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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.
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 |
查看更多
技术文档
数据资料 | 风扇控制器及远端温度传感器,带有SMBus串行接口 | Jan 01, 2000 | |
设计指南 | Fan Speed Control Is Cool! | ||
应用笔记 | 改进风扇控制:关于风扇速度控制的考虑 | ||
设计指南 | Rev Up Your Fan-Speed Control Designs | ||
应用笔记 | Temperature Sensor ICs Simplify Designs |
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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.
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.
技术文档
数据资料 | 风扇控制器及远端温度传感器,带有SMBus串行接口 | Jan 01, 2000 | |
设计指南 | Fan Speed Control Is Cool! | ||
应用笔记 | 改进风扇控制:关于风扇速度控制的考虑 | ||
设计指南 | Rev Up Your Fan-Speed Control Designs | ||
应用笔记 | Temperature Sensor ICs Simplify Designs |