MAX31740ATA+ by Analog Devices

Ultra-Simple Fan-Speed Controller


The MAX31740 is a sophisticated, yet easy-to-use fan-speed controller. It monitors the temperature of an external NTC thermistor and generates a PWM signal that can be used to control the speed of a 2-, 3-, or 4-wire fan. The fan control characteristics are set using external resistors, thereby eliminating the need for an external microcontroller. Controllable characteristics include the starting temperature for fan control, PWM frequency, fan speed at low temperatures, and slope of the temperature-duty-cycle transfer function. Because the operating characteristics are selected by hardwired passive components, a simple, low-cost fan-speed controller can be implemented without the need for firmware development. This can dramatically reduce development time for the fan control function. The MAX31740 is available in a 2mm x 3mm, 8-pin TDFN package.

Where to Buy

Prices starting from US$0.48

Distributor Stock
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Farnell
from US$0.48
No stock
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element14
from US$0.58
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Features

Self-Contained PWM Fan Control—No Micro Needed
Controls Speed of 2-, 3-, or 4-Wire Fans
Resistors Set Fan Control Characteristics
Smooth, Linearly Varying PWM Duty Cycle Minimizes Audibility of Fan Noise
Accurately Monitors External Thermistor Temperature
3.0V to 5.5V Operating Voltage Range
-40°C to +125°C Operating Temperature Range
AEC-Q100 qualified MAX31740ATA/VY+

Specifications

Sensor Type Remote
Fan Control PWM
Temp. Thresh. (°C) Programmable
Package/Pins TDFN/8
BudgetaryPrice (See Notes) 0.55


MAX31740ATA+ Semiconductors - ICs by Analog Devices

FAN SPEED CONTROLLER TDFN-8

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

Specifications

Motor Type PWM
No. of Outputs 1Outputs
Output Current -
Output Voltage -
Driver Case Style TDFN
No. of Pins 8Pins
Supply Voltage Min 3V
Supply Voltage Max 5.5V
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited

Alternative Descriptions

FAN SPEED CONTROLLER, TDFN-8 | element14

Frequently Asked Questions

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Is the MAX31740ATA+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including element14 and Farnell have stock available or on a lead time for MAX31740ATA+ .

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