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參數(shù)資料
| 型號： | TC649VOART |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 5/17頁 |
| 文件大小： | 119K |
| 代理商： | TC649VOART |
13
TC649-2 12/05/00
TC649
2001 Microchip Technology Inc.
DS21449A
PWM Fan Speed Controller with Auto-Shutdown
Figure 11. Design Example
FAULT
SENSE
NTC
10k
@ 25
°C
R1
75k
R2
1k
R5
33k
R7
1.5k
R6
GND
RESET
SHUTDOWN
(OPTIONAL)
Q1
+12V
+5V
VCC
VIN
VAS
VOUT
RSENSE
2.2
CSENSE
0.1
F
C1
1
F
CF
TC649
FAN
FAULT
CB
0.01
F
CB
0.01
F
CB
1
F
1
8
4
6
7
5
2
3
18K
Open Drain
Device
Step 1. Calculate R1 and R2 based on using an NTC
having a resistance of 4.6k
at TMIN and
1.1k
at TMAX.
R1 = 75k
R2 = 1k
Step 2. Set Auto-Shutdown level
VAS = 1.8V
Limit the divider current to 100
A
R5 = 33
R6 = 18
Step 3. Design the output circuit
Maximum fan motor current = 250mA.
Q1 beta is chosen at 100 from which
R7 = 1.5k
.
TC649 as a Microcontroller Peripheral
(Figure 12)
In a system containing a microcontroller or other host
intelligence, the TC649 can be effectively managed as a
CPU peripheral. Routine fan control functions can be per-
formed by the TC649 without processor intervention. The
micro-controller receives temperature data from one or
more points thoughout the system. It calculates a fan oper-
ating speed based on an algorithm specifically designed for
the application at hand. The processor controls fan speed
using complementary port bits I/O1 through I/O3. Resistors
R1 through R6 (5% tolerance) form a crude 3-bit DAC that
translates this 3-bit code from the processor's outputs into a
1.6V to 2.6V DC control signal. (A monolithic DAC or digital
pot may be used instead of the circuit shown.)
With VAS set at 1.8V, the TC649 enters Auto-Shutdown
when the processor's output code is 000[B]. Output codes
001[B] to 111[B] operate the fan from roughly 40% to 100%
of full speed. An open drain output from the processor (I/O0)
can be used to reset the TC649 following detection of a fault
condition. The FAULT output can be connected to the
processor's interrupt input, or to another I/O pin for polled
operation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC649VOATR | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 Shtdn & 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 |
| TC649VPA | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 Shtdn & 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 |
| TC649VUA | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 Shtdn & 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 |
| TC649VUATR | 功能描述:馬達(dá)/運動/點火控制器和驅(qū)動器 Shtdn & 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 |
| TC6-4A11 | 制造商:FERROXCUBE 制造商全稱:Ferroxcube International Holding B.V. 功能描述:Ferrite toroids |
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