Patent EP0240807A1 successfully refreshed from Google Patents.
← Back to Patent Explorer
EP0240807A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Circuit arrangement for detecting an excess temperature in semiconductor power devices

Assignee: Siemens AG
•
Filing: 1987-03-20
•
Granted: —
•
Expires: 2007-03-20
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Translated from German Die Temperatur des Leistungs-Halbleiterbauelements wird von einem Bipolartransistor (T 1) erfaßt. Dem Bipolartransistor ist ein Depletion-MOSFET (T 2) in Reihe geschaltet, dessen Gateanschluß (G) und Sourceanschluß (S) miteinander verbunden sind. Der Drainanschluß ist mit einem Schwellwertglied (SW) verbunden. Der FET ist im Normalfall niederohmig, so daß am Eingang des Schwellwertglieds Sourcepotential, z. B. Massepotential, liegt. Mit temperaturbedingt steigendem Strom wird der Strom durch den FET (T 2) auf einen konstanten, im wesentlichen temperaturunabhängigen Wert begrenzt und das Potential am Eingang des Schwellwertglieds steigt steil an. Dies wird als Übertemperatursignal detektiert. The temperature of the power semiconductor component is detected by a bipolar transistor (T 1). A depletion MOSFET (T 2) is connected in series to the bipolar transistor, the gate connection (G) and source connection (S) of which are connected to one another. The drain connection is connected to a threshold value (SW). The FET is normally low-impedance, so that source potential, for. B. ground potential. As the current increases due to the temperature, the current through the FET (T 2) is limited to a constant, essentially temperature-independent value and the potential at the input of the threshold element rises steeply. This is detected as an overtemperature signal.

Inventors

  • 👤 Josef Dipl.-Ing. Einzinger
  • 👤 Christine Fellinger
  • 👤 Ludwig Dipl.-Ing. Leipold
  • 👤 Jenö Dr. Tihanyi
  • 👤 Roland Dipl.-Ing. Weber

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 08:17
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/01; G01K3/00; G01K3/005; Y; Y10; Y10S; Y10S323/00; Y10S323/907

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

US3809929A Cited
DE2519335B1 Cited
DE2933874A1 Cited
EP0117095A1 Cited
DE3415764A1 Cited
EP0160836A2 Cited
EP0217620A2 Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag