说明
EMC2112是一款SMBus、闭环、基于RPM的风扇驱动程序,带有硬件(HW)热关闭和重置控制器。EMC2112提供了一个高侧风扇驱动器,能够从5V电源提供高达600mA的电源。
EMC2112利用贝塔补偿(用于热敏二极管的BJT或晶体管型号的实现)和电阻误差校正(REC)来精确监测多达三(3)个外部温度区域。这些特征允许在多个工艺几何形状上以及使用分立二极管连接的晶体管的CPU衬底热二极管具有很高的精度。可以在EMC2112上禁用Beta Compensation和REC,以在监测AMD热敏二极管时保持准确性。
EMC2112提供了一个独立的硬件热关机块。HW热关断逻辑可以基于PCB上SHDN_SEL引脚的捆扎电平配置为几种常见配置。HW热关闭点可以通过使用连接到TRIP_set引脚的分立电阻器以1°C的增量设置。
EMC2112还提供5V电源“电源良好”功能,阈值为4.5V。此功能在RESET#引脚上提供。
特性
- 1% accuracy with external clock input
- 3% accuracy with internal clock
- Internal clock can be used as a source
- Aging fan detection
- 600mA drive capability
- 1°C incremental set points for thermal shutdown
- Cannot be disabled by software
- Provides Reset Function (RESET#) On 5V Supply
- ±1°C accuracy (60°C to 100°C)
- 0.125°C resolution
- Designed to support 45nm, 65nm, and 90nm CPU Diodes using BJT and transistor model
- Eliminates temperature offset due to series resistance from PCB traces and thermal 'Diode'
- 5V supply for linear fan driver and reset generator
- User selectable SMBus address using pull-up resistor on ADDR_SEL pin
- Supports Block Read and Write functionality
- Available in 20-pin, 4x4 QFN RoHS Compliant package
- Notebook Computers
- Desktop Computers
- Embedded Applications
参数
类型 | 描述 |
# Fans Drivers | 1 |
PWM/Linear Control | Linear |
# RemoteTemperature Monitors | 3 |
Ambient Temperature Sensor | 1 |
Typical Accuracy | ±0.25 |
Max Accuracy | ±1.0 |
Temperature Max | 85 |
Temperature Min | 0 |
Vcc Max (V) | 5.0 |
Vcc Min (V) | 3.3 |
SMBus Alert | Yes |
System Shutdown | Yes |
Voltage Monitors | No |



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