ELECTRONICS
Precision TEC Controller with LTC1923
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CASE ANALYSIS
Scenario
A medical cooler requires precise temperature control using a thermoelectric cooler (TEC). This LTC1923-based controller provides bidirectional current to the TEC via an H-bridge, with an NTC thermistor for feedback and compensation network for closed-loop stability.
Key decisions
- Use LTC1923 as the dedicated TEC controller IC
- Implement a full H-bridge with P-channel and N-channel MOSFETs
- Rely on NTC thermistor voltage divider for temperature feedback
- Include compensation components (capacitors and resistors) for control loop stability
When to reuse this
Suitable for precision temperature regulation of small thermal loads, such as medical sample coolers, laser diode cooling, or portable refrigeration, where bidirectional TEC control and high stability are required.
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