The A3946 is designed specifically for applications that require high power unidirectional dc motors, three-phase brushless dc motors, or other inductive loads. The A3946 provides two high-current gate drive outputs that are capable of driving a wide range of power N-channel MOSFETs.
The A3946 is a half-bridge power MOSFET controller designed for driving high-power unidirectional DC motors, three-phase brushless DC motors, and other inductive loads. It features two high-current gate drive outputs capable of driving a wide range of power N-channel MOSFETs, utilizing a bootstrap capacitor and an internal charge pump for high-side operation.
The A3946 is available in a 16-lead SOIC with copper batwing power tab (suffix LB) and a 16-lead TSSOP with exposed thermal pad (suffix LP).
Yes, the device includes a bootstrapped gate drive with a charge pump that allows for 100% duty cycle operation of the half-bridge.
A latched fault is triggered by undervoltage conditions on VREG or VREF, or when the junction temperature exceeds 170°C.