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參數(shù)資料
| 型號(hào)： | TC642DEMO |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | PWM Fan Speed Controller with FanSense⑩ Technology |
| 中文描述： | 與FanSense PWM風(fēng)扇速度控制器⑩技術(shù) |
| 文件頁數(shù)： | 9/28頁 |
| 文件大?。?/td> | 485K |
| 代理商： | TC642DEMO |
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2002 Microchip Technology Inc.
DS21444C-page 9
TC642
5.0
TYPICAL APPLICATIONS
Designing with the TC642 involves the following:
(1) The temp sensor network must be configured to
deliver 1.25V to 2.65V on V
IN
for 0% to 100% of the
temperature range to be regulated.
(2) The minimum fan speed (V
MIN
) must be set.
(3) The output drive transistor and associated circuitry
must be selected.
(4) The SENSE network, R
SENSE
and C
SENSE
, must
be designed for maximum efficiency, while
delivering adequate signal amplitude.
(5) If shutdown capability is desired, the drive require-
ments of the external signal or circuit must be
considered.
The TC642 demonstration and prototyping board
(TC642DEMO), and the TC642 Evaluation Kit
(TC642EV), provide working examples of TC642 cir-
cuits and prototyping aids. The TC642DEMO is a
printed circuit board optimized for small size and ease
of inclusion into system prototypes. The TC642EV is a
larger board intended for benchtop development and
analysis. At the very least, anyone contemplating a
design using the TC642 should consult the documen-
tation for both TC642EV (DS21403) and TC642DEMO
(DS21401).
FIGURE 5-1:
Typical Application Circuit.
5.1
Temperature Sensor Design
The temperature signal connected to V
IN
must output a
voltage in the range of 1.25V to 2.65V (typical) for 0%
to 100% of the temperature range of interest. The
circuit in Figure 5-2 illustrates a convenient way to
provide this signal.
Figure 5-2 shows a simple temperature dependent
voltage divider circuit. RT
1
is a conventional NTC ther-
mistor while R
1
and R
2
are standard resistors. The sup-
ply voltage, V
DD
, is divided between R
2
and the parallel
combination of RT
1
and R
1
(for convenience, the paral-
lel combination of RT
1
and R
1
will be referred to as
R
TEMP
). The resistance of the thermistor at various
temperatures is obtained from the manufacturer’s
specifications. Thermistors are often referred to in
terms of their resistance at 25°C.
FAULT
SENSE
NTC
R
1
R
2
R
3
R
4
GND
Thermal
Shutdown
Shutdown
(Optional)
Note:
*See cautions regarding latch-up considerations in Section 5.0, "Typical Applications".
Q
1
+12V
+5V*
V
DD
V
IN
V
MIN
V
OUT
R
BASE
R
SENSE
C
SENSE
C
F
1 μF
C
F
TC642
Fan
C
B
1 μF
C
B
0.01 μF
C
B
0.01 μF
1
8
6
7
5
4
2
3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC642 | PWM Fan Speed Controller with FanSense⑩ Technology |
| TC642EV | PWM Fan Speed Controller with FanSense⑩ Technology |
| TC654EUN | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC655EUN | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
| TC654 | Dual SMBus⑩ PWM Fan Speed Controllers With Fan Fault Detection |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC642DEMO | 制造商:Microchip Technology Inc 功能描述:Tools Development kit For Use |
| TC642EOA | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| TC642EOA713 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| TC642EPA | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSense⑩ Technology |
| TC642EUA | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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