A 30a 3v Dmos Motor Controller and Driver

THIS REPORT WILL COVER the dmesign of a half-bridge actuator intended primarily for use as a power interface in multiplexed automobile systems as a windishild wiper motor drive; Figure 1. Power transistors with Rdsl(on) = 4 0 m a arc used. Maximum start-up current is 30A, operalion is from 6.5 t o 30V, maximum non-operating voltage is 5OV (load dump). Because of the very low value of Ron required, uppitr vertical power DMOS is integrated with all of the control circuitry and a discrete DMOS is used as the lower power element. Both the chips are mounted in a single package”, with two isolated die pads, with the bottom of each chip being connected t o the (drain of the respective power DMOS; Figure 2.