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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)： | 17/47頁 |
| 文件大?。?/td> | 547K |
| 代理商： | AMC6821 |
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FAN FAILURE DETECTION
When the TACH data are larger than the TACH low limit, the fan runs at a speed below the predefined minimum
RPM. When this condition occurs, a spin-up process is applied to start the fan again when spin-up is enabled.
Bits [STIME2:STIME0] of the
Fan Characteristics Register
define this time period.
Figure 10
shows the function
of the fan failure detection.
During Spin-Up Process
Normal Operation of Fan Failure
Detection and Spin-Up
Bit FANS = 0
Clear Spin-Up
Time Counter
TACH Data > Low Limit
Measure RPM
Yes
Yes
No
No
No
No
Yes
Yes
No Spin-Up if Disabled
Bit FANS = 1
Spin-Up Time Count +1
Spin-Up Process
Spin-Up Time Count
5
3
Fan failure,
FAN-FAULT
pin
goes low.
Spin-Up Disabled
Measure the RPM continuously once every 0.25s (TACH-FAST
even after a fan failure. However, there are no FANS detections during spin-up.
The
pin is negated if the fan returns to a normal RPM range.
FAN-FAULT
= 1) or 1s
bit
(TACH-FAST = 0),
AMC6821
SBAS386A–MAY 2006–REVISED MAY 2006
The fan speed is measured immediately after spin-up and the TACH-FAST bit of
Configuration Register 4
determines the monitoring rate. If the fan does not return to a normal range after five consecutive spin-ups, a
FAN-FAILURE occurs, the FAN-FAULT pin goes low when it is enabled (the FAN-FAULT-EN bit of
Configuration
Register 1
is set), and the spin-up process continues. If the fan returns to a normal speed range before the fifth
spin-up, the FAN-FAULT pin does not go low even though the FANS bit is still set to '1'. No FANS (fan-slow)
detections are performed during spin-up.
Figure 10. Fan Failure Detection and Spin-Up
17
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相關代理商/技術參數(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/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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| AMC6821SDBQG4 | 功能描述:馬達/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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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