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REQ-F-07 — When the PCB hot-spot temperature exceeds the OT trip threshold, the OTL flip-flop shall latch, disabling the output and illuminating the OT red LED. The latch shall only be cleared (and the unit may then resume run) by a button press after the temperature has fallen below the hysteresis threshold. The unit shall not automatically restart.

draft · Functional

Statement

When the PCB hot-spot temperature exceeds the OT trip threshold, the OTL flip-flop shall latch, disabling the output and illuminating the OT red LED. The latch shall only be cleared (and the unit may then resume run) by a button press after the temperature has fallen below the hysteresis threshold. The unit shall not automatically restart.

Acceptance Criteria

Force OT condition (e.g. heat gun on NTC). Confirm: (1) output disables, OT LED lights; (2) unit does not restart automatically; (3) single button press after cool-down clears latch and allows restart. Edge case: first button press after OT in standby will toggle BTL — document in operating manual.

Sign-offs

No sign-offs recorded. Approving a requirement records one here.

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