LM96163CISD/NOPB

FEATURES

• TruTherm BJT Beta Compensation Technology Supports 45nm, 65nm and 90nm Processor Remote Diodes

• Factory Trimmed for Intel® 45 nm Processor Thermal Diodes

• Accurately Senses Diode-Connected 2N3904 Transistors or Thermal Diodes On-board Large Processors or ASIC's

• Accurately Senses its Own Temperature

• Integrated PWM Fan Speed Control Output Supports High Resolution at 22.5kHz Frequency for 4-pin Fans

• Acoustic Fan Noise Reduction with UserProgrammable 12-Step Lookup Table

• LUT Transition Fine Resolution Smoothing Function

• Tachometer Input for Measuring Fan RPM

• Smart-Tach Modes for Measuring RPM of Fans with Pulse-Width-Modulated Power as Shown in Typical Application

• ALERT Output for Processor Event Notification

• TCRIT Output for Critical Temperature System Shutdown

• Offset Register Can Adjust for a Variety of Thermal Diodes

• 10-Bit Plus Sign and 11-Bit Unsigned Formats, with 1/8°C Resolution

• Extended Resolution to 1/32°C when Digital Filter Enabled

• Resolves Remote Diode Temperatures up to 255.875°C • SMBus 2.0 Compatible Interface, with TIMEOUT and ARA

• 10-Pin SON Package

APPLICATIONS

• Processor Thermal Management

• Electronic Test and Office Equipment

• Industrial Controls

DESCRIPTION

The LM96163 has remote and local temperature sensors with integrated fan control that includes TruTherm BJT transistor beta compensation technology for remote diode sensing. The LM96163 accurately measures: its own temperature and 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 LM96163 has an offset register to correct for errors caused by different nonideality factors of other thermal diodes. 

The LM96163 also features an integrated, pulse width-modulated (PWM), open-drain fan control output. Fan speed depends on 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.

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