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參數資料
| 型號： | ADT7460ARQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | dB COOL?? Remote Thermal Controller and Fan Controller |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | 0.025 INCH PITCH, MO-137AB, QSOP-16 |
| 文件頁數： | 27/48頁 |
| 文件大小： | 695K |
| 代理商： | ADT7460ARQ |
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REV. 0
ADT7460
–27–
PWM1 CONFIGURATION (REG. 0x5C)
<2:0> SPIN
These bits control the Start-Up timeout for
PWM1.
000 = No startup timeout
001 = 100 ms
010 = 250 ms (default)
011 = 400 ms
100 = 667 ms
101 = 1 s
110 = 2 s
111 = 4 s
PWM2 CONFIGURATION (REG. 0x5D)
<2:0> SPIN
These bits control the Start-Up timeout for
PWM2.
000 = No startup timeout
001 = 100 ms
010 = 250 ms (default)
011 = 400 ms
100 = 667 ms
101 = 1 s
110 = 2 s
111 = 4 s
PWM3 CONFIGURATION (REG. 0x5E)
<2:0> SPIN
These bits control the Start-Up timeout for
PWM3.
000 = No startup timeout
001 = 100 ms
010 = 250 ms (default)
011 = 400 ms
100 = 667 ms
101 = 1 s
110 = 2 s
111 = 4 s
Disabling Fan Start-Up Timeout
Although Fan Start-Up makes fan spin-ups much quieter than
fixed-time spin-ups, the option exists to use fixed spin-up times.
Bit 5 (FSPDIS) = 1 in Configuration Register 1 (Reg. 0x40)
disables the spin-up for two TACH pulses. Instead, the fan will
spin up for the fixed time as selected in Registers 0x5C–0x5E.
PWM Logic State
The PWM outputs can be programmed high for 100% duty cycle
(noninverted) or low for 100% duty cycle (inverted).
PWM1 Configuration (Reg. 0x5C)
<4> INV
0 = logic high for 100% PWM duty cycle
1 = logic low for 100% PWM duty cycle
PWM2 Configuration (Reg. 0x5D)
<4> INV
0 = logic high for 100% PWM duty cycle
1 = logic low for 100% PWM duty cycle
PWM3 Configuration (Reg. 0x5E)
<4> INV
0 = logic high for 100% PWM duty cycle
1 = logic low for 100% PWM duty cycle
PWM Drive Frequency
The PWM drive frequency can be adjusted for the applica-
tion. Registers 0x5F–0x61 configure the PWM frequency for
PWM1–PWM3, respectively.
PWM1 FREQUENCY REGISTERS (REG. 0x5F–0x61)
<2:0> FREQ
000 = 11.0 Hz
001 = 14.7 Hz
010 = 22.1 Hz
011 = 29.4 Hz
100 = 35.3 Hz (default)
101 = 44.1 Hz
110 = 58.8 Hz
111 = 88.2 Hz
Fan Speed Control
The ADT7460 can control fan speed using two different modes.
The first is Automatic Fan Speed Control Mode. In this mode
fan speed is automatically varied with temperature and without
CPU intervention, once initial parameters are set up. The
advantage of this is in the case of the system hanging, the user is
guaranteed that the system is protected from overheating. The
Automatic Fan Speed Control incorporates a feature called
Dynamic T_min calibration. This feature reduces the design
effort required to program the Automatic Fan Speed Control
Loop. For more information and how to program the Automatic
Fan Speed Control Loop and Dynamic T_min calibration; see
the Automatic Fan Speed Control Loop application note.
The second fan speed control method is Manual Fan Speed
Control which is described in the next paragraph.
Manual Fan Speed Control
The ADT7460 allows the Duty Cycle of any PWM output to be
manually adjusted. This can be useful if you wish to change fan
speed in software or want to adjust PWM duty cycle output for
test purposes. Bits <7:5> of Registers 0x5C–0x5E (PWM Con-
figuration) control the behavior of each PWM output.
PWM CONFIGURATION (REG. 0x5C–0x5E)
<7:5> BHVR
111 = Manual Mode
Once under Manual Control, each PWM output may be manually
updated by writing to registers 0x30–0x32 (PWMx Current
Duty Cycle Registers).
Programming the PWM
Current Duty Cycle Registers
The PWM
Current Duty Cycle Registers are 8-bit registers that
allow the PWM duty cycle for each output to be set anywhere
from 0% (0x00) to 100% (0xFF) in steps of 0.39% (256 steps).
The value to be programmed into the PWM
MIN
register is
given by:
Value decimal
Example 1:
For a PWM duty cycle of 50%,
Value (decimal)
= 50/0.39 = 128 decimal
Value = 128 decimal or 0x80.
Example 2:
For a PWM duty cycle of 33%,
Value (decimal)
= 33/0.39 = 85 decimal
Value = 85 decimal or 0x54.
PWM
MIN
(
)
/0 39
=
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相關代理商/技術參數 |
參數描述 |
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| ADT7460ARQ-REEL | 功能描述:IC SENSOR TEMP FAN-CTRL 16QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝:1 系列:- 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7460ARQ-REEL7 | 功能描述:IC SENSOR TEMP FAN-CTRL 16QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝:1 系列:- 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7460ARQZ | 功能描述:馬達/運動/點火控制器和驅動器 THERMAL MGMT CNTRLR IC RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| ADT7460ARQZ-R7 | 制造商:ON Semiconductor 功能描述:Temp Sensor Digital Serial (3-Wire) 16-Pin QSOP T/R |
| ADT7460ARQZ-REEL | 功能描述:板上安裝溫度傳感器 THERMAL MGMT CNTRLR IC RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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