OM5193H Datasheet, PDF (9/56 Pages) NXP Semiconductors – Disk drive spindle and VCM with servo controller

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PARKVOLT ⁵¹
RPARKVOLT
RVCMCOMPRC
CVCMCOMPRC
REF2V5 40
VCMIN ⁴³
PARK
POWER-DOWN
VCAPY
PRECHARGE
master
ERROR
PRE
DRIVER
RFEEDBACK
12 V
CBRAKEP
BRAKEPOWER ⁴⁸
BRAKEADJH ⁴⁹
BRAKEDELAY 50
RBRAKED
CBRAKED
BRAKE
AFTER
PARK
Ibrake
(to spindle)
TRACKFWSELECT 42
SEEKSELECT 41
RVCMSEEK
DACOUT 34
RVCMTRACKFW
VCM switch
VCM
DAC
SWITCH GND
Vref
(to spindle)
BANDGAP
OM5193H
slave
ERROR
PRE
DRIVER
SENSE
30
ADC[2]/SOUT
54
GNDV
10 CLAMP1
55 CLAMP2
56 CLAMP3
8 SWITCHGATE
62 IVCM
71 GNDVCM1
68 GNDVCM2
63 GNDVCM3
M
69 NIVCM
53 VCMSENSEL
RVCMSENSE
52 VCMSENSEH
MGM975
Fig.4 Block diagram, voice coil motor driver.