A4919: Three Phase MOSFET Driver with Integrated Regulator

Description

The A4919 is a three-phase controller for use with n-channel external power MOSFETs.

A unique charge pump regulator provides full (>10V) gate drive for battery voltages down to 7V and will allow the A4919 to operate with a reduced gate drive down to 5.5V. A bootstrap capacitor is used to provide the above battery supply voltage required for n-channel MOSFETs.

One logic level input is provided for each of the six power MOSFETs in the 3-phase bridge, allowing motors to be driven with any commutation scheme defined by an external controller. The power MOSFETs are protected from cross-conduction by integrated crossover control. Motor phase short to supply and short to ground detection is provided by independent drain-source voltage monitors on each FET. Short faults, supply under-voltage, and chip over temperature conditions are indicated by a single open drain fault output.

Product variants incorporating a low drop out (LDO) regulator to source either 5.0V or 3.3V to external circuitry are available. Those providing a 5.0V output are differentiated by a ‘-5’ part number suffix and 3.3V by ‘-3’.

The A4919 is supplied in a 28-pin TSSOP power package with an exposed thermal pad (package type LP) as well as a 28-pin QFN with an exposed thermal pad (package type ET) will be available in March 2018. Both packages are available in lead (Pb) free versions, with 100% matte tin lead frame plating (suffix –T).

Top Features

  • High current 3-phase gate drive for n-channel MOSFETs
  • Individual inputs/control for each MOSFET
  • 5.5V to 50V Supply Voltage Range
  • Optional Regulated Logic Supply Voltage Output(3V and 5V)
  • Motor phase short to supply and short to ground detection
  • Under voltage, over temperature monitor
  • Cross-conduction protection
  • Low Current Sleep Mode

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A4919GETTR-3-T 28-lead QFN -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A4919GETTR-5-T 28-lead QFN -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A4919GETTR-T 28-lead QFN -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A4919GLPTR-3-T 28-lead TSSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A4919GLPTR-5-T 28-lead TSSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A4919GLPTR-T 28-lead TSSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

Packaging

A4919 Packages