Abstract: This application note first briefly discusses the basic operation theory of a thermoelectric cooler (TEC) and its application in
optical modules. Then it presents a digital approach to TEC control based on the DS4830 optical microcontroller. Mathematical analysis,
algorithm implementation, firmware flowcharts, coding tips, and an example code are included to make this article a step-by-step guide
for TEC control using the DS4830. Accuracy of ±0.1°C is readily achievable with TEC devices used in typical optical modules.
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