Typical applications, Figure 4. two speed fan speed control, Figure 5. fan high side drive – Rainbow Electronics LM27 User Manual
Page 7: Figure 6. fan low side drive, Lm27
Typical Applications
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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
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FIGURE 5. Fan High Side Drive
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FIGURE 6. Fan Low Side Drive
LM27
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