Overview

Features and Benefits

  • Monitors up to 10 Remote Temperature Sensors
  • Monitors and Controls Speed of up to 4 Fans Independently
  • PWM Outputs Drive each Fan under Software Control
  • FULL_SPEED Input Allows Fans to be Blasted 100% by External Hardware
  • SMBALERT Interrupt Signals Failures to System Controller

  • Tristate ADDR Pin Allows up to 3 Devices on a Single Bus
  • Temperature Decoder Interprets TMP05/TMP06 Temperature Sensors and Communicates Values over I2C Bus
  • Limit Comparison of All Monitored Values

Product Details

The ADT7470 controller is a multichannel temperature sensor and PWM fan controller and fan speed monitor for noise sensitive systems requiring active system cooling. It is designed to interface directly to an I2C bus and control/monitor the fans using a service processor. The aim is to quickly develop systems that are modular and can easily be expanded depending on the system’s cooling requirements. The device can monitor up to ten temperature sensors. It can also monitor and control the speed of four fans so that they operate at the lowest possible speed for minimum acoustic noise. A FULL_SPEED input is provided to allow the fans to be “blasted” to 100% via external hardware control, under extreme thermal conditions or on system startup. An SMBALERTinterrupt communicates error conditions such as fan underspeed, fan failure to the system service processor. Individual error conditions can then be read from status registers over the I2C bus. In the event of a fan failure condition, any or all PWM outputs can be programmed to automatically adjust to 100% to provide failsafe cooling.


Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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Evaluation Boards Pricing displayed is based on 1-piece.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.