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Patent Searching and Data


Title:
CONTROL CIRCUIT TO GENTLY TURN OFF POWER TRANSISTOR
Document Type and Number:
Japanese Patent JPH07184367
Kind Code:
A
Abstract:
PURPOSE: To provide a control circuit for slowing tuning off a semiconductor power transistor, especially for inductive loads. CONSTITUTION: This control circuit possesses means R1, R2, and 18 for limiting the load current flowing to the switch, and clocking and control circuits 11, 12, and 13, and guarantees to turn off a switch slowly with a specified delay, when it reaches the maximum load current value regardless of the duration of command pulses, whereby it keeps the power diffusion through the switch in load current limiting phase, moreover keeps the turn off overvoltage on or under a specified level.

Inventors:
SERUJIO PARAARA
SUTEFUAANO SERI
DONATO TARIIBIA
Application Number:
JP8430594A
Publication Date:
July 21, 1995
Filing Date:
April 22, 1994
Export Citation:
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Assignee:
CONS RIC MICROELETTRONICA
International Classes:
G05F1/56; H02M1/08; H03K17/00; H03K17/08; H03K17/16; H03K17/64; (IPC1-7): H02M1/08; G05F1/56; H03K17/00; H03K17/08; H03K17/16; H03K17/64
Attorney, Agent or Firm:
石田 敬 (外3名)