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ML4428

Features: ·Stand-alone operation with forward and reverse·On-board start sequence: Sense Position Æ Drive Æ Accelerate Æ Set Speed·No backward movement at start-up·Patented back-EMF commutation technique·Simple variable speed control with on-board reference·Single external resist...

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SeekIC No. : 004422060 Detail

ML4428: Features: ·Stand-alone operation with forward and reverse·On-board start sequence: Sense Position Æ Drive Æ Accelerate Æ Set Speed·No backward movement at start-up·Patented back-EM...

ML4428 Data Sheet

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Part Number:
ML4428
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/26

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Product Details

Description



Features:

·Stand-alone operation with forward and reverse
·On-board start sequence: Sense Position Æ Drive Æ Accelerate Æ Set Speed
·No backward movement at start-up
·Patented back-EMF commutation technique
·Simple variable speed control with on-board reference
·Single external resistor sets all critical currents
·PWM control for maximum efficiency or linear control for minimum noise
·12V operation provides direct FET drive for 12V motors
·Drives high voltage motors with high side FET drivers
·Guaranteed no shoot-through when driving external FET gates directly


Pinout

Connection Diagram


Specifications

Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.

Supply Voltage (pin 14) ............................................. 14V
Output Current (pins 2, 3, 4, 9,10,11) ...................±50mA
Logic Inputs (pins 12, 25) ................................ 0.3 to 7V
Junction Temperature ............................................ 150°C
Storage Temperature Range ..................... 65°C to 150°C
Lead Temperature (Soldering 10 sec.) .................... 260°C
Thermal Resistance (qJA)
Plastic DIP ....................................................... 52°C/W
Plastic SOIC..................................................... 75°C/W


Description

The ML4428 motor controller provides all of the functions necessary for starting and controlling the speed of delta or wye-wound Brushless DC (BLDC) Motors without the need for Hall Effect sensors.

Back-EMF voltage of ML4428 is sensed from the motor windings to determine the proper commutation phase sequence using PLL techniques. The patented back-EMF sensing technique used will commutate virtually any 3-phase BLDC motor that has at least a 30% variation in inductance during rotation and is insensitive to PWM noise and motor snubbing circuitry.

The ML4428 also utilizes a patented start-up technique which samples the rotor position and applies the proper drive to accelerate the motor. This ensures no reverse rotation at start-up and reduces total start-up time.




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