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參數(shù)資料
| 型號(hào)： | TC647VOART |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 117K |
| 代理商： | TC647VOART |
3
TC647-2
12/05/00
TC647
PWM Fan Speed Controller with FanSense*
2001 Microchip Technology Inc.
DS21447A
Pin No.
1VIN
Analog input. The thermistor network (or other temperature sensor) connects to this input. A
voltage range of 1.25V to 2.65V (typical) on this pin drives an active duty cycle of 0% to
100% on the VOUT pin.
2CF
Analog output. Positive terminal for the PWM ramp generator timing capacitor. The recom-
mended CF is 1
F for 30Hz PWM operation.
3VMIN
Analog input. An external resistor divider connected to this input sets the minimum fan
speed by fixing the minimum PWM duty cycle (1.25V to 2.65V = 0% to 100%, typical). The
TC647 enters Shutdown mode when 0
≤ VMIN ≤ VSHDN. During Shutdown, the FAULT output
is inactive, and supply current falls to 25
A (typical). The TC647 exits Shutdown mode when
VMIN
≥ VREL. See Applications section for more details(FanSense).
4
GND
Ground Terminal.
5
SENSE
Analog input. Pulses are detected at this pin as fan rotation chops the current through a
sense resistor. The absence of pulses indicates a fault.
6
FAULT
Digital (open collector) output. This line goes low to indicate a fault condition. When FAULT
goes low due to a fan fault, the device is latched in Shutdown Mode until deliberately
cleared or until power is cycled. FAULT may be connected to VMIN if a hard shutdown is
desired.
7VOUT
Digital output. This active high complimentary output connects to the base of an external
NPN motor drive transistor. This output has asymmetrical drive. - See Electrical Characteris-
tics section.
8VDD
Power Supply Input. May be independent of fan power supply. See Electrical Characteristics
section.
ELECTRICAL CHARACTERISTICS (Cont.):TMIN < TA < TMAX, VDD = 3.0V to 5.5V, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
Fault Output
VOL
Output Low Voltage
IOH = 2.5mA
—
0.3
V
tMP
Missing Pulse Detector Timeout
—
32/F
—
Sec
tSTARTUP
Start-up Time
—
32/F
—
Sec
TDIAG
Diagnostic Timer Period
—
3/F
—
Sec
Note: 1. Ensured by design, not tested.
PIN DESCRIPTION
(PDIP/SOIC)
Symbol
Description
DETAILED DESCRIPTION
PWM
The PWM circuit consists of a ramp generator and
threshold detector. The frequency of the PWM is determined
by the value of the capacitor connected to the CF input. A
frequency of 30Hz is recommended (CF = 1
F). The PWM
is also the timebase for the Start-up and Fault Timer (see
below). The PWM voltage control range is 1.25V to 2.65V
(typical) for 0% to 100% output duty cycle.
VOUT Output
The VOUT pin is designed to drive a low-cost transistor
or MOSFET as the low side power switching element in the
system. Various examples of driver circuits will be shown
below. This output has asymmetric complementary drive
and is optimized for driving NPN transistors or N-channel
MOSFET’s. Since the system relies on PWM rather than
linear power control, the dissipation in the power switch is
kept to a minimum. Generally, very small devices (TO-92
or SOT package) will suffice.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC647VOATR | 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 |
| TC647VPA | 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 |
| TC647VUA | 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 |
| TC647VUATR | 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 |
| TC648 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Fan Speed Controller with Auto-Shutdown and Over-Temperature Alert |
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