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| 型号： | TC649BEPA |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDIP8 |
| 封装： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件页数： | 2/36页 |
| 文件大小： | 704K |
| 代理商： | TC649BEPA |
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TC646B/TC648B/TC649B
DS21755B-page 10
2003 Microchip Technology Inc.
3.0
PIN FUNCTIONS
The descriptions of the pins are given in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
3.1
Analog Input (VIN)
The thermistor network (or other temperature sensor)
connects to VIN. A voltage range of 1.20V to 2.60V (typ-
ical) on this pin drives an active duty cycle of 0% to
100% on the VOUT pin. The TC646B, TC648B and
TC649B
devices
enter
shutdown
mode
when
0
≤ VIN ≤ VSHDN. During shutdown, the FAULT/OTF
output is inactive and supply current falls to 30 A
(typical).
3.2
Analog Output (CF)
CF is the positive terminal for the PWM ramp generator
timing capacitor. The recommended value for the CF
capacitor is 1.0 F for 30 Hz PWM operation.
3.3
Analog Input (VAS)
An external resistor divider connected to VAS sets the
auto-shutdown threshold. Auto-shutdown occurs when
VIN < VAS. The fan is automatically restarted when
VIN > (VAS + VHAS). During auto-shutdown, the
FAULT/OTF output is inactive and supply current falls
to 30 A (typical).
3.4
Analog Input (SENSE)
Pulses are detected at SENSE as fan rotation chops
the current through a sense resistor. The absence of
pulses indicates a fan fault condition.
3.5
Digital (Open-Drain) Output
(FAULT/OTF)
FAULT/OTF goes low to indicate a fault condition.
When FAULT goes low due to a fan fault (TC646B and
TC649B devices), the output will remain low until the
fan fault condition has been removed (16 pulses have
been detected at the SENSE pin in a 32/f period). For
the TC646B and TC648B devices, the FAULT/OTF out-
put will also be asserted when the VIN voltage reaches
the VOTF threshold of 2.62V (typical). This gives an
over-temperature/100% fan speed indication.
3.6
Digital Output (VOUT)
VOUT is an active-high complimentary output that
drives the base of an external NPN transistor (via an
appropriate base resistor) or the gate of an N-channel
MOSFET. This output has asymmetrical drive. During a
fan fault condition, the VOUT output is continuously on.
3.7
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.
3.8
Ground (GND)
Ground terminal.
3.9
No Connect (NC)
No internal connection.
Pin
Name
Function
1VIN
Analog Input
2CF
Analog Output
3VAS
Analog Input
4
GND
Ground
5
SENSE/NC
Analog Input/No Connect. NC for TC648B.
6FAULT/OTF
Digital (Open-Drain) Output
OTF for TC648B
7VOUT
Digital Output
8VDD
Power Supply Input
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相关代理商/技术参数 |
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|---|---|
| TC649BEPA713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense⑩ Technology for Fault Detection |
| TC649BEPATR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense⑩ Technology for Fault Detection |
| TC649BEUA | 功能描述:马达/运动/点火控制器和驱动器 w/Rstrt Shtdn & Flt 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 |
| TC649BEUA713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense⑩ Technology for Fault Detection |
| TC649BEUATR | 功能描述:马达/运动/点火控制器和驱动器 w/Rstrt Shtdn & Flt 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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