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LA6565LA6565
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CH1
SGND
VCONT
MUTE234
MUTE1
VIN4
-
VIN4
VREF-IN
VREF-OUT
REG-OUT
REG-OUT
VIN+OP
VIN
-
OP
VIN3
VIN3
-
VIN2
-
VIN2
VIN2+
VO-OP
FWD
REV
VLO
-
VCCP2
VLO+
VO4+
VO4
-
VO3+
VO3
-
VO2+
VO2
-
VO1
-
VCCP1
VCCS
VIN1
-
VIN1+
VIN1
VO1+
CH2,3,4
(V
DD
)
REG
IN
REG
OUT
31 Car Audio 32 Car Audio
LV8280TLV8280T
+
-
+
-
+
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+
RF
WOUT
VCTL
VOUT
UOUT
VS
COM
V
CC
VG
CP1
CPC1
VCREF
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FIL
COMIN
VCO
RMAX
RMIN
VCOIN
FG
BRK
S/S
VCO
OSC
VREF
TSD
Block Diagram Block Diagram
Overview
Functions and Features
Overview
Functions and Features
Five-Channel Driver IC for CD Players/DecksFive-Channel Driver IC for CD Players/Decks
The LA6565 is a 5-channel driver for CD players/decks that features BTL amplifier circuits in four channels
plus a single H-bridge driver circuit.
■ Five power amplifier circuits (bridge connection (BTL connection): 4 channels, H bridge: 1 channel)
■ Iomax: 1 A
■ Built-in level shifter circuits (except for the H-bridge channel)
■ Built-in muting circuits (two systems) mute all outputs (This circuit operates for the BTL
amplifier channels but does not affect H-bridge and the regulator circuit.)
■ Built-in regulator (requires an external pnp transistor and is set with an external resistor)
■ Output voltage setting function (for the loading motor channel)
■ Thermal shutdown circuit
■ Package: HSOP36R (375 mil)
DVD-ROM Spindle Motor Driver IC
The LV8280T is a sensorless motor driver IC that provides a reverse torque braking function and is appropriate
as the spindle motor driver in CD-ROM/DVD players. This IC adopts a direct PWM drive technique and uses a
MOSFET as the output transistor for high-efficiency motor drive.
Since this IC can implement motor drive without the use of a Hall effect device, it can be effective in supporting
motor system miniaturization, thinner form factors, and reduced power consumption.
■ Three-phase full-wave sensorless motor driver
■ Direct PWM drive (low side control)
■ MOSFET output
■ Synchronous commutation
■ Supports switching between reverse torque braking and short-circuit braking
■ Voltage controlled amplifier
■ Analog input, PWM output
■ FG output (Two outputs: single Hall device equivalent FG and three Hall device equivalent FG outputs)
■ Current limiter circuit
■ Thermal protection circuit
■ Standby mode power saving circuit
■ Package: TSSOP30 (275 mil)
DVD-ROM Spindle Motor Driver IC
Input
Thermal shutdown
circuit
Signal system
ground
(Loading motor driver output voltage setting)
Muting
Controls the on/off state of
the corresponding channel.
Output control
High: output on,
low: output off
Level shifterLevel shifterLevel shifterLevel shifter
Power
system
ground
Signal system
power supply
To VREFOUT
To VREFOUT
Power system
ground
Charge
pump
Sensorless
drive logic
Commutation
logic
Phase
comparator
Waveform
synthesis
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