lm27-2plmda National Semiconductor Corporation, lm27-2plmda Datasheet - Page 7
lm27-2plmda
Manufacturer Part Number
lm27-2plmda
Description
Accurate, 120 C-150 C Factory Preset Thermostat Lm27 Form
Manufacturer
National Semiconductor Corporation
Datasheet
1.LM27-2PLMDA.pdf
(10 pages)
Typical Applications
20153003
Note: The fan's control pin has internal pull-up. The 10k pull-down sets a slow fan speed. When the output of the LM27A goes low, the fan will speed up.
FIGURE 2. Two Speed Fan Speed Control
20153020
FIGURE 3. Fan High Side Drive
20153021
FIGURE 4. Fan Low Side Drive
7
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