参数资料
型号: TC655EUN
元件分类: 运动控制电子
英文描述: BRUSHLESS DC MOTOR CONTROLLER, PDSO10
封装: PLASTIC, MSOP-10
文件页数: 35/36页
文件大小: 706K
代理商: TC655EUN
TC654/TC655
DS21734A-page 8
2002 Microchip Technology Inc.
3.0
PIN FUNCTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
3.1
Analog Input (VIN)
A voltage range of 1.62 V to 2.6 V (typical) on this pin
drives an active duty-cycle of 30% to 100% on the
VOUT pin.
3.2
Analog Output (CF)
Positive terminal for the PWM ramp generator timing
capacitor. The recommended CF is 1 F for 30 Hz
PWM operation.
3.3
SMBus Serial Clock Input (SCLK)
Clocks data into and out of the TC654/TC655. See
Section 5.0 for more information on the serial interface.
3.4
Serial Data (Bi-directional) (SDA)
Serial data is transferred on the SMBus in both direc-
tions using this pin. See Section 5.0 for more informa-
tion on the serial interface.
3.5
Digital (Open Drain) Output
(FAULT)
When the fan’s RPM falls below the user-set RPM
threshold (or OTF occurs with TC655), a logic low sig-
nal is asserted.
3.6
Analog Input (SENSE2)
Fan current pulses are detected at this pin. These
pulses are counted and used in the calculation of the
fan2 RPM.
3.7
Analog Input (SENSE1)
Fan current pulses are detected at this pin. These
pulses are counted and used in the calculation of the
fan1 RPM.
3.8
Digital Output (VOUT)
This active high complimentary output drives the base
of an external transistor or the gate of a MOSFET.
3.9
Power Supply Input (VDD)
The VDD pin with respect to GND provides power to the
device. This bias supply voltage may be independent of
the fan power supply.
Name
Function
VIN
Analog Input
CF
Analog Output
SCLK
Serial Clock Input
SDA
Serial Data In/Out (Open Drain)
GND
Ground
FAULT
Digital (Open Drain) Output
SENSE2
Analog Input
SENSE1
Analog Input
VOUT
Digital Output
VDD
Power Supply Input
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