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风扇控制器及远端温度传感器,带有SMBus串行接口

业内首款可提供PWM、线性风扇控制的温度传感器

产品详情

The MAX1669 fan controller includes a precise digital thermometer that reports the temperature of a remote sensor. The remote sensor is a diode-connected transistor-typically a low-cost, easily mounted 2N3906 PNP type-replacing conventional thermistors or thermocouples. Remote accuracy is ±3°C for transistors from multiple manufacturers, with no calibration needed. The MAX1669 has an independent fan controller with a low-current logic output requiring external power components to interface to a DC brushless fan. The fan controller has two modes of operation: a low-frequency (20Hz to 160Hz) PWM mode intended for driving the fan motor, or a high-impedance DAC output that generates a variable DC control voltage. In PWM mode, the FAN frequency can be synchronized to an external clock.

Other key features include general-purpose inputs/outputs (GPIOs) for fan presence detection and a thermostat output intended as a fan override signal in case the host system loses the ability to communicate. The internal ADC has a wide input voltage range and gives overrange readings when too large an input voltage is applied. Other error-checking includes temperature out-of-range indication and diode open/short faults.

The MAX1669 is available in a space-saving 16-pin QSOP package that allows it to fit adjacent to the SLOT1 connector.

主要特征

  • Measures Remote CPU Temperature
  • No Calibration Required
  • 20Hz to 160Hz PWM Output for Fan
  • PWM Frequency Sync Input (260kHz)
  • Flexible Fan Interface: Linear or PWM
  • SMBus 2-Wire Serial Interface
  • Programmable Under/Overtemperature Alarms
  • ALERT-bar Latched Interrupt Output
  • OVERT-bar Thermostat Output
  • Two GPIO Pins
  • Write-Once Configuration Protection
  • Supports SMBus Alert Response
  • ±3°C Temperature Accuracy (-40°C to +125°C, remote)
  • 3µA Standby Supply Current
  • +3V to +5.5V Supply Range
  • Small 16-Pin QSOP Package
  • Remote diode sensor, PWM and linear fan control, dual alarms

应用/用途

  • 计算机:台式机、工作站和服务器
  • 笔记本电脑
  • Pentium® CPU冷却装置
  • 服务器
  • 工作站
Parametric specs for Fan Controllers
Interface 2-Wire/I2C/SMBus
Sensor Type Remote
Fan Control PWM
Accuracy (±°C) 3
Temp. Thresh. (°C) Programmable
Temp. Resolution (bits) 8
Package/Pins QSOP/16
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简化框图

MAX1669:典型工作电路 MAX1669:典型工作电路 Zoom icon

技术文档

设计与质量

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参量

Parametric specs for Fan Controllers
Interface 2-Wire/I2C/SMBus
Sensor Type Remote
Fan Control PWM
Accuracy (±°C) 3
Temp. Thresh. (°C) Programmable
Temp. Resolution (bits) 8
Package/Pins QSOP/16

主要特征

  • Measures Remote CPU Temperature
  • No Calibration Required
  • 20Hz to 160Hz PWM Output for Fan
  • PWM Frequency Sync Input (260kHz)
  • Flexible Fan Interface: Linear or PWM
  • SMBus 2-Wire Serial Interface
  • Programmable Under/Overtemperature Alarms
  • ALERT-bar Latched Interrupt Output
  • OVERT-bar Thermostat Output
  • Two GPIO Pins
  • Write-Once Configuration Protection
  • Supports SMBus Alert Response
  • ±3°C Temperature Accuracy (-40°C to +125°C, remote)
  • 3µA Standby Supply Current
  • +3V to +5.5V Supply Range
  • Small 16-Pin QSOP Package
  • Remote diode sensor, PWM and linear fan control, dual alarms

应用/用途

  • 计算机:台式机、工作站和服务器
  • 笔记本电脑
  • Pentium® CPU冷却装置
  • 服务器
  • 工作站

描述

The MAX1669 fan controller includes a precise digital thermometer that reports the temperature of a remote sensor. The remote sensor is a diode-connected transistor-typically a low-cost, easily mounted 2N3906 PNP type-replacing conventional thermistors or thermocouples. Remote accuracy is ±3°C for transistors from multiple manufacturers, with no calibration needed. The MAX1669 has an independent fan controller with a low-current logic output requiring external power components to interface to a DC brushless fan. The fan controller has two modes of operation: a low-frequency (20Hz to 160Hz) PWM mode intended for driving the fan motor, or a high-impedance DAC output that generates a variable DC control voltage. In PWM mode, the FAN frequency can be synchronized to an external clock.

Other key features include general-purpose inputs/outputs (GPIOs) for fan presence detection and a thermostat output intended as a fan override signal in case the host system loses the ability to communicate. The internal ADC has a wide input voltage range and gives overrange readings when too large an input voltage is applied. Other error-checking includes temperature out-of-range indication and diode open/short faults.

The MAX1669 is available in a space-saving 16-pin QSOP package that allows it to fit adjacent to the SLOT1 connector.

简化框图

MAX1669:典型工作电路 MAX1669:典型工作电路 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索您所需的答案。

过滤搜索

Maxim专业的应用工程师团队也可以为您解答技术问题,请 访问Maxim的 支持中心