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參數(shù)資料
| 型號(hào)： | AS273D1LPA |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PBCY3 |
| 封裝： | TO-92, 3 PIN |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 84K |
| 代理商： | AS273D1LPA |
9
ASTEC Semiconductor
Typical Detector Applications
Over-Temperature Detector
The AS273 senses the ambient temperature and
turns on its open collector output to indicate an
over-temp condition. Each AS273 can be pro-
grammed to any one of its three over-temp
thresholds by forcing a different range of current
into the reference pin.
Dual Speed Fan Control
The diagram of Figure 12 shows an easy way to
implement smart fan control. When the tempera-
ture is below the over-temp trip point set by R1,
the detectors open collector output is off. There-
fore, the fan speed is controlled by the ratio
between R2 and R3. When the temperature
exceeds the over-temp set point, the open col-
lector is turned on, and fan motor runs at its full
speed.
AS273
Over-Temperature Detector
Figure 11.
Figure 12.
V
CC
R2
R1
V
OUT
REF
OUT
GND
AS273
+12 V
R1
9.1 k
REF
OUT
GND
AS273
R2
10 k
R3
10 k
Q1
M
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相關(guān)代理商/技術(shù)參數(shù) |
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| AS273R2FLF | 制造商:TT Electronics / IRC 功能描述:AS273R2FLF |
| AS273R2HLF | 制造商:TT Electronics / IRC 功能描述:AS273R2HLF |
| AS273R2JLF | 制造商:TT Electronics / IRC 功能描述:AS273R2JLF |
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