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Five-Channel Driver IC for CD Players/Decks
Five-Channel Driver IC for CD Players/Decks
LA6565
LA6565
Overview
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.
Functions and Features
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)
Block Diagram
1
FWD
Input
2
REV
3
VCCP2
4
VLO-
5
VLO+
6
VO4+
7
VO4-
8
VO3+
9
VO3-
Power
system
ground
RF
10
VO2+
VO2-
11
12
VO1-
13
VO1+
14
VCCP1
Signal system
15
VCCS
power supply
VIN1+
16
11k
+
-
17
VIN1-
VIN1
18
31 Car Audio
Thermal shutdown
Signal system
36
SGND
ground
circuit
(Loading motor driver output voltage setting)
35
VCONT
Muting
Controls the on/off state of
34
MUTE1
the corresponding channel.
CH1
High: output on,
33
low: output off
CH2,3,4
MUTE234
44k
11k
32
-
VIN4-
+
+
-
To VREFOUT
31
VIN4
-
+
30
VREF-IN
29
VREF-OUT
28
REG-OUT
(V DD )
REG
IN
-
+
REG
-
RF
+
OUT
+
27
REG-OUT
-
26
VIN+OP
+
-
25
VIN-OP
24
VO-OP
23
VIN3
44k
11k
-
22
VIN3-
-
+
+
To VREFOUT
44k
21
VIN2
-
+
44k
20
VIN2-
11k
-
-
+
+
19
VIN2+
DVD-ROM Spindle Motor Driver IC
DVD-ROM Spindle Motor Driver IC
LV8280T
LV8280T
Overview
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.
Functions and Features
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)
Block Diagram
VCO
OSC
V CC
+
Phase
comparator
FG
BRK
Sensorless
drive logic
S/S
VREF
TSD
VG
Charge
pump
Waveform
COM
synthesis
VS
+
UOUT
Commutation
logic
VOUT
WOUT
RF
-
-
+
+
+
-
-
+
32 Car Audio
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