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| 型号： | ADT7476AARQZ-R |
| 厂商： | ON Semiconductor |
| 文件页数： | 54/66页 |
| 文件大小： | 945K |
| 描述： | IC REMOTE THERMAL CTLR 24QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi QSOP 24ld Pkg (MSL) Change 17/Jun/2010 |
| 标准包装： | 2,500 |
| 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) |
| 其它名称： | ADT7476AARQZ-R-ND ADT7476AARQZ-ROSTR |
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ADT7476A
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54
Table 63. FAN TACH LIMIT REGISTERS (Note 1)
Register Address
R/W
Description
Power-On Default
0x54
R/W
TACH1 Minimum Low Byte
0xFF
0x55
R/W
TACH1 Minimum High Byte/Single-channel
ADC Channel Select
0xFF
0x56
R/W
TACH2 Minimum Low Byte
0xFF
0x57
R/W
TACH2 Minimum High Byte
0xFF
0x58
R/W
TACH3 Minimum Low Byte
0xFF
0x59
R/W
TACH3 Minimum High Byte
0xFF
0x5A
R/W
TACH4 Minimum Low Byte
0xFF
0x5B
R/W
TACH4 Minimum High Byte
0xFF
1. Exceeding any of the TACH limit registers by 1 indicates that the fan is running too slowly or has stalled. The appropriate status bit is set
in Interrupt Status Register 2 to indicate the fan failure. Setting the Configuration Register 1 Lock bit has no effect on these registers.
Table 64. REGISTER 0x55 TACH1 MINIMUM HIGH BYTE (POWER-ON DEFAULT = 0xFF)
Bit No.
Mnemonic
R/W
Description
[4:0]
Reserved
Read-only
When Bit 6 of Configuration 2 Register (0x73) is set (single-channel ADC mode), these bits
are reserved. Otherwise, these bits represent Bits [4:0] of the TACH1 minimum high byte.
[7:5]
SCADC
R/W
When Bit 6 of Configuration 2 Register (0x73) is set (single-channel ADC mode), these bits
are used to select the only channel from which the ADC will take measurements. Otherwise,
these bits represent Bits [7:5] of the TACH1 minimum high byte.
Table 65. PWM CONFIGURATION REGISTERS (Note 1)
Register Address
R/W
Description
Power-On Default
0x5C
R/W
PWM1 Configuration
0x62
0x5D
R/W
PWM2 Configuration
0x62
0x5E
R/W
PWM3 Configuration
0x62
Bit No.
Name
R/W
Description
[2:0]
SPIN
R/W
These bits control the startup timeout for PWMx. The PWM output stays high until two valid
TACH rising edges are seen from the fan. If there is not a valid TACH signal during the fan
TACH measurement directly after the fan startup timeout period, the TACH measurement
reads 0xFFFF and Interrupt Status Register 2 reflects the fan fault. If the TACH minimum
high and low bytes contain 0xFFFF or 0x0000, the Interrupt Status Register 2 bit is not set,
even if the fan has not started.
000 = No Startup Timeout
001 = 100 ms
010 = 250 ms (Default)
011 = 400 ms
100 = 667 ms
101 = 1 sec
110 = 2 sec
111 = 4 sec
[3]
RES
N/A
Reserved. Do not write to this bit.
[4]
INV
R/W
This bit inverts the PWM output. The default is 0, which corresponds to a logic high output for
100% duty cycle. Setting this bit to 1 inverts the PWM output, so 100% duty cycle
corresponds to a logic low output.
[7:5]
BHVR
R/W
These bits assign each fan to a particular temperature sensor for localized cooling.
000 = Remote 1 Temperature Controls PWMx (Automatic Fan Control Mode)
001 = Local Temperature Controls PWMx (Automatic Fan Control Mode)
010 = Remote 2 Temperature Controls PWMx (Automatic Fan Control Mode)
011 = PWMx Runs Full Speed (Default)
100 = PWMx Disabled
101 = Fastest Speed Calculated by Local and Remote 2 Temperature Controls PWMx
110 = Fastest Speed Calculated by All Three Temperature Channel Controls PWMx
111 = Manual Mode. PWM Current Duty Cycle Registers (0x30 to 0x32) Become Writable
1. These registers become read-only when the Configuration Register 1 Lock bit is set to 1. Any subsequent attempts to write to these registers fail.
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| ADT7476AARQZ-REEL | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 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 |
| ADT7476AARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 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 |
| 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 |
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