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MAX6650 - Fan-Speed Regulators and Monitors

Description

The MAX6650/MAX6651 fan controllers use an SMBus/I2C-compatible interface to regulate and monitor the speed of 5VDC/12VDC brushless fans with builtin tachometers.

Features

  • Closed/Open-Loop Fan-Speed Control for 5V/12V Fans.
  • 2-Wire SMBus/I2C-Compatible Interface.
  • Monitors Tachometer Output Single Tachometer (MAX6650) Up to Four Tachometers (MAX6651).
  • Programmable Alert Output.
  • GPIOs.
  • Hardware Full-On Override.
  • Synchronize Multiple Fans.
  • Four Selectable Slave Addresses.
  • 3V to 5.5V Supply Voltage.
  • Small Packages 10-Pin µMAX (MAX6650) 16-Pin QSOP (MAX6651) Ordering Information.

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Datasheet preview – MAX6650

Datasheet Details

Part number MAX6650
Manufacturer Maxim
File Size 205.94 KB
Description Fan-Speed Regulators and Monitors
Datasheet download datasheet MAX6650 Datasheet
Additional preview pages of the MAX6650 datasheet.

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Full PDF Text Transcription

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EVALUATION KIT AVAILABLE MAX6650/MAX6651 Fan-Speed Regulators and Monitors with SMBus/I2C-Compatible Interface General Description The MAX6650/MAX6651 fan controllers use an SMBus/I2C-compatible interface to regulate and monitor the speed of 5VDC/12VDC brushless fans with builtin tachometers. They automatically force the fan’s tachometer frequency (fan speed) to match a preprogrammed value in the Fan-Speed Register by using an external MOSFET or bipolar transistor to linearly regulate the voltage across the fan. The MAX6650 regulates the speed of a single fan by monitoring its tachometer output. The MAX6651 also regulates the speed of a single fan, but it contains additional tachometer inputs to monitor up to four fans and control them as a single unit when they are used in parallel.
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