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| 型号： | ADT7476AARQZ-REEL7 |
| 厂商： | ON Semiconductor |
| 文件页数： | 22/66页 |
| 文件大小： | 945K |
| 描述： | IC REMOTE THERMAL CTRLR 24-QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi |
| 标准包装： | 1,000 |
| 系列： | dBCool® |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 125°C |
| 精确度： | ±2.5% |
| 拓扑： | ADC，比较器，风扇速度计数器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 24-QSOP |
| 包装： | 带卷 (TR) |
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ADT7476A
http://onsemi.com
22
Table 30. INTERRUPT MASK REGISTER 1 (0x74)
Bit
Mnemonic
Description
[7]
OOL
1 masks SMBALERT
for any alert
condition flagged in Interrupt Status
Register 2.
[6]
R2T
1 masks SMBALERT
for Remote 2
temperature.
[5]
LT
1 masks SMBALERT
for Local
temperature.
[4]
R1T
1 masks SMBALERT
for Remote 1
temperature.
[3]
5.0 V
1 masks SMBALERT
for the 5.0 V
channel.
[2]
V
CC
1 masks SMBALERT
for the V
CC
channel.
[1]
V
CCP
1 masks SMBALERT
for the V
CCP
channel.
[0]
2.5 V
1 masks SMBALERT
for the
2.5 V
IN
/THERM
channel.
Table 31. INTERRUPT MASK REGISTER 2 (0x75)
Bit
Mnemonic
Description
[7]
D2
1 masks SMBALERT
for Diode 2 errors.
[6]
D1
1 masks SMBALERT
for Diode 1 errors.
[5]
FAN4
1 masks SMBALERT
for Fan 4 failure.
If the TACH4 pin is being used as the
THERM
input, this bit masks
SMBALERT
for a THERM
event. If the
TACH4 pin is being used as GPIO6,
setting this bit masks interrupts related
to GPIO6.
[4]
FAN3
1 masks SMBALERT
for Fan 3.
[3]
FAN2
1 masks SMBALERT
for Fan 2.
[2]
FAN1
1 masks SMBALERT
for Fan 1.
[1]
OVT
1 masks SMBALERT
for
overtemperature (exceeding THERM
limits).
[0]
12 V/VC
1 masks SMBALERT
for 12 V channel
or for a VID code change, depending on
the function used.
Enabling the SMBALERT
Interrupt Output
The SMBALERT
interrupt function is disabled by
default. Pin 10 or Pin 14 can be reconfigured as an
SMBALERT
output to signal out-of-limit conditions.
Table 32. CONFIGURING PIN 10 AS SMBALERT
OUTPUT
Register
Bit Setting
Configuration Register 3
(0x78)
[1] Pin 10 = SMBALERT
[0] Pin 10 = PWM2
Assigning THERM
Functionality to a Pin
Pin 14 on the ADT7476A has four possible functions:
SMBALERT
, THERM
, GPIO6, and TACH4. The user
chooses the required functionality by setting Bit 0 and Bit 1
of Configuration Register 4 (0x7D).
If THERM
is enabled on Bit 1, Configuration Register 3
(0x78):
?SPAN class="pst ADT7476AARQZ-R_2298076_5"> Pin 22 becomes THERM
.
?SPAN class="pst ADT7476AARQZ-R_2298076_5"> If Pin 14 is configured as THERM
on Bit 0 and Bit 1 of
Configuration Register 4 (0x7D), THERM
is enabled
on this pin.
If THERM
is not enabled:
?SPAN class="pst ADT7476AARQZ-R_2298076_5"> Pin 22 becomes a 2.5 V measurement input.
?SPAN class="pst ADT7476AARQZ-R_2298076_5"> If Pin 14 is configured as THERM
, then THERM
is
disabled on this pin.
Table 33. CONFIGURING PIN 14
Bit 1
Bit 0
Function
0
0
TACH4
0
1
THERM
1
0
SMBALERT
1
1
GPIO6
THERM
as an Input
When THERM
is configured as an input, the user can time
assertions on the THERM
pin. This can be useful for
connecting to the PROCHOT
output of a CPU to gauge
system performance.
When the THERM
pin is driven low externally, the user
can also set up the ADT7476A to run the fans at 100%. The
fans run at 100% for the duration of time that the THERM
pin is pulled low. This is done by setting the BOOST bit
(Bit 2) in Configuration Register 3 (0x78) to 1. This works
only if the fan is already running, for example, in manual
mode, when the current duty cycle is above 0x00, or in
automatic mode when the temperature is above T
MIN
.
If the temperature is below T
MIN
or if the duty cycle in
manual mode is set to 0x00, pulling the THERM
low
externally has no effect. See Figure 31 for more information.
Figure 31. Asserting THERM
Low as an Input in
Automatic Fan Speed Control Mode
THERM
ASSERTED TO LOW AS
AN INPUT: FANS DO NOT GO
TO 100% BECAUSE TEMPERATURE
IS BELOW T
MIN
THERM
ASSERTED TO LOW AS
AN INPUT: FANS GO TO 100%
BECAUSE TEMPERATURE IS
ABOVE T
MIN
AND FANS ARE
ALREADY RUNNING.
T
MIN
THERM
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADT7476AARQZ-RL7 | 功能描述:板上安装温度传感器 MONITORS 5V/4 FANS 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 |
| ADT7476ARQH | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:dBCOOL Remote Thermal Controller and Voltage Monitor |
| ADT7476ARQH-REEL | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:dBCOOL Remote Thermal Controller and Voltage Monitor |
| ADT7476ARQZ | 功能描述:马达/运动/点火控制器和驱动器 MLTCH TDM FAN CTRLR 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 |
| ADT7476ARQZ-R7 | 功能描述:马达/运动/点火控制器和驱动器 MLTICH TDM FAN CTRLR 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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