A3946 Datasheet | Allegro MicroSystems

FEATURES AND BENEFITS - On-chip charge pump for 7 V minimum input supply voltage - High-current gate drive for driving a wide range of N‑channel MOSFETs - Bootstrapped gate drive with top-off charge pump for 100% duty cycle - Overtemperature protection - Undervoltage protection - - 40°C to 135°C ambient operation PACKAGE: 16-pin TSSOP with exposed thermal pad (Suffix LP) DESCRIPTION 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 high-side gate driver switches an N-channel MOSFET that controls current to the load, while the low-side gate driver switches an N-channel MOSFET as a synchronous rectifier. A bootstrap capacitor provides the above-battery supply voltage required for N-channel MOSFETs. An internal top-off charge pump for the high side allows DC (100% duty cycle) operation of the half-bridge. The A3946 is available in a power package: a 16‑lead TSSOP with exposed thermal pad (suffix LP). It is lead (Pb) free, with 100% matte tin plated leadframe (suffix -T). Approximate footprint Typical Application VBAT ECU VBB ~FAULT BOOT GH IN1 IN2 RESET CP1 DT VREF CP2 VREG LGND PGND DS-A3946, Rev. 10 MCO-0001191 February 18, 2022 Half-Bridge Power MOSFET Controller SELECTION GUIDE Part Number Packing A3946KLPTR-T 4000 pieces/reel Package 16-pin TSSOP with exposed thermal pad ABSOLUTE MAXIMUM RATINGS Characteristic Symbol...