参数资料
| 型号： | ADT7462ZEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 40/82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 |
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ADT7462
Note on 4-wire Fans
The control range for 4-wire fans is much wider than that
of 2-wire or 3-wire fans. In many cases, 4-wire fans can start
with a PWM drive of as little as 20%.
100
90
80
70
60
50
40
30
20
The T THERM limit should be considered as the maximum
worst-case operating temperature of the system. Because
exceeding any T THERM limit runs all fans at 100%, it has
very negative acoustic effects. Ultimately, this limit should
be set up as a fail-safe, and it must not be exceeded under
normal system operating conditions.
Note that the T THERM limits cannot be masked, and they
affect the fan speed no matter how the automatic fan control
settings are configured. This allows some flexibility because
a T RANGE value can be selected based on its slope, while a
hard limit (such as 70 ? C), can be programmed as T MAX (the
temperature at which the fan reaches full speed) by setting
T THERM to that limit (for example, 70 ? C).
THERM Registers
10
0
0
10
20
30
40
50
60
70
80
90 100
Register 0x4C, Local THERM1 temperature limit = 0xA4
(100 ? C Default)
Register 0x4D, Remote 1 THERM1 temperature limit = 0xA4
100
90
80
70
60
50
40
30
20
10
TEMPERATURE ABOVE T MIN
(100 ? C Default)
Register 0x4E, Remote 2 THERM1 temperature limit = 0xA4
(100 ? C Default)
Register 0x4F Remote 3 THERM1 temperature limit = 0xA4
(100 ? C Default)
Register 0x50, Local THERM2 temperature limit = 0xA4
(100 ? C Default)
Register 0x51, Remote 1 THERM2 temperature limit = 0xA4
(100 ? C Default)
Register 0x52, Remote 2 THERM2 temperature limit = 0xA4
(100 ? C Default)
Register 0x53 Remote 3 THERM2 temperature limit = 0xA4
0
0
10
20
30
40
50
60
70
80
90 100
(100 ? C Default)
TEMPERATURE ABOVE T MIN
Figure 62. T RANGE and % Fan Speed Slopes for VRM,
Ambient, and CPU Temperature Channels
Step 6 ? T THERM for Temperature Channels
T THERM is the absolute maximum temperature allowed
on a temperature channel. Above this temperature, a
component such as the CPU or VRM might be operating
beyond its safe operating limit. When the measured
temperature exceeds T THERM , all fans are driven at 100%
PWM duty cycle (full speed) to provide critical system
cooling. The fans remain running at 100% until the
temperature drops below T THERM minus hysteresis, where
hysteresis is the number programmed into Local/Remote 1
Hysteresis Register 0x54 and Remote 2/Remote 3
Hysteresis Register 0x55. The default hysteresis value is
4 ? C.
Hysteresis Registers
Register 0x54, Local/Remote 1 Temperature Hysteresis
Register
Bits [7:4], Local temperature hysteresis (4 ? C Default)
Bits [3:0], Remote 1 temperature hysteresis (4 ? C Default)
Register 0x55, Remote 2/Remote 3 Temperature
Hysteresis Register
Bits [7:4], Remote 2 temperature hysteresis (4 ? C Default)
Bits [3:0], Remote 3 temperature hysteresis (4 ? C Default)
Because each hysteresis setting is four bits, hysteresis
values are programmable from 1 ? C to 15 ? C. It is not
recommended that hysteresis values ever be programmed to
0 ? C, because this value disables hysteresis. In effect, this
value causes the fans to cycle between normal speed and
100% speed, creating unsettling acoustic noise.
http://onsemi.com
40
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| 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 |
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