LM27 datasheet(7/9 Pages) NSC

Part #	LM27

Description	SOT-23, 3 Degree Celcious Accurate, 120-150 Degree Celcious Factory Preset Thermostat

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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7 / 9 page

Typical Applications

20030703

Note: The fan’s control pin has internal pull-up. The 10k pull-down sets a slow fan speed. When the output of the LM27 goes low, the fan will speed up.

FIGURE 4. Two Speed Fan Speed Control

20030720

FIGURE 5. Fan High Side Drive

20030721

FIGURE 6. Fan Low Side Drive

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LM27 Datasheet(PDF) 7 Page - National Semiconductor (TI)

LM27 Datasheet(HTML) 7 Page - National Semiconductor (TI)

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