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. The AMT49413 is designed to operate across a wide voltage range, including automotive applications up to 50V. 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. Thanks to the internal commutation control (Hall sensor inputs), PWM current control to limit startup current, and a full suite of protection features, the AMT49413 includes the required logic to spin a motor without any code-allowing shorter design cycles. The AMT49413 is a 3-phase brushless DC (BLDC) motor controller for use with N-channel external power MOSFETs designed for automotive and industrial applications.
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