MAX6660
Info: : PRODUCTION
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MAX6660

Remote-Junction Temperature-Controlled Fan-Speed Regulator with SMBus Interface

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $4.47
Features
  • Integrated Thermal Sensing and Fan-Regulation Solution
  • Programmable Fan Threshold Temperature
  • Programmable Temperature Range for Full-Scale Fan Speed
  • Accurate Closed-Loop Fan-Speed Regulation
  • On-Chip Power Device Drives Fans Rated Up to 250mA
  • Programmable Under/Overtemperature Alarms
  • SMBus 2-Wire Serial Interface with Timeout (Cannot "Lock Up" the SMBus)
  • Supports SMBus Alert Response
  • ACPI Compatible, Including OVERT-bar System Shutdown Function
  • ±1°C (+60°C to +100°C) Thermal-Sensing Accuracy
  • MAX6660EVKIT Available
Additional Details
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The MAX6660 is a remote temperature sensor and fan-speed regulator that provides a complete fan-control solution. The remote temperature sensor is typically a common-collector PNP, such as a substrate PNP of a microprocessor, or a diode-connected transistor, typically a low-cost, easily mounted 2N3904 NPN type or 2N3906 PNP type.

The device also incorporates a closed-loop fan controller that regulates fan speed with tachometer feedback. The MAX6660 compares temperature data to a fan threshold temperature and gain setting, both programmed over the SMBus by the user. The result is automatic fan control that is proportional to the remote-junction temperature. The temperature feedback loop can be broken at any time for system control over the speed of the fan.

Fan speed is voltage controlled as opposed to PWM controlled, greatly reducing acoustic noise and maximizing fan reliability. An on-chip power device drives fans rated up to 250mA.

Temperature data is updated every 0.25s and is readable at any time over the SMBus interface. The MAX6660 is accurate to 1°C (max) when the remote junction is between +60°C to +100°C. Data is formatted as a 10-bit + sign word with 0.125°C resolution.

The MAX6660 is specified for -40°C to +125°C and is available in a 16-pin QSOP package.

Applications

  • Industrial Control Systems
  • Notebook Computers
  • PC
  • Servers
  • Telecom Systems
  • Workstations
Part Models 2
1ku List Price Starting From $4.47

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX6660AEE+
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  • HTML
MAX6660AEE+T
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  • HTML
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX6660EVSYS

Evaluation System/Evaluation Kit for the MAX6660

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MAX6660EVSYS

Evaluation System/Evaluation Kit for the MAX6660

Evaluation System/Evaluation Kit for the MAX6660

Features and Benefits

  • Measures and Displays Remote-Sensor Temperature
  • Controls Fan Speed
  • Programmable Alarms and Configuration
  • Operating Temperature Ranges
    • -40°C to +125°C (Remote Sensor)
    • 0°C to +70°C (Board)
  • I²C/SMBus Compatible
  • Easy-to-use Menu-Driven Software
  • Assembled and Tested
  • Includes Windows 95/98/2000-Compatible Software and Demo PC Board

Product Detail

The MAX6660 evaluation system (EV system) consists of a MAX6660 evaluation kit (EV kit) and a companion Maxim System Management Bus (SMBus™) interface board.

The MAX6660 EV kit is an assembled and tested PC board that demonstrates the MAX6660 remote temperature sensor and fan-speed regulator. It monitors the junction temperature of an external diode-connected transistor, and converts the temperature to 8-bit or 11-bit (extended resolution mode), 2-wire serial data. A 2N3906 temperature-sensor transistor comes soldered to the board in a SOT23 package, but it can be removed. The board can then be connected through a twisted pair to a remote diode close to your system. The MAX6660 also incorporates a closed-loop fan controller that regulates fan speed with tachometer feedback. Note: Use this EV kit data sheet in conjunction with the MAX6660 data sheet.

The Maxim SMBus interface board (MAXSMBus) allows an IBM®-compatible PC to use its parallel port to emulate an SMBus 2-wire interface. Windows® 95/98/2000-compatible software provides a user-friendly interface to exercise the features of the MAX6660. The program is menu driven and offers a graphic interface with control buttons and status display. (Note: Windows 2000 requires the installation of a driver; refer to Win2000.pdf or Win2000.txt located on the diskette.)

Order the MAX6660EVSYS for a complete IBM PC-based evaluation of the MAX6660. Order the MAX6660EVKIT if you already have an SMBus interface.

Applications

  • Industrial Control Systems
  • Notebook Computers
  • PC
  • Servers
  • Telecom Systems
  • Workstations

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