a control resolution of about 5 m ° C could be achieved. In addition, with proper tuning, high speed response with no overshoot can be realized.
5m℃ Step Response Waveform
Temperature Step Response
As shown in the table, this reference can be realized with a light arithmetic load, leaving room for adding other functions and implementing more advanced arithmetic processing. By using RX23E-A, it is possible to support various additional specifications.
Processing load of RX23E-A
*1 ICLK=32MHz
*2 The ratio to current control cycle 500us
This reference design can be used when considering implementation of a high precision sensing control in a single chip.
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本文由翊翊所思转载自Renesas，原文标题为:RX23E-A 32-bit MCU realizes a compact and highly precise Thermoelectric Peltier controller implementation.，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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可定制板装式压力传感器支持产品量程从5inch水柱到100 psi气压；数字输出压力传感器压力范围0.5~60inH2O，温度补偿范围-20~85ºС；模拟和数字低压传感器可以直接与微控制器通信，具备多种小型SIP和DIP封装可选择。
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