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National Semiconductor Manuals
Thermostat
LM26 Series
Manual
Typical Applications - National Semiconductor LM26 Series Manual
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Typical Applications
10132303
Note: The fan's control pin has internal pull-up. The 10k pull-down sets a slow fan speed. When the output of the LM26 goes low, the fan will speed up.
FIGURE 4. Two Speed Fan Speed Control
10132320
FIGURE 5. Fan High Side Drive
10132321
FIGURE 6. Fan Low Side Drive
7
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