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TC665EUN Datasheet

  • TC665EUN

  • SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection

  • 668.44KB

  • 36頁(yè)

  • MICROCHIP   MICROCHIP

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M
Features
鈥?Temperature Proportional Fan Speed for Reduced
Acoustic Noise and Longer Fan Life
鈥?FanSense鈩?Protects against Fan Failure and
Eliminates the Need for 3-wire Fans
鈥?Over Temperature Detection (TC665)
鈥?Efficient PWM Fan Drive
鈥?Provides RPM Data
鈥?2-Wire SMBus鈩?Compatible Interface
鈥?Supports Any Fan Voltage
鈥?Software Controlled Shutdown Mode for "Green"
Systems
鈥?Supports Low Cost NTC/PTC Thermistors
鈥?Space Saving 10-Pin MSOP Package
鈥?Temperature Range: -40擄C to +85潞C
TC664/TC665
Description
The TC664/TC665 devices are PWM mode fan speed
controllers with FanSense technology for use with
brushless DC fans. These devices implement temper-
ature 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
provided by an external thermistor or voltage output
temperature sensor. The PWM output (V
OUT
) is
adjusted between 30% and 100%, based on the volt-
age at V
IN
. The PWM duty cycle can also be pro-
grammed via SMBus to allow fan speed control without
the need for an external thermistor. If V
IN
is not con-
nected, the TC664/TC665 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, a pulse train is present at the
SENSE pin (Pin 8). The TC664/TC665 use these
pulses to calculate the fan revolutions 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 TC664/
TC665 to assert a logic low alert signal (FAULT). The
default threshold value is 500 RPM. Also, if this condi-
tion occurs, FF (bit 0<0>) in the Status Register will also
be set to a 鈥?鈥?
An over-temperature condition is indicated when the
voltage at V
IN
exceeds 2.6 V (typical). The TC664/
TC665 devices indicate this by setting OTF(bit 5<X>) in
the Status Register to a '1'. The TC665 device also
pulls the FAULT line low during an over-temperature
condition.
The TC664/TC665 devices are available in a 10-Pin
MSOP package and consume 150 碌A(chǔ) during opera-
tion. The devices can also enter a low-power shutdown
mode (5 碌A(chǔ), typ.) by setting the appropriate bit in the
Configuration Register. The operating temperature
range for these devices is -40擄C to +85潞C.
SMBus鈩?PWM Fan Speed Controllers With
Fan Fault Detection
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Personal Computers & Servers
LCD Projectors
Datacom & Telecom Equipment
Fan Trays
File Servers
Workstations
General Purpose Fan Speed Control
Package Type
10-Pin MSOP
V
IN
C
F
SCLK
SDA
GND
1
2
3
4
5
TC664
TC665
10 V
DD
9
8
7
6
V
OUT
SENSE
NC
FAULT
SMBus is a trademark of Intel Coporation
錚?/div>
2002 Microchip Technology Inc.
DS21737A-page 1

TC665EUN 產(chǎn)品屬性

  • 100

  • 集成電路 (IC)

  • PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器

  • -

  • 風(fēng)扇控制器，無(wú)刷（BLDC）

  • -

  • 1

  • -

  • -

  • 3 V ~ 5.5 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）

  • 10-MSOP

  • 管件

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