Patent ID: 6028470
Filing Date: 2000-02-22
Classification: H02H,H03K

Abstract:
An integrated circuit comprising:a base terminal;a power transistor having a base and a base current; anda circuit arrangement coupled to the power transistor and operating in a temperature-dependent fashion, the circuit arrangement including:a first pnp transistor having a base, a collector and an emitter, the first pnp transistor having an off-state current changing as a function of temperature and initiating a change in the base current of the power transistor,a temperature-dependent resistor coupled between the base and the emitter of the first pnp transistor, the temperature-dependent resistor having a positive temperature coefficient, anda second transistor having a collector and an emitter through which the base current of the power transistor flows, the collector of the second transistor being coupled to the base terminal of the integrated circuit and to the emitter of the first pnp transistor, the emitter of the second transistor being coupled to the base of the power transistor.