MAX6665

Fan Controller/Driver with Factory-Programmed Temperature Thresholds


Please check latest availability status for a specific part variant.

Description

The MAX6665 is a fully integrated thermal switch with an internal power transistor for driving a cooling fan rated up to 24V and 250mA. When the MAX6665's temperature rises above a factory-programmed threshold, the active-low FANOUT pin becomes active and powers the fan.

The MAX6665 is available with factory-programmed fan activation threshold temperatures from +40°C to +70°C in 5°C increments. Accuracy of the fan activation trip point is ±1°C (typ) and ±3°C (max). The trip point's hysteresis is pin selectable to 1°C, 4°C, or 8°C. Two open-drain logic outputs indicate overtemperature con- ditions: active-low WARN is activated when the temperature is 15°C above the fan activation threshold, and OT is activated when the temperature is 30°C above the threshold. These features can be used to safely power down systems that are overheated.

The MAX6665 operates from a +2.7V to +5.5V power supply, and the associated fan can be powered from 4.5V to 24V. It is available in an 8-pin SO package and operates from -40°C to +125°C.
MAX6665: Typical Operating Circuit MAX6665: Typical Operating Circuit Enlarge+

Key Features

  • On-Chip 250mA Fan Switch
  • No External Components Required
  • Factory-Programmed Thresholds
  • Two Overtemperature Warning Signals
  • Pin-Selectable 1°C, 4°C, and 8°C Hysteresis
  • Low 65µA Supply Current

Applications/Uses

  • Card Racks
  • Laboratory Instruments
  • Notebook and Desktop Computers
  • PC Power Supplies
  • Servers
Part NumberFan Controller FunctionsFan Cntrl.InterfaceAccuracy
(±°C)
Temp. Thresh.
(°C)
Package/PinsBudgetary
Price
See Notes
MAX6665 Temperature Switch/Temperature ComparatorLinearLogic3Factory Programmed
SOIC (N)/8
$1.59 @1k
See All Fan Controllers (21)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

Tutorial 4679 Thermal Management Handbook

Quality and Environmental Data

Product Reliability Reports: MAX6665.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Temperature Family by Product Type
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
Status:
Package:
Temperature:

Related Resources


MAXM86161
Single-Supply Integrated Optical Module for HR and SpO2 Measurement

  • Complete Single-Channel Optical Data Acquisition System
  • Built-In Algorithm Further Enhances Rejection of Fast Ambient Transients
  • Optimized Architecture for Reflective Heart Rate and SpO2 Monitoring

MAX30208
±0.1°C Accurate, I2C Digital Temperature Sensor

  • High Accuracy and Precision
  • Low Power Consumption
  • Small Size

Type ID PDF Title
Tutorial 4679 Thermal Management Handbook

Belle Isle 2020
05/29/2020 - 05/31/2020, Detroit, MI
2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

RSVP