A power driver having a power transistor (15) uses a disable unit (17) to disable the transistor (15) upon sensing a short circuit condition. No current sense resistors are used. The base-emitter voltage of the transistor (15) is compared by a comparator (14) with a reference signal provided by a reference...http://www.google.de/patents/US4698582?utm_source=gb-gplus-sharePatent US4698582 - Power driver having short circuit protection
