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AMT49413 Datasheet(PDF) 1 Page - Allegro MicroSystems |
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AMT49413 Datasheet(HTML) 1 Page - Allegro MicroSystems |
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1 / 21 page  AMT49413 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 cost- effective three-phase motor drive system. TheAMT49413providesfunctionalityoverawideinputsupply range. A unique charge pump regulator provides adequate (>10V) gate drive for battery voltages down to 7V, and allows the device to operate with a reduced gate drive at battery voltages down to 5.5V. 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 14V. 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 selection of an input reference voltage and external sensing resistor. The PWM frequency is set by a user-selectedexternalRCtimingnetwork.Foraddedflexibility, AMT49413-DS FEATURES AND BENEFITS ▪ Highcurrent3-phasegatedriveforN-channelMOSFETs ▪ Synchronousrectification ▪ Cross-conductionprotection ▪ Chargepumpandtop-offchargepumpfor100%PWM ▪ Integratedcommutationdecoderlogic ▪ Operationover5.5to50Vsupplyvoltagerange ▪ Extensivediagnosticsoutput ▪ Provides+5VHallsensorpower ▪ Low-currentsleepmode 3-Phase BLDC Controller and MOSFET Driver Typical Application Continued on the next page… PACKAGE: 48-Lead QFN with exposed thermal pad (suffix EV) Not to scale AMT49413 3-Phase BLDC Motor Direction Run/Stop Current Limit VBAT+ October 26, 2016 |
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