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| 型号： | TC642BEOA |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SOIC-8 |
| 文件页数： | 1/34页 |
| 文件大小： | 683K |
| 代理商： | TC642BEOA |
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2003 Microchip Technology Inc.
DS21756B-page 1
M
TC642B/TC647B
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 TC642B/TC647B
Supply Voltage
- Supports any Fan Voltage
FanSense Fault Detection Circuit Protects
Against Fan Failure and Aids System Testing
Shutdown Mode for "Green" Systems
Supports Low Cost NTC/PTC Thermistors
Over-Temperature Indication (TC642B only)
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 TC642B/TC647B devices are new versions of the
existing TC642/TC647 fan speed controllers. These
devices are switch mode, fan speed controllers that
incorporate a new fan auto-restart function. Tempera-
ture-proportional speed control is accomplished 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. Minimum fan
speed is set by a simple resistor divider on the VMIN
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 VMIN (pin 3) causes fan shutdown.
The TC642B and TC647B 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 TC642B/
TC647B device to turn the VOUT output on full (100%
duty cycle). If the 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 is also asserted if the
PWM reaches 100% duty cycle (TC642B only), indicat-
ing that maximum cooling capability has been reached
and a possible overheating condition exists.
The TC642B and TC647B devices are available 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
VMIN
GND
FAULT
TC642B
TC647B
PWM Fan Speed Controllers With Minimum Fan Speed,
Fan Restart and FanSense Technology for Fault Detection
相关PDF资料 |
PDF描述 |
|---|---|
| TC647EOATR | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC647VUATR | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC647VOART | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC648EOA | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| TC648VOA | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC642BEOA713 | 功能描述:马达/运动/点火控制器和驱动器 w/Rstrt & Flt Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TC642BEOAG | 制造商:Microchip Technology 功能描述:Fan Control Demo Board |
| TC642BEOATR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controllers With Minimum Fan Speed, Fan Restart and FanSense⑩ Technology for Fault Detection |
| TC642BEPA | 功能描述:马达/运动/点火控制器和驱动器 w/Rstrt & Flt Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TC642BEPA713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controllers With Minimum Fan Speed, Fan Restart and FanSense⑩ Technology for Fault Detection |
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