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| 型号： | TC652AGVUA |
| 厂商： | Microchip Technology |
| 文件页数： | 5/14页 |
| 文件大小： | 0K |
| 描述： | IC TEMP SNSR/DC FAN CNTRLR 8MSOP |
| 标准包装： | 100 |
| 系列： | FanSense™ |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部 |
| 感应温度： | 25°C，55°C 跳闸点 |
| 精确度： | ±2.5°C（最小值） |
| 拓扑： | ADC，比较器，振荡器，寄存器库 |
| 输出类型： | 低有效 |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 2.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 683 (CN2011-ZH PDF) |
TC652/TC653
3.0
DETAILED DESCRIPTION
TABLE 3-2:
TEMPERATURE RANGE
The TC652/TC653 acquire and convert their junction
temperature (T J ) information from an on-chip solid
DEFINITION FOR TC653
(AUTO-SHUTDOWN MODE)
state sensor with a typical accuracy of ±1°C. The
temperature data is digitally stored in an internal
register. The register is compared with pre-defined
threshold values. The six threshold values are equally
distributed over a pre-defined range of temperatures
(See Table 3-1 and Table 3-2). The TC652/TC653
control the speed of a DC brushless fan using a
fractional speed control scheme. The output stage
requires only a 2N2222-type small-signal BJT for fans
up to 300mA. For larger current fans (up to 1 Amp) a
logic-level N-channel MOSFET may be used. In
addition to controlling the speed of the fan, the TC652/
TC653 include an on-chip over-temperature alarm
(T OVER ) that gives a low-true signal when the
Temperature
(T = T J )
T < T L
T L < = T < T 1
T 1 < = T < T 2
T 2 < =T < T 3
T 3 < =T < T 4
T 4 < = T < T H
T H < = T < T OV
T OV < = T
PWM Duty Cycle
“OFF”
50%
60%
70%
80%
90%
100%
100% with Over-Temp Alert
(T OVER = L)
temperature of the chip exceeds T H by 10°C. This
feature eliminates the need for a separate temperature
sensor for over-temperature monitoring.
In normal fan operation, a pulse-train is present at
SENSE, Pin 5. A Missing Pulse Detector monitors this
Note: The temperature regions defined by the six tempera-
ture thresholds are pre-defined in the TC650/651 by means
of trimming. Once a T L and T H are programmed, the T 1 - T 4
thresholds are automatically equally spaced between T L and
T H .
pin during fan operation (FanSense ? technology). A
stalled, open, or unconnected fan causes the TC652/
TC653 to trigger its Start-up Timer once. If the FAULT
FIGURE 3-1:
FUNCTIONAL BLOCK
DIAGRAM
persists, the FAULT output goes low, and the device is
latched in its Shutdown mode. To release the fan from
shutdown, toggle the SHDN or V DD pin.
V DD
Temperature
Set Point and
T OVER
SHDN
Duty Cycle
Logic
V+
-
TABLE 3-1:
TEMPERATURE RANGE
Trim Range
Control
PWM
DEFINITION FOR TC652
(MINIMUM-SPEED MODE)
AD Converter
Oscillator
Temperature
(T = T J )
T < T L
T L < = T < T 1
T 1 < = T < T 2
PWM Duty Cycle
40%
50%
60%
Temp Sensor
Fan Detect
Logic
+
CMPTR
-
90mV
-
20k
FAULT
T 2 < = T <T 3
T 3 < = T < T 4
T 4 < = T < T H
70%
80%
90%
T H < = T < T OV
100%
3.1
PWM Output
T OV < = T
100% with Over-Temp Alert
(T OVER = L)
The PWM pin is designed to drive a low cost transistor
or MOSFET as the low side power switching element in
the system. This output has an asymmetric
complementary drive and is optimized for driving NPN
transistors or N-channel MOSFETs. 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
packages) will suffice. The frequency of the PWM is
about 15Hz. The PWM is also the time base for the
Start-up Timer (see paragraphs below). The PWM duty
cycle has a range of 40% to 100% for the TC652 and
50% to 100% for the TC653.
2002 Microchip Technology Inc.
DS21453B-page 5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC652AGVUATR | 功能描述:马达/运动/点火控制器和驱动器 W/ Fan Flt & Over T 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 |
| TC652BAVUA | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Integrated Temperature Sensor & Brushless DC Fan Controller |
| TC652BBVUA | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Integrated Temperature Sensor & Brushless DC Fan Controller |
| TC652BCVUA | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Integrated Temperature Sensor & Brushless DC Fan Controller |
| TC652BDVUA | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Integrated Temperature Sensor & Brushless DC Fan Controller |
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