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REQ-P-03 — The overtemperature protection shall trip at 75 °C ±5 °C measured at the PCB hot-spot NTC. The recovery threshold shall be at least 10 °C below the trip threshold (i.e. ≤ 65 °C). Implemented via NTC + reference divider feeding the LM339 comparator. NTC placement pending PCB layout (RT-207).

draft · Performance

Statement

The overtemperature protection shall trip at 75 °C ±5 °C measured at the PCB hot-spot NTC. The recovery threshold shall be at least 10 °C below the trip threshold (i.e. ≤ 65 °C). Implemented via NTC + reference divider feeding the LM339 comparator. NTC placement pending PCB layout (RT-207).

Acceptance Criteria

Slow-ramp NTC temperature using a controlled heat source. Record: (1) trip temperature (output disables); (2) recovery temperature (latch can be cleared). Trip shall be 70–80 °C; recovery shall be ≤ trip − 10 °C.

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