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LMD18200 Datasheet - Page 7

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Typical Applications
Fixed Off-Time Control This circuit controls the current
through the motor by applying an average voltage equal to
zero to the motor terminals for a fixed period of time when-
ever the current through the motor exceeds the command-
ed current This action causes the motor current to vary
Switching Waveforms
slightly about an externally controlled average level The
duration of the Off-period is adjusted by the resistor and
capacitor combination of the LM555 In this circuit the Sign
Magnitude mode of operation is implemented (see Types of
PWM Signals)
TL H 10568 – 11
7
TL H 10568– 10
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