参数资料
| 型号： | ADT7467BBZEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 36/72页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR ADT7467 |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi |
| 标准包装： | 1 |
| 系列： | dBCool® |
| 传感器类型： | 温度 |
| 传感范围： | -40°C ~ 120°C |
| 接口： | SMBus（2 线/I²C） |
| 灵敏度： | ±1.5°C |
| 电源电压： | 3 V ~ 5.5 V |
| 嵌入式： | 否 |
| 已供物品： | 板，缆线，CD |
| 已用 IC / 零件： | ADT7467 |
| 其它名称： | EVAL-ADT7467EBZ EVAL-ADT7467EBZ-ND |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页当前第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页
ADT7467
Mux Configuration Example
This is an example of how to configure the mux in a
system using the ADT7467 to control three fans. The CPU
fan sink is controlled by PWM1, the front chassis fan is
controlled by PWM2, and the rear chassis fan is controlled
by PWM3. The mux is configured for the following fan
control behavior:
? PWM1 (CPU fan sink) is controlled by the fastest speed
calculated by the local (VRM temperature) and
Remote 2 (processor) temperature. In this case, the
CPU fan sink is also used to cool the VRM.
? PWM2 (front chassis fan) is controlled by the Remote 1
temperature (ambient).
? PWM3 (rear chassis fan) is controlled by the Remote 1
temperature (ambient).
Example Mux Settings
<7:5> (BHVR), PWM1 Configuration Register 0x5C
101 = fastest speed calculated by local and Remote 2
temperature controls PWM1
<7:5> (BHVR), PWM2 Configuration Register 0x5D
000 = Remote 1 temperature controls PWM2
<7:5> (BHVR), PWM3 Configuration Register 0x5E
000 = Remote 1 temperature controls PWM3
These settings configure the mux as shown in Figure 55.
Thermal Calibration
100%
PWM
MIN
Ramp Control
(Acoustic
Enhancement)
PWM
CONFIG
PWM
Generator
PWM1
T MIN
100%
REMOTE 2 =
CPU TEMP
0%
T RANGE
Thermal Calibration
MUX
PWM
MIN
Tachometer 1
Measurement
PWM
CONFIG
TACH1
CPU FAN SINK
Ramp Control
(Acoustic
Enhancement)
PWM
Generator
PWM2
T MIN
100%
LOCAL =
VRM TEMP
0%
T RANGE
Thermal Calibration
PWM
MIN
Tachometer 2
Measurement
Ramp Control
(Acoustic
Enhancement)
PWM
CONFIG
PWM
Generator
TACH2
PWM3
FRONT CHASSIS
23
T RANGE
1
REMOTE 1 =
AMBIENT TEMP
T MIN
Tachometer 3
0% and 4
Measurement
Figure 55. Mux Configuration Example
TACH3
REAR CHASSIS
STEP 3: T MIN Settings for Thermal Calibration
Channels
T MIN is the temperature at which the fans start to turn on
when using automatic fan control mode. The speed at which
the fan runs at T MIN is programmed later. The T MIN values
chosen are temperature-channel specific, for example, 25 ? C
for ambient channel, 30 ? C for VRM temperature, and 40 ? C
for processor temperature.
T MIN is an 8-bit value, either twos complement or Offset
64, that can be programmed in 1 ? C increments. There is a
T MIN register associated with each temperature
measurement channel: Remote 1, local, and Remote 2
temperature. Once the T MIN value is exceeded, the fan turns
on and runs at the minimum PWM duty cycle. The fan turns
off once the temperature has dropped below T MIN ? T HYST .
To overcome fan inertia, the fan spins up until two valid
TACH rising edges are counted. See the Fan Start-up
Timeout section for more details. In some cases, primarily
for psychoacoustic reasons, it is desirable that the fan never
switch off below T MIN . When set, Bits <7:5> of the
Enhanced Acoustics Register 1 (0x62) keep the fans
running at the PWM minimum duty cycle if the temperature
falls below T MIN .
T MIN Registers
Register 0x67, Remote 1 temperature T MIN = 0x9A (90 ? C)
Register 0x68, Local temperature T MIN = 0x9A (90 ? C)
Register 0x69, Remote 2 temperature T MIN = 0x9A (90 ? C)
Enhanced Acoustics Register 1 (0x62)
Bit 7 (MIN3) = 0, PWM3 is off (0% PWM duty cycle) when
the temperature is below T MIN – T HYST .
Bit 7 (MIN3) = 1, PWM3 runs at PWM3 minimum duty
cycle when the temperature is below T MIN – T HYST .
Bit 6 (MIN2) = 0, PWM2 is off (0% PWM duty cycle) when
the temperature is below T MIN – T HYST .
http://onsemi.com
36
相关PDF资料 |
PDF描述 |
|---|---|
| ADT7468ZEVB | BOARD EVAL FOR ADT7468 |
| ADT7473ZEVB | BOARD EVALUATION FOR ADT7473 |
| ADT7475EBZEVB | BOARD EVALUATION FOR ADT7475 |
| ADT7476EBZEVB | BOARD EVALUATION FOR ADT7476 |
| ADT7490ZEVB | BOARD EVALUATION FOR ADT7490 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADT7468 | 制造商:AD 制造商全称:Analog Devices 功能描述:dBCool⑩ Remote Thermal Controller and Voltage Monitor |
| ADT7468ARQ | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7468ARQ-REEL | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7468ARQ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7468ARQZ | 功能描述:板上安装温度传感器 RMT THRM CTR VLT MON RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
发布紧急采购，3分钟左右您将得到回复。