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)

- CH1,CH2 and CH3 Drive Parts (Focus, Tracking , Sled Drivers)

CH1, CH2 and CH3 drive parts are composed of internal filter, V-I converter and output power amplifiers.

Internal filter

V-I converter

Fig. 4 CH1, CH2 and CH3 drive parts

Output Power AMP

- Internal primary filter

Internal primary filter is composed of sourcing/sinking current source of 22uA and forward/reverse

controlled switches. It converts “FWD/REV” digital signals to analog signal as shown in Fig. 5.

Fig. 5 Output signal waveforms of the primary filter

- V-I converter

V-I converter converts filtered analog voltage signal to positive or negative steering current signals and

delivers them to output power amplifiers.

- Output power amplifier

Output power amplifiers with a unity feedback configuration re-convert the current outputs of V-I

converters to differential output voltage to drive motors in BTL mode.

April. 2002 (Rev.0)

www.interpionsemi.com

-8-

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