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參數資料
| 型號： | TC642EV |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | PWM Fan Speed Controller with FanSense⑩ Technology |
| 中文描述： | 與FanSense PWM風扇速度控制器⑩技術 |
| 文件頁數： | 1/28頁 |
| 文件大小： | 485K |
| 代理商： | TC642EV |
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2002 Microchip Technology Inc.
DS21444C-page 1
M
TC642
Features
Temperature Proportional Fan Speed for Acoustic
Control and Longer Fan Life
Efficient PWM Fan Drive
3.0V to 5.5V Supply Range:
- Fan Voltage Independent of TC642
Supply Voltage
- Supports any Fan Voltage
FanSense
Fault Detection Circuits Protect
Against Fan Failure and Aid System Testing
Shutdown Mode for "Green" Systems
Supports Low Cost NTC/PTC Thermistors
Space Saving 8-Pin MSOP Package
Over-temperature Indication
Applications
Power Supplies
Personal Computers
File Servers
Telecom Equipment
UPSs, Power Amps, etc.
General Purpose Fan Speed Control
Available Tools
Fan Controller Demonstration Board (TC642DEMO)
Fan Controller Evaluation Kit (TC642EV)
Package Types
General Description
The TC642 is a switch mode fan speed controller for
use with brushless DC fans. Temperature proportional
speed control is accomplished using pulse width mod-
ulation (PWM). A thermistor (or other voltage output
temperature sensor) connected to the V
IN
input fur-
nishes the required control voltage of 1.25V to 2.65V
(typical) for 0% to 100% PWM duty cycle. Minimum fan
speed is set by a simple resistor divider on the V
MIN
input. An integrated Start-up Timer ensures reliable
motor start-up at turn-on, coming out of shutdown
mode or following a transient fault. A logic low applied
to V
MIN
(Pin 3) causes fan shutdown.
The TC642 also features Microchip Technology's pro-
prietary FanSense technology for increasing system
reliability. In normal fan operation, a pulse train is
present at SENSE (Pin 5). A missing pulse detector
monitors this pin during fan operation. A stalled, open
or unconnected fan causes the TC642 to trigger its
Start-up Timer once. If the fault persists, the FAULT
output goes low and the device is latched in its shut-
down mode. FAULT is also asserted if the PWM
reaches 100% duty cycle, indicating a possible thermal
runaway situation, although the fan continues to run.
See Section 5.0, “Typical Applications”, for more
information and system design guidelines.
The TC642 is available in the standard 8-pin plastic
DIP, SOIC and MSOP packages and is available in the
commercial, extended commercial and industrial
temperature ranges.
1
8
2
7
3
6
4
5
TC642
GND
CF
V
IN
V
MIN
FAULT
SENSE
V
DD
V
OUT
SOIC/PDIP/MSOP
PWM Fan Speed Controller with FanSense
Technology
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TC642EV | 制造商:Microchip Technology Inc 功能描述:Tools Development kit For Use |
| TC642VOA | 功能描述:馬達/運動/點火控制器和驅動器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產品: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 |
| TC642VOA713 | 功能描述:馬達/運動/點火控制器和驅動器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產品: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 |
| TC642VPA | 功能描述:馬達/運動/點火控制器和驅動器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產品: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 |
| TC642VUA | 功能描述:馬達/運動/點火控制器和驅動器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產品: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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