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參數資料
| 型號： | TC648BEUA |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁數： | 1/36頁 |
| 文件大?。?/td> | 704K |
| 代理商： | TC648BEUA |
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2003 Microchip Technology Inc.
DS21755B-page 1
M
TC646B/TC648B/TC649B
Features
Temperature-Proportional Fan Speed for Acoustic
Noise Reduction and Longer Fan Life
Efficient PWM Fan Drive
3.0V to 5.5V Supply Range:
- Fan Voltage Independent of TC646B/
TC648B/TC649B Supply Voltage
- Supports any Fan Voltage
FanSense Fault Detection Circuit Protects
Against Fan Failure and Aids System Testing
(TC646B/TC649B)
Automatic Shutdown Mode for “Green” Systems
Supports Low Cost NTC/PTC Thermistors
Over-Temperature Indication (TC646B/TC648B)
Fan Auto-Restart
Space-Saving 8-Pin MSOP Package
Applications
Personal Computers & Servers
LCD Projectors
Datacom & Telecom Equipment
Fan Trays
File Servers
General-Purpose Fan Speed Control
Package Types
Description
The TC646B/TC648B/TC649B devices are new ver-
sions of the existing TC646/TC648/TC649 fan speed
controllers. These devices are switch-mode fan speed
controllers that incorporate a new fan auto-restart func-
tion. Temperature-proportional speed control is accom-
plished using pulse width modulation. A thermistor (or
other voltage output temperature sensor) connected to
the VIN input supplies the required control voltage of
1.20V to 2.60V (typical) for 0% to 100% PWM duty
cycle. The auto-shutdown threshold/temperature is set
by a simple resistor divider on the VAS input. An inte-
grated Start-Up Timer ensures reliable fan motor start-
up at turn-on, coming out of shutdown mode, auto-
shutdown mode or following a transient fault. A logic
low applied to VIN (pin 1) causes fan shutdown.
The TC646B and TC649B also feature Microchip
Technology's proprietary 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 TC646B/
TC649B device to turn the VOUT output on full (100%
duty cycle). If the fan fault persists (a fan current pulse
is not detected within a 32/f period), the FAULT output
goes low. Even with the FAULT output low, the VOUT
output is on full during the fan fault condition in order to
attempt to restart the fan. FAULT (TC646B) or OTF
(TC648B) is also asserted if the PWM reaches 100%
duty cycle, indicating that maximum cooling capability
has been reached and a possible overheating condition
exists.
The TC646B, TC648B and TC649B devices are avail-
able in 8-pin plastic MSOP, SOIC and PDIP packages.
The specified temperature range of these devices is
-40 to +85C.
MSOP, PDIP, SOIC
1
2
3
4
VDD
5
6
7
8
VOUT
SENSE
VIN
CF
VAS
GND
FAULT
TC646B
TC649B
1
2
3
4
VDD
5
6
7
8
VOUT
NC
VIN
CF
VAS
GND
OTF
TC648B
PWM Fan Speed Controllers With Auto-Shutdown, Fan
Restart and FanSense Technology for Fault Detection
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TC648BEUA713 | 功能描述:馬達/運動/點火控制器和驅動器 Shtdn & Over-T Alert 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 |
| TC648BEUATR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense⑩ Technology for Fault Detection |
| TC648E | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Fan Speed Controller with Auto-Shutdown and Over-Temperature Alert |
| TC648EOA | 功能描述:馬達/運動/點火控制器和驅動器 Shtdn & Over-T Alert 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 |
| TC648EOA713 | 功能描述:馬達/運動/點火控制器和驅動器 Shtdn & Over-T Alert 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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