Providesꢀ+5ꢀVꢀHallꢀsensorꢀpower
Low-currentꢀsleepꢀmode
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Highꢀcurrentꢀ3-phaseꢀgateꢀdriveꢀforꢀN-channelꢀMOSFETs
Synchronousꢀrectification
Cross-conductionꢀprotection
Chargeꢀpumpꢀandꢀtop-offꢀchargeꢀpumpꢀforꢀ100%ꢀPWM
Integratedꢀcommutationꢀdecoderꢀlogic
Operationꢀoverꢀ5.5ꢀtoꢀ50ꢀVꢀsupplyꢀvoltageꢀrange
Extensiveꢀdiagnosticsꢀoutput
AMT49413
3-Phase BLDC Controller and MOSFET Driver
FEATURES AND BENEFITS
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.
PACKAGE:
48-Lead QFN with exposed thermal pad
(suffix EV)
Internal fixed-frequency PWM current control circuitry can
be used to regulate the maximum load current. The peak load
currentlimitissetbytheselectionofaninputreferencevoltage
and external sensing resistor. The PWM frequency is set by a
user-selectedexternalRCtimingnetwork.Foraddedflexibility,
Not to scale
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Typical Application
VBAT+
Direction
Run/Stop
3-Phase
BLDC
Motor
AMT49413
Current
Limit
AMT49413-DS
October 26, 2016