Semiconductor device which drives low-voltage driven switching d

Details Semiconductor device which drives low-voltage driven switching d Semiconductor device which drives low-voltage driven switching d

1997-09-03

1999-10-05

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327482, 323224, 323289, H03B 100

Patent

active

059630663

ABSTRACT:
A capacitor (C) and a Zener diode (ZD2) are connected in parallel to a high-voltage side drive circuit (2). when a Zener voltage (VZD2) is set 5V, a voltage which is charged up in the capacitor (C) is determined by the Zener voltage (VZD2). Hence, it is only necessarv to set a voltage (VCC) in a loxv-voltage d.c. power source (4) at a value which is higher than (VZD2+VD+VCE), where VD is a forward-direction voltage to a diode (Di) and VCE is an ON-voltage to a low-voltage side switching device (Q1). Since a variation in a charging voltage which is supplied to a high-voltage side drive circuit is suppressed, it is possible to drive a switching device with 5V.

REFERENCES:
patent: 5325258 (1994-06-01), Choi et al.
patent: 5412309 (1995-05-01), Ueunten
patent: 5796276 (1998-08-01), Phillips et al.
patent: 5818209 (1998-10-01), Masini et al.

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