参数资料
| 型号： | ADT7462ZEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 34/82页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR ADT7462 |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi |
| 标准包装： | 1 |
| 类型： | 温度传感器 |
| 适用于相关产品： | ADT7462 |
| 所含物品： | 评估板 |
| 其它名称： | EVAL-ADT7462EBZ EVAL-ADT7462EBZ-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页当前第34页第35页第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页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页
ADT7462
T RANGE values for a temperature channel and, therefore, for
a given fan, are critical because they define the thermal
characteristics of the system. The thermal validation of the
system is one of the most important steps in the design
process, so these values should be selected carefully.
Figure 51 gives a top-level overview of the automatic fan
control circuitry on the ADT7462. From a systems-level
perspective, up to four system temperatures can be
monitored and used to control four PWM outputs. The four
PWM outputs can be used to control up to eight fans. The
ADT7462 allows the speed of eight fans to be monitored.
The Remote 1 and Remote 2 temperature channels have a
thermal calibration block, allowing the designer to
individually configure the thermal characteristics of those
temperature channels. For example, the CPU fan can be run
when CPU temperature increases above 60 ? C and a chassis
fan can be run when the local temperature increases above
45 ? C. At this stage, the designer has not assigned these
thermal calibration settings to a particular fan drive (PWM)
channel. The right side of Figure 51 shows controls that are
fan-specific. The designer has control over individual
parameters such as minimum PWM duty cycle, fan speed
failure thresholds, and even ramp control of the PWM
outputs. Automatic fan control, then, ultimately allows
graceful fan speed changes that are less perceptible to the
system user.
THERMAL CALIBRATION
100%
PWM
MIN
PWM
CONFIG
RAMP
S
CONTROL
(ACOUSTIC
PWM
GENERATOR
PWM1
ENHANCEMENT)
REMOTE1
TEMP
T MIN T RANGE
THERMAL CALIBRATION
0%
100%
PWM
MIN
TACHOMETER 1
MEASUREMENT
PWM
CONFIG
TACH1
RAMP
MUX
S
CONTROL
(ACOUSTIC
PWM
GENERATOR
PWM2
ENHANCEMENT)
LOCAL
TEMP
T MIN T RANGE
THERMAL CALIBRATION
0%
PWM
MIN
TACHOMETER 2
MEASUREMENT
PWM
CONFIG
TACH2
100%
RAMP
S
CONTROL
(ACOUSTIC
PWM
GENERATOR
PWM3
ENHANCEMENT)
REMOTE2
TEMP
T MIN
T RANGE
0%
TACHOMETER 3
AND 4
MEASUREMENT
TACH3
Figure 51. Automatic Fan Control Block Diagram
Step 1 ? Configuring the MUX
First, the user needs to decide how many temperature
channels are being measured and how many fans need to be
controlled and monitored. When these decisions have been
made, the fans can be assigned to particular temperature
channels. Not only can fans be assigned to individual
channels, but the behavior of the fans is also configurable.
For example, fans can be run under automatic fan control;
they can be run manually (under software control) or they
can be run at the fastest speed calculated by multiple
temperature channels. The MUX is the bridge between
temperature measurement channels and the three PWM
outputs.
Bits [7:5] (BHVR) of Register 0x21, Register 0x22,
Register 0x23, and Register 0x24 (PWM configuration
PWM1, PWM2, PWM3, and PWM4 outputs. The values
selected for these bits determine how the MUX connects a
temperature measurement channel to a PWM output (see
Figure 52).
Automatic Fan Control MUX Options
Bits [7:5] (BHVR), of Register 0x21, Register 0x22,
Register 0x23, and Register 0x24, control the behavior of the
corresponding PWM outputs (see Table 61 and Table 62).
The fastest speed calculated options pertain to controlling
one PWM output based on multiple temperature channels.
The thermal characteristics of the three temperature zones
can be set to drive a single fan. An example is the fan turning
on when the Remote 1 temperature exceeds 60 ? C or when
the local temperature exceeds 45 ? C.
registers) control the behavior of the fans connected to the
http://onsemi.com
34
相关PDF资料 |
PDF描述 |
|---|---|
| ADT7467BBZEVB | BOARD EVALUATION FOR ADT7467 |
| ADT7468ZEVB | BOARD EVAL FOR ADT7468 |
| ADT7473ZEVB | BOARD EVALUATION FOR ADT7473 |
| ADT7475EBZEVB | BOARD EVALUATION FOR ADT7475 |
| ADT7476EBZEVB | BOARD EVALUATION FOR ADT7476 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADT7463 | 制造商:AD 制造商全称:Analog Devices 功能描述:dB COOL Remote Thermal Controller and Voltage Monitor |
| ADT7463ARQ | 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 |
| ADT7463ARQ-REEL | 功能描述:IC SENSOR TEMP FAN-CTRL 24QSOP 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 |
| ADT7463ARQ-REEL7 | 功能描述:IC SENSOR TEMP FAN-CTRL 24QSOP 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 |
| ADT7463ARQZ | 功能描述:马达/运动/点火控制器和驱动器 SYS MGMT CNTRLR IC RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。