Overheating detection circuit for detecting overheating of a pow

Details Overheating detection circuit for detecting overheating of a pow Overheating detection circuit for detecting overheating of a pow

1993-11-24

1994-09-20

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

307310, 340598, 361103, 374152, 374178, 257467, G08B 1706

Patent

active

053493362

ABSTRACT:
An arrangement for detecting overheating of a power integrated circuit includes a power device integrated in a semiconductor substrate and an overheating detection circuit. The overheating detection circuit includes a reverse biased pn junction formed in the same semiconductor substrate as the power device and having a reverse leakage current flow which is temperature dependent, and a voltage convertor formed in the same semiconductor substrate as the power device and coupled to the pn junction for producing a voltage depending on the reverse leakage current flow. A threshold circuit is connected for receiving the voltage and producing a signal when the voltage exceeds a threshold voltage to indicate that the power device is overheated.

REFERENCES:
patent: 4667265 (1987-05-01), Stanojevic et al.
patent: 4730228 (1988-03-01), Einzinger et al.
patent: 4854731 (1989-08-01), Jenkins
patent: 4924212 (1990-05-01), Fruhauf et al.

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