The 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.
What is in this drawing
Read the decisions behind it.
01
Use LTC1923 as the dedicated TEC controller IC
02
Implement a full H-bridge with P-channel and N-channel MOSFETs
03
Rely on NTC thermistor voltage divider for temperature feedback
04
Include compensation components (capacitors and resistors) for control loop stability
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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