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April. 2002 (Rev.0)
www.interpionsemi.com
AD6392
4-CH MOTOR DRIVE IC
- 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.
Fig. 4 CH1, CH2 and CH3 drive parts
- 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.
Internal filter
V-I converter
Output Power AMP
APPLICATION SUMMARY (Continued)