One of the essential prerequisites for the largescale introduction of multiplex wiring systems for vehicles is the availability of high power ICs capable of driving lamps, motors, solenoids and relays. These ICs must be able to survive in an exceptionally hostile environment, they must be highly reliable and -- since so many are needed in each vehicle -- they must be inexpensive. Many power ICs suitable for this emerging market have already been introduced, but a gap was left at the high current end of the range, where ICs delivering 20A or more are needed to drive loads like windowlift motors.
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