MAX31785

PRODUCTION

6-Channel Intelligent Fan Controller

Intelligent Fan Controller Cost-Effectively Improves System Energy Efficiency and Reliability

Data Sheet (Rev. 3) Product Selection Table
Part Models
4
1ku List Price
Starting From $4.56
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Part Details

  • Six Independent Channels of Fan Control
    • Supports 3-Wire and 4-Wire Fans
    • Automatic Closed-Loop Fan Speed Control
    • RPM- or PWM-Based Control
    • Optional Manual Mode Control
    • Fast and Slow PWM Frequency Options
    • Staggered Fan Spin-Up Eases Power-Supply Stress
    • Dual Tachometer (12-Fan Support)
    • Fan-Fault Detection
    • Fan-Health Status Meter
    • Nonvolatile Fan Operating Run Time Meter
  • Supports Up to 11 Temperature Sensors
    • Up to Six External Thermal Diodes with Automatic Series Resistance Cancellation
    • One Internal Temperature Sensor
    • Up to Four I²C Digital Temperature Sensors
    • Fault Detection on All Temperature Sensors
  • Available 6-Channel ADC to Measure Remote Voltages
  • PMBus™-Compliant Command Interface
  • I²C/SMBus-Compatible Serial Bus with Bus Timeout Function
  • On-Board Nonvolatile Fault Logging and Default Configuration Setting
  • No External Clocking Required
  • +3.3V Supply Voltage
MAX31785
6-Channel Intelligent Fan Controller
MAX31785: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

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Software Resources

Device Drivers 1

Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
MAX34441
Obsolete PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller
Product 1
MAX31782
System Management Microcontroller
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Tools & Simulations

Software Development 1

Evaluation Kits

MAX31785K

Evaluation Kit for the MAX31785

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Features and Benefits

  • Easy Evaluation of the MAX31785
  • USB HID interface
  • Windows XP®- and Windows® 7-Compatible Software
  • RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX31785 evaluation kit (EV kit) provides the hardware and software graphical user interface (GUI) necessary to evaluate the MAX31785 6-channel intelligent fan controller. The EV kit includes a MAX31785ETL+ installed, as well as a 12V fan and USB-to-I2C module to communicate with the PC.

Applications

  • Base Stations
  • Industrial Controls
  • Network Switches/Routers
  • Servers
  • Smart Grid Network Systems
MAX31785K
Evaluation Kit for the MAX31785

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