A4915: 3-Phase MOSFET Driver

Description

The A4915 is designed for pulse width modulated (PWM) current control of 3-phase brushless DC motors. The A4915 is capable of high current gate drive for 6 all N-channel power MOSFETs. An internal charge pump ensures gate drive down to 7 V supply and provides limited gate drive down to 5 V. A bootstrap capacitor is used to generate a supply voltage greater than the source voltage of the high side MOSFET, required for N-channel MOSFETs.

Internal synchronous rectification control circuitry is provided to improve power dissipation in the external MOSFETs during PWM operation. Internal circuit protection includes latched thermal shutdown, dead time protection, and undervoltage lockout. Special power up sequencing is not required. 

Allegro recommended hall latches: APS13290-1.

The A4915 is supplied in a 28-pin TSSOP with an exposed thermal pad (suffix LP) and a 28-contact 5 × 5 mm QFN with an exposed thermal pad (suffix ET). These packages are lead (Pb) free, with 100% matte tin leadframe plating.

Top Features

  • 5 to 50 V supply voltage
  • Latched TSD with fault output
  • Drives six N-channel high current MOSFETs
  • Internally controlled synchronous rectification
  • Speed voltage input enables internal PWM duty cycle control of full bridge
  • Center aligned PWM
  • Internal UVLO and crossover current protection
  • Hall switch inputs
  • Adjustable dead time protection
  • Low power sleep mode for battery-powered applications

 A4915 Demo Board Video

The Allegro A4915 Three-Phase MOSFET Driver’s innovative speed input and fully integrated block commutation delivers simple speed control of a BLDC motor with a single analog voltage. Watch video to learn more. 

 A4915 Demo Board Video

The Allegro A4915 Three-Phase MOSFET Driver’s innovative speed input and fully integrated block commutation delivers simple speed control of a BLDC motor with a single analog voltage. Watch video to learn more. 

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A4915METTR-T 28-lead QFN -20°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A4915MLPTR-T 28-lead TSSOP -20°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
APEK4915MET-01-T DEMO BOARD -20°C to 105°C No -- Contact your
local sales rep
Check
Distributor Stock
APEK4915MLP-01-T DEMO BOARD -20°C to 105°C No -- 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

Packages

Design Support Tools

Presentations

When ordering an APEK4915MET-01-T demo board, please remember to order both part numbers:

Part Numbers  
APEK4915MET-01-T Demo Board
A4915METTR-T Sample Parts


When ordering an APEK4915MLP-01-T demo board, please remember to order both part numbers:

Part Numbers  
APEK4915MLP-01-T Demo Board
A4915MLPTR-T Sample Parts