具有 1 条远程和本地通道的温度传感器,带自动风扇转速控制与故障检测功能

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产品详细信息

参数

Local sensor accuracy (Max) (+/- C) 2 Type Fan Controller Operating temperature range (C) -40 to 125 Supply voltage (Min) (V) 2.7 Interface type SMBus Supply voltage (Max) (V) 5.5 Supply current (Max) (uA) 2000 Temp resolution (Max) (bits) 11 Features PWM output, Tachometer Remote channels (#) 1 Addresses 9 Rating Catalog open-in-new 查找其它 数字温度传感器

封装|引脚|尺寸

SSOP (DBQ) 16 29 mm² 4.9 x 6 open-in-new 查找其它 数字温度传感器

特性

  • Remote Temperature Sensor:
    ±2°C Accuracy, 0.125°C Resolution
  • Local Temperature Sensor:
    ±2°C Accuracy, 0.125°C Resolution
  • PWM Controller
  • PWM Frequency: 10Hz to 40kHz
    Duty Cycle: 0% to 100%, 8 Bits
  • Automatic Fan Speed Control Loops
  • SMBus Interface
  • Power: 2.7V to 5.5V
  • Package (Green): QSOP-16 (4mm × 5mm)
  • RoHS Compliant
  • APPLICATIONS
    • Notebook and Desktop PCs
    • Network Servers
    • Telecommunications Equipment
    • PC-Based Equipment
    • DLP and LCD Projectors

DLP is a trademark of Texas Instruments.
Pentium M, Pentium-IV are trademarks of Intel.
JMC is a trademark of JMC Products.
I2C is a trademark of Philips International, Inc.
All other trademarks are the property of their respective owners.

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描述

The AMC6821 is an intelligent temperature monitor and pulse-width modulation (PWM) fan controller. It is designed for noise-sensitive or power-sensitive applications that require active system cooling. Using either a low-frequency or a high-frequency PWM signal, this device can simultaneously drive a fan, monitor remote sensor diode temperatures, and measure and control the fan speed so that it operates with minimal acoustic noise at the lowest possible speed.

The AMC6821 has three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode. Each mode controls the fan speed by changing the duty cycle of a PWM output. Auto Temperature-Fan mode is an intelligent, closed-loop control that optimizes fan speed according to user-defined parameters. This mode allows the AMC6821 to run as a stand-alone device without CPU intervention; the fan can continue to be controlled (based on temperature measurements) even if the CPU or system locks up. Software-RPM mode is a second closed-loop control. In this mode, the AMC6821 adjusts the PWM output to maintain a consistent fan speed at a user-specified target value; that is, the device functions as a fan speed regulator. Software-RPM mode can also be used to allow the AMC6821 to operate as a stand-alone device. The third mode, Software-DCY, is open-loop. In Software-DCY mode, the PWM duty cycle is set directly by the value written to the device.

The AMC6821 has a programmable SMBALERT output to indicate error conditions and a dedicated FAN-FAULT output to indicate fan failure. The THERM pin is a fail-safe output for over-temperature conditions that can be used to throttle a CPU clock. Additionally, the OVR pin indicates the over-temperature limit as well. All of the alarm thresholds are set through the device registers. The AMC6821 is available in a QSOP-16 package.

open-in-new 查找其它 数字温度传感器
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技术文档

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类型 标题 下载最新的英文版本 发布
* 数据表 Intelligent Temperature Monitor and PWM Fan Controller 数据表 2007年 7月 26日
技术文章 How to choose the right thermistor for your temperature sensing application 2020年 2月 12日
技术文章 How to enable thermal safety for automotive infotainment and cluster systems 2019年 10月 15日
技术文章 Driving industrial innovation with small-size sensors 2019年 9月 12日
技术文章 How sensor technology is evolving to meet cold chain needs 2018年 6月 18日
用户指南 AMC6821EVM and AMC6821EVM-PDK 2009年 2月 23日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

硬件开发

评估板 下载
document-generic 用户指南
499
说明

The AMC6821EVM features the AMC6821 Analog Monitoring and Control Circuit device. The AMC6821EVM is a simple evaluation module designed to evaluate the functionality of the this AMC device. The AMC6821 supports the SMBus as its standard serial communication interface data rates of up to 100 kHz (...)

特性
  • J4 on the EVM can be used to access the AMC6821 device through a custom built cable
  • The EVM includes three LED alarm indicators to visually show the user what external temperature conditions exist
  • Power resistor R25 is used to sense external remote temperature and control temperatue using an N-channel (...)
评估板 下载
document-generic 用户指南
499
说明

The AMC6821EVM-PDK from TI is a board that uses the USB-MODEVM as the host platform connected to the AMC6821EVM. With this arrangement the EVM-PDK can be used as a complete thermal management kit solution with several fan hardware configurations and temperature sensing options. The cables are (...)

特性
  • Connectors (J2 and P2) provide pass through connection from the PDK to the AMC6821EVM
  • The J1 header is included for easy plug-in of standard connectors that come with a majority of cooling fans
  • The only required power connection for the USB-MODEVM is the USB cable
  • Each power supply has an LED that (...)

软件开发

驱动程序和库 下载
用于 AMC6821 的 Linux 驱动程序
AMC6821SW-LINUX Linux 驱动程序支持 AMC6821 温度监控和风扇控制。Linux 驱动程序支持通过 I2C 总线和接口与硬件监控子系统进行通信。
Linux 主线状态

在 Linux 主线中提供:是
可通过 git.ti.com 获取:不适用

支持的器件:
  • amc6821
Linux 源文件

与该器件关联的文件为:

  1. drivers/hwmon/amc6821.c
  2. Documentation/hwmon/amc6821
源文件

drivers/hwmon/amc6821.c

其他文件

Documentation/hwmon/amc6821

 

启用驱动程序支持

使用“make menuconfig”(也可以使用“make xconfig”或“make nconfig”)配置内核 

Menuconfig 位置

 (...)

设计工具和仿真

仿真模型 下载
SLAC187.ZIP (14 KB) - IBIS Model

CAD/CAE 符号

封装 引脚 下载
SSOP (DBQ) 16 了解详情

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