A4919
Three-Phase MOSFET Driver
with Integrated Regulator
DESCRIPTION
The A4919 is a three-phase controller for use with N-channel
external power MOSFETs.
FEATURES AND BENEFITS
• High-current 3-phase gate drive for N-channel MOSFETs
• 5.5 to 50 V supply voltage range
• Regulated logic supply voltage output option
• Low-current Sleep mode option
• Motor phase short-to-supply and short-to-ground detection
• Cross-conduction protection
Auniquechargepumpregulatorprovidesfull(>10V)gatedrive
at power supply voltages down to 7 V and allows the A4919
to operate with reduced gate drive at power supply voltages
down to 5.5 V. A bootstrap capacitor is used to provide the
abovepowersupplyvoltagerequiredforN-channelMOSFETs.
• Undervoltage, overtemperature monitors
One logic-level input is provided for each of the six power
MOSFETs in the 3-phase bridge, allowing motors to be driven
withanycommutationschemedefinedbyanexternalcontroller.
The power MOSFETs are protected from cross-conduction by
integrated crossover control.
APPLICATIONS
• Lawn and garden equipment
• Battery-operated power tools
• Industrial grinders
• Continuous positive airway pressure (CPAP) machines
• Vacuum cleaners
Motor phase short-to-supply and short-to-ground detection
is provided by independent drain-source voltage monitors on
each MOSFET. Short faults, supply undervoltage, and chip
overtemperature conditions are indicated by a single open-
drain fault output.
PACKAGE:
28-pin TSSOP
with exposed thermal pad
(suffix LP)
Productvariantsincorporatingalowdropout(LDO)regulatorto
source either 5.0 V or 3.3 V to external circuitry are available.
TheA4919 is supplied in a 28-pin TSSOPpower package with
exposed thermal pad (package type LP) and a 28-terminal
5 mm × 5 mm × 0.90 mm QFN package with exposed thermal
pad. Both packages are lead (Pb) free, with 100% matte-tin
leadframe plating (suffix T).
28-terminal
5 mm × 5 mm QFN
with exposed thermal pad
(suffix ET)
Not to scale
Typical Application Diagram
V+
VDD
3-Phase
BLDC
A4919
Motor
Micro-
controller
A4919-DS, Rev. 5
MCO-0000329
January 25, 2019