AMT49413

AMT49413 3-Phase BLDC Controller and MOSFET Driver FEATURES AND BENEFITS ▪ High current 3-phase gate drive for N-channel MOSFETs ▪ Synchronous rectification ▪ Cross-conduction protection ▪ Charge pump and top-off charge pump for 100% PWM ▪ Integrated commutation decoder logic ▪ Operation over 5.5 to 50 V supply voltage range ▪ Extensive diagnostics output ▪ Provides +5 V Hall sensor power ▪ Low-current sleep mode PACKAGE: 48-Lead QFN with exposed thermal pad (suffix EV) Not to scale DESCRIPTION The AMT49413 is a 3-phase brushless DC (BLDC) motor controller for use with N-channel external power MOSFETs. It incorporates much of the circuitry required to design a costeffective three-phase motor drive system. TheAMT49413 provides functionality over a wide input supply range. A unique charge pump regulator provides adequate (>10 V) gate drive for battery voltages down to 7 V, and allows the device to operate with a reduced gate drive at battery voltages down to 5.5 V. Power dissipation in the charge pump is minimized by switching from a voltage doubling mode at low supply voltage to a dropout mode at the nominal running voltage of 14 V. A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs. An internal charge pump for the high-side drive allows for DC (100% duty cycle) operation. Internal fixed-frequency PWM current control circuitry can be used to regulate the maximum load current. The peak load current limit is set by the sele...