The A3940KLP and A3940KLW are designed specifically forautomotive applications that require high-power motors. Each providesfour high-current gate drive outputs capable of driving a wide range ofn-channel power MOSFETs in a full-bridge configuration.Bootstrap capacitors are utilized to provide the above-batterysupply voltage required for n-channel FETs. An internal charge pumpfor the high side allows for dc (100% duty cycle) operation of thebridge.Protection features include supply under/overvoltage, thermalshutdown, and motor lead short-to-battery and short-to-ground faultnotification, and a programmable dead-time adjustment for crossconductionprevention. The overvoltage trip point is user adjustable.The A3940 is supplied in a choice of two power packages, a 28-pinTSSOP with an exposed thermal pad (package type LP), and a 28-pinwide-body SOIC (package type LW). Both package types are availablein lead (Pb) free versions, with 100 % matte-tin leadframe plating(suffix –T).
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