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)： 39/47頁(yè)
文件大小： 547K
代理商： AMC6821
www.ti.com
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AMC6821
SBAS386A–MAY 2006–REVISED MAY 2006
DCY-RAMP Register (Address 0x23, Value After Power-On or Reset = 0x52)
BIT
7
NAME
RAMPE
DEFAULT
0
DESCRIPTION
Ramp Enable Bit. Ignored in software-RPM control.
When RAMPE = 1, Ramp is enabled. The DCY changes to the desired value gradually
according to STEP bits and RATE bits.
When RAMPE = 0, Ramp is disabled. DCY changes to the desired target value immediately.
Default = 0.
Adjustment Step Bits.
STEP1
STEP0
0
0
0
1
1
0
1
1
DCY Updating Rate Bits in Auto Temp-Fan Control Mode.
6
5
STEP1
STEP0
1
0
Max Adjustment
1/256
2/256
4/256 (Default)
8/256
4
3
RATE2
RATE1
1
0
DCY Updates/Sec
(Auto Temp-Fan CTR)
0.0625
0.125
0.25
0.5
1 (Default)
2
4
8
RATE2
0
0
0
0
1
1
1
1
RATE1
0
0
1
1
0
0
1
1
RATE0
0
1
0
1
0
1
0
1
2
RATE0
0
1
0
THRE1
THRE0
1
0
Adjustment Threshold Bits in Auto Temp-Fan Control Mode.
THRE1
0
0
1
1
THRE0
0
1
0
1
Threshold
1/256
2/256
3/256 (Default)
4/256
This register is ignored in the software DCY control mode. This register determines how fast the PWM duty cycle
is adjusted to the desired value when the temperature changes in the automatic temperature-fan control, or
when the fan speed varies from the predetermined value in the software RPM control mode.
RAMPE: Ramp Enable bit.
This bit is ignored in the software RPM control mode.
Adjustment Step Bits: [STEP1:STEP0]
In the software RPM control, these bits specify the amount that duty cycle changes each time.
In the auto fan temperature control mode, these bits are ignored when RAMPE = 0. When RAMPE = 1, these
bits define the maximum amount that the duty cycle can change each time if the duty cycle needs to be
adjusted. For example, if the current value of the duty cycle is 50% and the desired value is 75%, the total
required increment is 25%. If the step is 1/256 (bits [STEP1:STEP0] = '00'), then the duty cycle increases by
1/256 (0.39%) each time the duty cycle is updated, and the duty cycle reaches the desired value (75%) after 64
updates. This takes eight seconds if the update rate is 8/sec (bits [RATE2:RATE0] = '111'), and takes 64
seconds if the update rate is 1/sec. (bits [RATE2:RATE0] = '100'). However, if the step is 2/256, then the time
reduces to half. If the required adjustment is less than the value specified by step bits, the actual required value
is used. For example, if the current duty cycle is 50%, the required value is 73%, and the step is 4/256, a total of
15 updates are needed. The duty cycle increases 21.875% after the first 14 updates, and increases 1.125% in
the last update.
39
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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)品類型:Temperature Sensors and Control ICs 工具用于評(píng)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(kāi)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(píng)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(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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