MAX31785ETL+ by Analog Devices

6-Channel Intelligent Fan Controller


The MAX31785 is a closed-loop multichannel fan controller. Automatic closed-loop fan control saves system power by operating the fans at the lowest possible speeds. Added benefits of slower fan speeds include lower audible noise, longer fan life, and reduced system maintenance. Based on a user-programmable lookup table (LUT), the device automatically adjusts the speeds of the six independent fans based on one or more of the 11 available temperature sensors. Alternately, an external host can manually command the fan speeds and the device automatically adjusts the fan speeds. The device contains a fan-health-diagnostic function to help users predict impending fan failures. The device can also monitor up to six remote voltages.

Where to Buy

Prices starting from US$6.50

Distributor Stock
Logo for Newark
Newark Electronics
from US$6.50
354
in stock
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Logo for element14 Singapore
element14
from US$7.03
246
in stock
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Logo for Farnell UK
Farnell
from US$6.70
246
in stock
Buy Now
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Features

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 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
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
PMBusâ„¢-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

Specifications

Fan Controller Functions Dual Temperature AlarmsFan Failure DetectorRemote & Local SensorTemperature Switch/Temperature Comparator
Interface 2-Wire/I2C/SMBus
Sensor Type Remote
Fan Control PWM
Accuracy (±°C) 2
Temp. Thresh. (°C) Programmable
Temp. Resolution (bits) 12
Package/Pins TQFN/40
BudgetaryPrice (See Notes) 5.54

Last 6 months Inventory & Pricing History



MAX31785ETL+ Semiconductors - ICs by Analog Devices

FAN CONTROLLER 6-CH TQFN-40

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Motor Type -
No. of Outputs 6Outputs
Output Current -
Output Voltage -
Driver Case Style TQFN
No. of Pins 40Pins
Supply Voltage Min 2.7V
Supply Voltage Max 5.5V
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Last 6 months Inventory & Pricing History


Alternative Descriptions

Fan Controller, 6-Ch, Tqfn-40 | Newark Electronics
FAN CONTROLLER, 6-CH, TQFN-40 | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX31785ETL+ ?

Additional datasheets, footprints and schematics for MAX31785ETL+ are listed on our Part Details page. You can also find images and similar parts to MAX31785ETL+ on this page.

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Is the MAX31785ETL+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX31785ETL+ have stock available?

Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX31785ETL+ .

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