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| 型號： | AMC6821 |
| 英文描述： | Analog Monitor and Control Circuit |
| 中文描述： | 模擬監(jiān)視和控制電路 |
| 文件頁數(shù)： | 24/47頁 |
| 文件大小： | 547K |
| 代理商： | AMC6821 |
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P
High Temperature
(Low Temperature)
(100
Value of DCYLOWTEMP Register)
Slope
(3)
Normal Range
DCY-LOW-TEMP
(DCY at Low Temperature,
Default is 33%)
100%
LOW-TEMP (Low Temperature)
H
RPM = 0
Actual Temperature
C
PSV-Temp
(Passive Cooling Temperature)
Low-Temp-Limit
H
Out-of-Range
Out-of-Range
T
Temperature-to-DCY Adjustment Range
DCY increases when the temperature rises.
DCY decreases when the temperature reduces.
0%
D
AMC6821
SBAS386A–MAY 2006–REVISED MAY 2006
The bits [R-TEMP4:R-TEMP0] of the
Remote TEMP-FAN Control Register
and the bits [L-TEMP4:L-TEMP0] of
the
Local TEMP-FAN Control Register
are the low temperature bits that define the low temperature of the control
loops. Bits [SPL2:SPL0] of these registers are the slope bits that define the increment of the duty cycle when the
temprature increases 1
°
C. The bits [RATE2:RATE0] of the
DCY-RAMP Register
(bits [4:1], 0x23) specify the
updating rate of the duty cycle in the temp-fan control mode, and the bits [STEP1:STEP0] define how much the
duty cycle is adjusted by each updating. The high temperature can be calculated by
Equation 3
:
Figure 19. Active Control Temperature—PWM Duty Cycle
When the active control temperature is equal to or below the corresponding low temperature, the duty cycle is
equal to the value of the
DCY-LOW-TEMP Register
and the fan runs at a predefined minimum speed. When the
control temperature is equal to or higher than the corresponding high temperature, the PWM duty cycle is set to
100% and the fan runs at full-speed. When the active control temperature is equal to or below the corresponding
value of the
PSV-Temp Register
(the predefined passive cooling temperature), the fan stops and the PWM duty
cycle is set to 0.
When the actual duty cycle is different from the desired value, the duty cycle is adjusted automatically. When the
RAMPE bit of the
DCY-RAMP Register
is cleared ('0'), the duty cycle changes to the desired value immediately
after being calculated. When the RAMPE bit is '1', the duty cycle changes to the new value gradually.
The
DCY-RAMP Register
specifies how quickly the duty cycle changes. The duty cycle can be checked every
0.0625 of a second to every eight seconds, depending on the bits [RATE2:RATE0] bits. It changes
1/255(0.392%) to 4/255 (1.57%) each time, depending on the bits [STEP1:STEP0] bits. When the difference
between the actual value and the desired value is equal to or less than the adjustment threshold (as defined by
the bits [THRE1:THRE0] bits), the adjustment finishes. See the
DCY-RAMP Register
for details. When the
TACH monitoring is enabled (TACH-EN bit, bit 2 of 0x02, is set to '1') and the TACH-MODE bit (bit 1 of 0x02) is
cleared ('0'), the duty cycle is forced to 0% when the calculated value is less than 7%. If the TACH monitoring is
disabled (TACH-EN = 0) or the TACH-MODE bit is set ('1'), the duty cycle is always set to the calculated value
even if the value is less than 7%.
24
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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:溫度傳感器開發(fā)工具 ANA MONITOR RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:Temperature Sensors and Control ICs 工具用于評估:MSP430G2553 接口類型:USB 工作電源電壓: 工作電源電流: |
| AMC6821EVM-PDK | 功能描述:溫度傳感器開發(fā)工具 THERMAL MGMT RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:Temperature Sensors and Control ICs 工具用于評估:MSP430G2553 接口類型:USB 工作電源電壓: 工作電源電流: |
| AMC6821-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:INTELLIGENT TEMPERATURE MONITOR AND PWM FAN CONTROLLER |
| AMC6821SDBQ | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 Temp Monitoring and Fan Ctrl RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| AMC6821SDBQG4 | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 Temp Monitoring and Fan Ctrl RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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