參數(shù)資料
型號(hào): TC649VPA
廠商: Microchip Technology Inc.
英文描述: CAPACITOR, CLASS Y2 150NFCAPACITOR, CLASS Y2 150NF; Capacitance:150nF; Voltage rating, AC:250V; Voltage rating, DC:2500V; Capacitor dielectric type:Polypropylene; Series:B81122; Tolerance, +:20%; Tolerance, -:20%; Temp, op.
中文描述: PWM風(fēng)扇帶自動(dòng)調(diào)速器關(guān)斷和FanSense⑩技術(shù)
文件頁數(shù): 4/28頁
文件大小: 478K
代理商: TC649VPA
TC649
DS21449C-page 4
2002 Microchip Technology Inc.
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
2.1
Analog Input (V
IN
)
The thermistor network (or other temperature sensor)
connects to the V
IN
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 V
OUT
pin. The TC649 enters shut-
down mode when V
IN
V
SHDN.
During shutdown, the
FAULT output is inactive, and supply current falls to
25 μA (typical). The TC649 exits shutdown mode when
V
IN
V
REL
.
See Section 5.0, “Typical Applications”, for
details.
2.2
Analog Output (C
F
)
C
F
is the positive terminal for the PWM ramp generator
timing capacitor. The recommended C
F
is 1 μF for
30 Hz PWM operation.
2.3
Analog Input (V
AS
)
An external resistor divider connected to the V
AS
input
sets the auto-shutdown threshold. Auto-shutdown
occurs when V
IN
V
AS
. The fan is automatically
restarted when V
IN
(V
AS
+ V
HAS
). See Section 5.0,
“Typical Applications”, for more details.
2.4
Ground (GND)
GND denotes the ground terminal.
2.5
Analog Input (SENSE)
Pulses are detected at the SENSE pin as fan rotation
chops the current through a sense resistor (R
SENSE
).
The absence of pulses indicates a fault. See
Section 5.0, “Typical Applications”, for more details.
2.6
Digital Output (FAULT)
The FAULT line goes low to indicate a fault condition.
When FAULT goes low due to a fan fault condition, the
device is latched in shutdown mode until deliberately
cleared or until power is cycled.
2.7
Digital Output (V
OUT
)
V
OUT
is an active high complimentary output that drives
the base of an external NPN transistor (via an appropri-
ate base resistor) or the gate of an N-channel
MOSFET. This output has asymmetrical drive (see
Section 1.0, “Electrical Characteristics”).
2.8
Power Supply Input (V
DD
)
V
DD
may be independent of the fan’s power supply
(see Section 1.0, “Electrical Characteristics”).
Pin No.
Symbol
Descriptiion
1
2
3
4
5
6
7
8
V
IN
C
F
V
AS
GND
SENSE
FAULT
V
OUT
V
DD
Analog Input
Analog Output
Analog Input
Ground Terminal
Analog Input
Digital (Open Collector) Output
Digital Output
Power Supply Input
相關(guān)PDF資料
PDF描述
TC649VUA CAPACITOR, CLASS Y2 22NFCAPACITOR, CLASS Y2 22NF; Capacitance:22nF; Voltage rating, AC:250V; Voltage rating, DC:2500V; Capacitor dielectric type:Polypropylene; Series:B81122; Tolerance, +:20%; Tolerance, -:20%; Temp, op.
TC649 PWM Fan Speed Controller with Auto-Shutdown and FanSense Technology(風(fēng)扇監(jiān)控器帶自動(dòng)關(guān)斷功能)
TC649E PWM Fan Speed Controller with Auto-Shutdown and FanSense⑩ Technology
TC649EPA PWM Fan Speed Controller with Auto-Shutdown and FanSense⑩ Technology
TC649EUA PWM Fan Speed Controller with Auto-Shutdown and FanSense⑩ Technology
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