G - Physics – 05 – F
Patent
G - Physics
05
F
328/186, 323/4
G05F 1/46 (2006.01) G05F 3/08 (2006.01) G05F 5/00 (2006.01) H01H 47/32 (2006.01) H03K 17/64 (2006.01)
Patent
CA 1179732
DRIVER CIRCUIT FOR USE WITH INDUCTIVE LOADS OR THE LIKE Abstract of the Disclosure An integrated circuit is operative to produce an output current to a load and for switching the output current when a predetermined peak magnitude of load current is reached to a lower predetermined constant value. The circuit includes an internal power stage rendered conductive for producing maximum load current through the external load which is connected in series therewith in response to an internally generated reference current. The power stage comprises a multi-emitter power transistor with each emitter coupled to a respective emitter ballast resistor such that the load current through one of the resistors may be sensed and compared to the reference current to cause the magnitude of this reference current to be switched from a maximum value to a minimum value when the sensed current is representative of te peak magnitude value of current to thereby reduce the load current until the magnitude thereof is representative of the lower level of reference current.
393684
Jarrett Robert B.
Lo Cascio James J.
Gowling Lafleur Henderson Llp
Semiconductor Components Industries L.l.c.
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