參數(shù)資料
型號(hào)： AMC6821
英文描述： Analog Monitor and Control Circuit
中文描述： 模擬監(jiān)視和控制電路
文件頁(yè)數(shù)： 23/47頁(yè)
文件大?。?/td> 547K
代理商： AMC6821
www.ti.com
P
(TACH-DATA Register)
T
-
ACH-SETTING Register)
|Error| > 0x000A
No
Yes
No
Yes
(T
) >
ACH-DATA
(TACH-SETTING)
Increase DCY
by one STEP
Decrease DCY
by one STEP
Measure RPM and adjust DCY once every second (TACH-FAST = 0)
or once every 250ms (T
= 1).
ACH-FAST
+V
Temperature-to-DCY
Adjustment
AMC6821
Actual Temperature
The DCY-RAMP Register
the speed of adjustment.
determines
temperature
PWM Control
Temperature
Channel
AMC6821
SBAS386A–MAY 2006–REVISED MAY 2006
Figure 17. RPM Fan DCY Loop
Auto Temperature Fan Mode
The AMC6821 has two auto temperature fan control modes. When the bits [FDRC1:FDRC0] = [10] (default), the
fan is in the auto remote fan temperature control mode. The temperature reading from the remote temperature
sensor is the active control temperature that controls the PWM duty cycle. When the bits [FDRC1:FDRC0] =
[11], the fan is in the maximum fast-speed calculated control mode.
The local temperature and the remote temperature have independently-programmed control loops with different
parameters. In the maximum fast-speed calculated control mode, the required fan speed is calculated for the
remote and local channels, respectively. Whichever control loop calculates the fastest speed based on the
measured temperature drives the fan. After start-up, the PWM duty cycle is determined by the actual control
temperature. When the temperature is above the low temperature and below the high temperature, the internal
control loop automatically adjusts the duty cycle to a proper value according to the measured temperature.
When the temperature rises, the duty cycle increases to a higher value; when the temperature drops, the duty
cycle reduces. This architecture makes the fan always run at an optimal speed. This adjustment is based on the
control-loop parameters defined in the
Local TEMP-FAN Control Register
,
Remote TEMP-FAN Control Register
,
and the
DCY-RAMP Register
. Changing the parameters changes the desired value of the duty cycle and the fan
speed.
Figure 18. Auto Fan Temperature Loop
23
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AMC6821EVM 功能描述:溫度傳感器開(kāi)發(fā)工具 ANA MONITOR RoHS:否 制造商:Texas Instruments 產(chǎn)品類(lèi)型:Temperature Sensors and Control ICs 工具用于評(píng)估:MSP430G2553 接口類(lèi)型:USB 工作電源電壓: 工作電源電流:
AMC6821EVM-PDK 功能描述:溫度傳感器開(kāi)發(fā)工具 THERMAL MGMT RoHS:否 制造商:Texas Instruments 產(chǎn)品類(lèi)型:Temperature Sensors and Control ICs 工具用于評(píng)估:MSP430G2553 接口類(lèi)型:USB 工作電源電壓: 工作電源電流:
AMC6821-Q1 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:INTELLIGENT TEMPERATURE MONITOR AND PWM FAN CONTROLLER
AMC6821SDBQ 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Temp Monitoring and Fan Ctrl RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
AMC6821SDBQG4 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Temp Monitoring and Fan Ctrl RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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