Brushless DC Drivers

Three-Phase Sensorless Fan Driver with Integrated Closed-Loop Speed Control

A4942

Markets Served

The A4942 simplifies fan motor control with its sensorless design, integrated closed-loop speed control, and adjustable current limiting for quiet and efficient operation.

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Product Details

Top Features

  • Sensorless (no Hall sensors required)
  • Closed loop speed control
  • Minimal external components
  • PWM speed input
  • FG speed output
  • Lock detection
  • Soft start
  • Overcurrent protection
  • Soft switching for reduced audible noise
Target Application

Part Number Specifications and Availability

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A4942GESTR-T

supply_voltage_min_v
5
supply_voltage_max_v
16
peak_output_current_a
1.6
architecture
Integrated MOSFET
rds_on
1.2
commutation
Sinusoidal
motor_positioning_method
Sensorless
sleep_current
NA
current_sense_amplifiers
Integrated
temperature
-40°C to 105°C
package
20-Pin QFN
market
Industrial
typical_load_current_a
0-3

Design Tools

ECAD FILE

A4942

A4942 ECAD Model Type Image
Software

Software Portal

Technical Documentation

Improve Server Efficiency with Advanced Control Electronics
Application Note

Improve Server Efficiency with Advanced Control Electronics

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