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Ordering number : ENA0600
LA6579H
Monolithic Linear IC
For CD-R
Four-Channel Bridge (BTL) Driver
Overview
The LA6579H is a 4-channel bridge (BTL) driver for CD-R.
Functions
Bridge-connected (BTL) power amplifier incorporating four channels
IO max 1A
Level shift circuit incorporated
MUTE circuit (all circuits ON/OFF)
High output voltage (dynamic range) (6.5V : TYP, CH1 only)
Input OP-AMP incorporated (CH1 only)
Input OP-AMP (CH1) selector function incorporated
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Supply voltage
Allowable power dissipation
Maximum input voltage
Maximum output current
MUTE pin voltage
Operating temperature
Storage temperature
Symbol
VCC max
VCC_P*
Pd max
VINB
IO max
VMUTE
Topr
Tstg
Conditions
*1
VCCP1, VCCP2 *1
Independent IC
Specified board
Each output
* Specified board size : 114.3×76.1×1.6mm3, glass epoxy.
*1 Note : Connect power pins of VCC_S, VCC_P1 and VCC_P2 externally.
Recommended Operating Conditions at Ta = 25°C
Parameter
Supply voltage
Symbol
VCC
Conditions
Ratings
14
14
0.8
1.8
13
1
13
-30 to +85
-55 to +150
Unit
V
V
W
W
V
A
V
°C
°C
Ratings
5 to 13
Unit
V
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor assumes no responsibility for equipment failures that result from using products
at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor
products described or contained herein.
D1306 MS PC B8-6145 No.A0600-1/8

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LA6579H
Electrical Characteristics at Ta = 25°C, VCC_S = VCC_P1 = VCC_P2 = 8V, VREF = 1.65V, MUTE = 3.3V
unless especially specified.
Parameter
Symbol
Conditions
Ratings
min typ
ALL Blocks
No-load current drain ON 1
No-load current drain ON 2
MUTE ON voltage
ICC-ON
ICC-OFF
VMUTE-ON
All outputs ON, MUTE:HI
All channels ON, MUTE:LOW
MUTE *1
30
5
2
MUTE OFF voltage
VMUTE-OFF MUTE *1
Output AMP Block (BTL-AMP) (CH1)
Input AMP offset voltage
Output voltage
Input and output gain
VOFF_OP-AMP
VO1
VG1
CH1, input OP-AMP_A and B
RL=8Ω *2
*3
-50
6.2 6.5
5.4 6
Slew rate
Input OP_AMP
SR1
AMP Independent
Multiply 2 between outputs. *3
0.5
Output offset voltage
OP-AMP_SINK
VOFF1
OP_SINK
Input OP-AMP_A and B
Input OP-AMP, SINK current
-10
2
OP-AMP_SOURCE
OP_SOURCE Input OP-AMP, SOUECE current
300 500
[Input OP_AMP changeover]
Input AMP changeover voltage 1
Input AMP changeover voltage 2
Output AMP (CH2 to 4)
VIN1-SW
VIN1-SW
Select CH1, input OP-AMP_B *5
Select CH1, input OP-AMP_B *5
1
2
Output offset voltage
Output voltage
Input and output gain
VOFF2
VO2
VG2
Between + and – outputs of each CH
Between each plus and minus outputs *2
*3
-50
5 5.4
5.4 6
Slew rate
3.3V power supply
SR2
AMP Independent
Multiply 2 between outputs. *3
0.5
3.3 VREG output voltage
REG-IN SINK current
3.3VREG
REG-IN-SINK
IO = 200mA
Base current of external PNP transistor
3.18
5
3.3
10
Line regulation
Load regulation
ΔVOLN
ΔVOLD
6V VCC 12V, IO = 200mA
5mA IO 200mA
20
50
Note *1 : MUTE output ON with HI and OFF with LOW (AMP output OFF with HI impedance). Operative for all channels.
*2 : Voltage at both ends of an 8Ω load inserted between outputs. H or L for input. Output in the saturation condition.
*3 : CH1 input OP_AMP at 0dB (BUFFER)
*4 : Design guarantee value
*5 : OP-AMP_A is operated when VIN_SW is H. OP-AMP_B is operated when it is L.
Unit
max
45 mA
10 mA
V
0.5 V
50 mV
V
6.6 Times
V/μs
10 mV
mA
μA
0.5 V
V
50 mV
V
6.6 Times
V/μs
3.42
150
200
V
mA
mV
mV
Package Dimensions
unit : mm (typ)
3234B
15.2
(6.2)
28 15
Pd max -- Ta
2.5
Specified board : 114.3×76.1×1.6mm3
glass epoxy
2
When mounted on a board
1.80
1.5
1
(0.8)
0.8
2.0
14
0.3
0.25
2.7
SANYO : HSOP28HC(375mil)
1
Independent IC
0.80
0.5
0.94
0.42
0
--30 --20
0 20 40 60 80
Ambient temperature, Ta – °C
100
No.A0600-2/8

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Block Diagram
LA6579H
VIN1-A 1
VIN1+A 2
VCCP1 3
VO1+ 4
VO1- 5
VO2+ 6
VO2- 7
VIN1_SW
[H] : OP-AMP_A
[L] : OP-AMP_B
[H]
[L]
28 VIN1
27 VIN1-B
33kΩ
11kΩ
Signal system
power supply
All output ON/OFF
H : ON
L : OFF MUTE
26 VIN1+B
25 S-GND
24 VIN1-SW
23 MUTE
22 VREFIN
Power system
FR FR
GND
Power system
GND
FR FR
VO3+ 8
VO3- 9
VO4+ 10
VO4- 11
VCCP2 12
VIN4 13
11kΩ
33kΩ
VIN4G 14
Signal system
power supply
3.3VREG
(External PNP Tr)
21 VCCS
20 3.3VREG
19 REGIN
33kΩ
33kΩ
18 VIN2G
11kΩ
17 VIN2
16 VIN3G
11kΩ
15 VIN3
No.A0600-3/8

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LA6579H
Pin Functions
Pin No.
Symbol
Pin descriptions
1
VIN1-A
CH1 input AMP_A inverted input
2
VIN1+A
CH1 input AMP_A non-inverted input
3
VCCP1
CH1 and CH2 power stage power supply
4
VO1+
Output pin (+) for channel 1
5
VO1-
CH1 Output pin (-) for channel 1
6
VO2+
Output pin (+) for channel 2
7
VO2-
Output pin (-) for channel 2
8
VO3+
Output pin (+) for channel 3
9
VO3-
Output pin (-) for channel 3
10
VO4+
Output pin (+) for channel 4
11
VO4-
Output pin (-) for channel 4
12
VCCP2
CH3 and CH4 power stage power supply
13
VIN4
Input pin for channel 4
14
VIN4G
Input pin for channel 4 (for gain adjustment)
15
VIN3
Input pin for channel 3
16
VIN3G
Input pin for channel 3 (for gain adjustment)
17
VIN2
Input pin for channel 2
18
VIN2G
Input pin for channel 2 (for gain adjustment)
19
REGIN
External PNP transistor, base connection
20
3.3VREG
3.3VREG output pin, external PNP transistor, collector connection
21
VCCS
Signal system GND
22
VREFIN
Reference voltage application pin
23
MUTE
Output ON/OFF pin
24
VIN1_SW
CH1 input OP_AMP changeover pin
25
S_GND
Signal system GND
26
VIN1+B
CH1 AMP_B non-inverted input pin
27
VIN1-B
CH1 AMP_B inverted input pin
28
VIN1
CH1 input pin, input OP_AMP output pin
Note : The center frame (FR) becomes GND (P-GND) for the power system. Keep this at the minimum potential together with the signal GND (S-GND).
Short-circuit VCC_S (signal system power supply), VCCP1, and VCCP2 (output stage power supply) externally.
No.A0600-4/8

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LA6579H
MUTE, VREF-SW
Relation of MUTE and VREF-SW
MUTE
CH1
Output
CH2
CH3
H ON
L OFF
*1 Output to be HI impedance with output OFF.
*2 MUTE operative for all channels.
CH4
VIN1_SW and CH1 input OP_AMP
VIN1_SW
CH1 input OP_AMP
H AMP_A
L AMP_B
Internal reference voltage
(2.5V (TYP))
VIN1-B
0.5V
External reference voltage
VIN1-A
VIN1-SW
2V
On MUTE
MUTE
L
H
Output AMP
OFF
ON
Outline of inputs and outputs
VIN*
VIN-
VIN+
VREF-IN
11kΩ
11kΩ
66kΩ
22kΩ
66kΩ
22kΩ
VO1+
VO1-
Input OP_AMP to be applied to CH1 only
No.A0600-5/8