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參數資料
型號: ADM1026JST-REEL
廠商: ANALOG DEVICES INC
元件分類: 電源管理
英文描述: Complete Thermal and System Management Controller
中文描述: 4-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48
封裝: 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026BBC, LQFP-48
文件頁數: 23/56頁
文件大小: 634K
代理商: ADM1026JST-REEL
ADM1026
Rev. A | Page 23 of 56
In all these circuits, the output transistor must have an
I
CMAX
greater than the maximum fan current, and be
capable of dissipating power due to the voltage dropped
across it when the fan is not operating at full speed.
If the fan motor produces a large back EMF when switched
off, it may be necessary to add clamp diodes to protect the
output transistors in the event that the output goes from
full scale to zero very quickly.
Q1
2N2219A
DAC
R1
10k
1/4
LM324
R2
36k
12V
0
Figure 36. Fan Drive Circuit with Op Amp and Emitter-Follower
Q1
BD136
2SA968
DAC
R1
10k
1/4
LM324
R2
39k
R4
1k
R3
1k
12V
0
Figure 37. Fan Drive Circuit with Op Amp and PNP Transistor
Q1
IRF9620
DAC
12V
R1
10k
1/4
LM324
R2
39k
R3
100k
0
Figure 38. Fan Drive Circuit with Op Amp and P-Channel MOSFET
R2
100k
Q1/Q2
MBT3904
DUAL
12V
DAC
R3
39k
R4
10k
Q3
IRF9620
R2
100k
0
Figure 39. Discrete Fan Drive Circuit with P-Channel MOSFET, Single Supply
R2
100k
Q1/Q2
MBT3904
DUAL
+12V
DAC
R3
39k
R4
10k
R1
4.7k
–12V
Q3
IRF9620
0
Figure 40. Discrete Fan Drive Circuit with P-Channel MOSFET, Dual Supply
PWM Output
Fan speed may also be controlled using pulse width modulation
(PWM). The PWM output (Pin 18) produces a pulsed output
with a frequency of approximately 75 Hz and a duty cycle
defined by the contents of the PWM control register (Address
05h). During automatic fan speed control, described below, the
four MSBs of this register set the minimum fan speed.
The open drain PWM output must be amplified and buffered
to drive the fans. The PWM output is intended to be used with
an NMOS driver, but may be inverted by setting Bit 1 of Test
Register 1 (Address 14h) if using PMOS drivers. Figure 41
shows how a fan may be driven under PWM control using an
N-channel MOSFET.
+V
Q1
NDT3055L
PWM
3.3V
10k
TYP
5V OR 12V
FAN
0
Figure 41. PWM Fan Drive Circuit Using an N-Channel MOSFET
相關PDF資料
PDF描述
ADM1026JSTZ-REEL Complete Thermal and System Management Controller
ADM1026JST Circular Connector; No. of Contacts:28; Series:LJT06R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:19; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:19-28
ADM1030ARQ Intelligent Temperature Monitor and PWM Fan Controller
ADM1030 Circular Connector; No. of Contacts:66; Series:LJT06R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:19; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:19-35
ADM1033 Thermal Monitor and Fan Speed (RPM) Controller
相關代理商/技術參數
參數描述
ADM1026JST-REEL7 功能描述:IC CNTRL SYS REF/EEPROM 48LQFP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 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
ADM1026JSTZ 功能描述:PMIC 解決方案 HI INT SYS MONITR IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
ADM1026JSTZ-R7 功能描述:PMIC 解決方案 HI INT SYS MONITR IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
ADM1026JSTZ-REEL 功能描述:板上安裝溫度傳感器 HI INT SYS MONITR 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
ADM1026JSTZ-REEL7 制造商:Analog Devices 功能描述:IC SYSTEM MONITOR 制造商:ON Semiconductor 功能描述:IC SYSTEM MONITOR
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