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System Motor Driver IC for CD and MD Players
System Motor Driver IC for CD and MD Players
LV8222W
LV8222W
Overview
The LV8222W is a system motor driver IC that integrates, on a single chip, all the motor driver circuits required
by CD and MD players. Since this IC provide both a 3-phase PWM spindle motor driver and sled, focus, and
tracking drivers (3 PWM H-bridge driver channels), it can contribute to end product motor system miniaturization,
thinner form factors, and reduced power consumption.
Since the spindle motor driver adopts a direct PWM sensorless drive technique, it provides high-efficiency motor
drive with a minimal number of external components.
Functions and Features
Direct PWM drive
Three-phase full-wave sensorless motor driver (spindle block)
Reverse torque braking (spindle block)
MOS output transistors
Standby mode power saving function
Digital inputs, PWM outputs (spindle, sled, focus, and tracking)
FG output
VS voltage detection function
Current limiter circuit
Thermal protection circuit
Package: SQFP48 (7
7 mm)
Block Diagram
VS1
PGND1
LOGIC
PRE DRIVE
LOGIC
MUTE
1/2VS
VSMON
MON
OSC
SEL
CLK
1/N
V CC
VG
CP1
limiter
CPC1
Charge
VG
pump
CP2
REG
CPC2
33Car Audio
VS3
PGND3
PRE DRIVE
LOGIC
PRE DRIVE
RMAX
VCO
VCO
Phase
1/N
VCOIN
comparator
FIL
Sensorless drive logic
COMIN
Waveform
PRE DRIVE
COM
synthesis
VS
UOUT
VOUT
WOUT
FR
0.19V
System Motor Driver IC for CD and DVD Players
System Motor Driver IC for CD and DVD Players
LV8212T
LV8212T
Overview
The LV8212T is a system motor driver IC that integrates, on a single chip, all the motor driver circuits required
by CD and DVD players. Since this IC provide not only a spindle motor driver, but also sled, focus, and
tracking motor drivers (H-bridge drivers) for a total of 5 driver channels, it can contribute to end product motor
system miniaturization and thinner form factors. Since the spindle motor driver adopts a direct PWM sensorless
drive technique, it provides high-efficiency motor drive with a minimal number of external components.
Functions and Features
Direct PWM drive (low side control)
Three-phase full-wave sensorless motor driver (spindle block)
Soft switching drive (spindle block)
Synchronous commutation drive circuit
Supports switching between reverse torque braking and short-circuit braking (spindle block)
Analog input, PWM output (focus, tracking, sled, and spindle)
Current control adopted in the sled block (channels 4 and 5)
MOS output transistors
Standby mode power saving function
FG output (Two outputs: single Hall device equivalent FG (1FG) and three Hall device equivalent FG
(3FG) outputs)
Current limiter circuit
Thermal protection circuit
Package: TQFP64J (7
Block Diagram
GSW
V CC
GND
1FG
3FG
SUB
7 mm)
OUT5F
OUT5R
RF4
PGND4
OUT4F
VS4
OUT4R
PGND3
OUT3F
VS3
OUT3R
PGND1
OUT2F
OUT2R
OUT1F
VSI
OUT1R
34 Car Audio
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