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参数资料
型号： TC642DEMO
厂商： Microchip Technology Inc.
英文描述： PWM Fan Speed Controller with FanSense⑩ Technology
中文描述： 与FanSense PWM风扇速度控制器⑩技术
文件页数： 4/28页
文件大小： 485K
代理商： TC642DEMO
TC642
DS21444C-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.
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
MIN
)
An external resistor divider connected to the V
MIN
input
sets the minimum fan speed by fixing the minimum
PWM duty cycle (1.25V to 2.65V = 0% to 100%, typi-
cal). The TC642 enters shutdown mode when V
MIN
≤
V
SHDN
. During shutdown, the FAULT output is inactive
and supply current falls to 25 μA (typical). The TC642
exits shutdown mode when V
MIN
≥
V
REL
(see
Section 5.0
,
“Typical Applications”).
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. The
absence of pulses indicates a fault.
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. FAULT may be con-
nected to V
MIN
if a hard shutdown is desired. FAULT
will also be asserted when the PWM reaches 100%
duty cycle, indicating that maximum cooling capability
has been reached and a possible over-temperature
condition may occur. This is a non-latching state and
the FAULT output will go high when the PWM duty
cycle goes below 100%.
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 MOS-
FET. 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
Description
1
2
3
4
5
6
7
8
V
IN
C
F
V
MIN
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
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相关代理商/技术参数
参数描述
TC642DEMO 制造商:Microchip Technology Inc 功能描述:Tools Development kit For Use
TC642EOA 功能描述:马达/运动/点火控制器和驱动器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
TC642EOA713 功能描述:马达/运动/点火控制器和驱动器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
TC642EPA 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controller with FanSense⑩ Technology
TC642EUA 功能描述:马达/运动/点火控制器和驱动器 w/Fault Dtct RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
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