A89331 & A89331-1: Three Phase Sensorless Drivers

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Description

The A89331 three-phase motor drivers incorporate sensorless sinusoidal drive to minimize vibration for high-speed server fans. Sensorless control eliminates the requirement for Hall sensors for server fan applications.

A flexible closed loop speed control system is integrated into the IC. EEPROM is used to tailor the common functions of the fan speed curve to a specific application. This eliminates the requirement for a microprocessor-based system and minimizes programming requirements.

The A89331 family is designed to offer the features best suited for your needs.  The A89331 offers power-loss braking (PLB) while the A89331-1 offers an AC loss feature. 

The A89331 ICs are available in a 28L 5x5 QFN with an exposed power pad (suffix ET) and a 20L TSSOP with an exposed power pad (suffix LP).

Featured Applications:

Server and Datacenter Cooling Fans

Top Features

  • Closed Loop Speed Control
  • Overvoltage Protection
  • Power Loss Brake – A89331
  • AC Loss – A89331-1
  • Fault Mode Brake
  • Configurable RD or FG Output
  • Speed Curve Configuration via EEPROM
  • I2C Serial port
  • Sinusoidal modulation for Reduced Audible Noise and Low vibration
  • Sensorless (No Hall Sensors required)
  • Trapezoidal Drive Option for High Speed
  • Low RDSON Power MOSFETs – 3A capability
  • Minimal External Components
  • PWM Duty Cycle Speed Input
  • FG Speed Output
  • Lock Detection
  • Soft Start
  • Shorted Load Protection

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
APEK89331GLP-01-T DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check
Distributor Stock
A89331GETSR 28-lead QFN -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A89331GETSR-1 28-lead QFN -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A89331GLPTR-T 20-lead TSSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock

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Packaging

ET QFN with exposed pad 28 lead

28 contact QFN with exposed thermal pad (suffix ET) 

ET Package Documentation

20-Pin eTSSOP with exposed thermal pad LP Package

20L TSSOP with exposed thermal pad (suffix LP)

LP Package Documentation

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