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参数资料
| 型号： | TC654 |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| 中文描述： | 双PWM风扇的SMBus⑩故障检测与风扇转速控制器 |
| 文件页数： | 1/36页 |
| 文件大小： | 706K |
| 代理商： | TC654 |
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2002 Microchip Technology Inc.
DS21734A-page 1
M
TC654/TC655
Features
Temperature Proportional Fan Speed for
Reduced Acoustic Noise and Longer Fan Life
FanSense Protects against Fan Failure and
Eliminates the Need for 3-wire Fans
Over Temperature Detection (TC655)
Efficient PWM Fan Drive
Provides RPM Data
2-Wire SMBus-Compatible Interface
Supports Any Fan Voltage
Software Controlled Shutdown Mode for "Green"
Systems
Supports Low Cost NTC/PTC Thermistors
Space Saving 10-Pin MSOP Package
Temperature Range: -40°C to +85oC
Applications
Personal Computers & Servers
LCD Projectors
Datacom & Telecom Equipment
Fan Trays
File Servers
Workstations
General Purpose Fan Speed Control
Package Type
Description
The TC654 and TC655 are PWM mode fan speed con-
trollers with FanSense technology for use with brush-
less DC fans. These devices implement temperature
proportional fan speed control which lowers acoustic
fan noise and increases fan life. The voltage at V
IN
(Pin 1) represents temperature and is typically pro-
vided by an external thermistor or voltage output tem-
perature sensor. The PWM output (V
OUT
) is adjusted
between 30% and 100%, based on the voltage at V
IN
.
The PWM duty cycle can also be programmed via
SMBus to allow fan speed control without the need for
an external thermistor. If V
IN
is not connected, the
TC654/TC655 will start driving the fan at a default duty
cycle of 39.33%. See Section 4.3, "Fan Startup", for
more details.
In normal fan operation, pulse trains are present at
SENSE1 (Pin 8) and SENSE2 (Pin 7). The TC654/
TC655 use these pulses to calculate the fan revolu-
tions per minute (RPM). The fan RPM data is used to
detect a worn out, stalled, open or unconnected fan.
An RPM level below the user-programmable threshold
causes the TC654/TC655 to assert a logic low alert
signal (FAULT). The default threshold value is
500 RPM. Also, if this condition occurs, F1F (bit 0<0>)
or F2F (bit 1<0>) in the Status Register will also be set
to a ‘
1
’.
An over-temperature condition is indicated when the
voltage at V
IN
exceeds 2.6 V (typical). The TC654/
TC655 devices indicate this by setting OTF(bit 5<X>) in
the Status Register to a '
1
'. The TC655 device also
pulls the FAULT line low during an over-temperature
condition.
The TC654/TC655 devices are available in a 10-Pin
MSOP package and consume 150 μA during opera-
tion. The devices can also enter a low-power shutdown
mode (5 μA, typ.) by setting the appropriate bit in the
Configuration Register. The operating temperature
range for these devices is -40°C to +85oC.
10-Pin MSOP
1
2
3
4
5
10
9
8
7
6
V
IN
C
F
SCLK
SDA
GND
V
DD
V
OUT
SENSE1
SENSE2
FAULT
TC654
TC655
Dual SMBus PWM Fan Speed Controllers With
Fan Fault Detection
SMBus is a trademark of Intel Corporation.
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| TC655 | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC665EUN | SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC664EUN | SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC664 | SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC665 | SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC654EUN | 功能描述:软开关 PWM 控制器 Dual RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| TC654EUNTR | 功能描述:软开关 PWM 控制器 Dual RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| TC655 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC655EUN | 功能描述:软开关 PWM 控制器 Dual RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| TC655EUNTR | 功能描述:软开关 PWM 控制器 Dual RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
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