LM96063 1 remote and local temp sensor fan controller with acoustic fan noise reduction | TI.com

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1 remote and local temp sensor fan controller with acoustic fan noise reduction



The LM96063 is remote diode temperature sensors with integrated fan control that includes remote diode sensing. The LM96063 accurately measures: (1) its own temperature and (2) the temperature of a diode-connected transistor, such as a 2N3904, or a thermal diode commonly found on Computer Processors, Graphics Processor Units (GPU) and other ASIC's.

The LM96063 also features an integrated, pulse-width-modulated (PWM), open-drain fan control output. Fan speed is a combination of the remote temperature reading, the lookup table and register settings. The 12-step Lookup Table (LUT) enables the user to program a non-linear fan speed vs. temperature transfer function often used to quiet acoustic fan noise. In addition a fully programmable ramping function has been added to allow smooth transitions between LUT setpoints.

The LM96063 is targeted mainly for a transistor MMBT3904 used as thermal diodes or thermal diodes found in many FPGAs, ASICs, and processors on SOI processes. The LM96163 is identical to the LM96063 except the TruTherm BJT Beta compensation is enabled at power up that is targeted for thermal diodes found on popular processors using bulk non SOI processes.


  • Accurately Senses Remote Diode-Connected MMBT3904 Transistors or Thermal Diodes On-Board Processors, FPGAs or ASICs
  • Accurately Senses Its Own Local Die Temperature
  • Offset Register can Adjust for a Variety of Thermal Diodes
  • Resolves Remote Temperatures up to 255.875°C
  • 10-bit Plus Sign and 11-bit Unsigned Data Formats, with 1/8°C Resolution
  • Digital Filter of Remote Data Lowers Noise and Improves Resolution to 1/32°C
  • Integrated PWM Fan Speed Control Output Supports High Resolution at 22.5kHz Frequency for 4-Pin Fans
  • Acoustic Fan Noise Reduction with User-Programmable 12-Step Lookup Table
  • LUT Transition Fine Resolution Smoothing Function
  • Tachometer Input for Measuring Fan RPM with Smart-Tach Modes for Measuring RPM of Fans when Pulse-Width-Modulating an Actual Power
  • ALERT Output for Error Event Notification
  • TCRIT Output for Critical Temperature System Shutdown
  • SMBus 2.0 Compatible Interface, Supports TIMEOUT
  • WSON Packages

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Part number Order Device type Interface Local sensor accuracy (Max) (+/- C) Temp resolution (Max) (bits) Operating temperature range (C) Supply voltage (Min) (V) Supply voltage (Max) (V) Supply current (Max) (uA) Features Remote channels (#) Addresses Rating Package Group Package size: mm2:W x L (PKG)
LM96063 Order now Fan Controller     SMBus     3     11     -40 to 85     3     3.6     825     1 PWM output with a 12-step lookup table, 1 tachometer input, ALERT, TCRIT     1     1     Catalog     WSON | 10     10WSON: 9 mm2: 3 x 3 (WSON | 10)