AD6392 데이터 시트보기 (PDF) - Unspecified

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AD6392

4-CH MOTOR DRIVE IC

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AD6392

4-CH MOTOR DRIVE IC

APPLICATION SUMMARY (Continued)

Input waveform (digital servo output).

(Pin4,5,9,10,19,20)

Output waveform at internal filter(RCIN).

(Pin3,11,18)

Final output waveform.

(Pin1,2,12,13,26,27)

Fig. 6 Operation waveforms of CH1, CH2 and CH3 drive parts

- Operation principle

If FWD is high and REV is low, then SW_FWD and SW_REV become on and off, respectively.

This causes the internal capacitor to be charged with sourcing current of 22 uA and consequently the

voltage of the filter output (RCIN) increases with the internal time constant of 2.4usec (time constant =

R*C=24 pF * 100 Kohm =2.4usec). Then the output current of V-I converter is given by

di= VRCIN

100K

The output voltages of power amplifiers are, then, given as:

DOF = Pref + RCIN

DOR = Pref − RCIN

April. 2002 (Rev.0)

www.interpionsemi.com

-9-

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