Ordering number : ENN6350
51900RM (OT) No. 6350-1/8
Overview
The LA6557H is a five-channel bridge driver developed
for use in CD and MD players. It provides four BTL
power amplifier channels and one H-bridge power
amplifier channel.
Features and Functions
Four BTL power amplifier channels and one H-bridge
power amplifier channel
I
O
max: 700 mA (each channel)
Built-in level shifter circuits (BTL amplifiers)
One muting circuit (output on/off control) system that
operates for the BTL amplifiers
Thermal shutdown circuit built in
Package Dimensions
unit: mm
3234-HSOP28H-C
6.2
28
15
14
1
0.8
15.3
2.7
0.3
4.9
1.3
10.5
0.65
0.25
0.85
7.9
2.25
2.5max
0.1
SANYO: HSOP28H-C (375mil)
[LA6557H]
LA6557H
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Five-Channel Bridge Driver for MD and CD Players
Monolithic Linear IC
Any and all SANYO 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 representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO 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 products described or contained
herein.
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
CC
max
14
V
Maximum output current
I
O
max
For each channel in channels 1 to 5
0.7
A
Maximum input voltage
V
IN
Bmax
13
V
Mute pin voltage
V
MUTE
13
V
Allowable power dissipation
Pd max
Independent IC
0.82
W
Mounted on the specified printed circuit board
*
2.0
W
Operating temperature
Topr
30 to +85
C
Storage temperature
Tstg
55 to +150
C
Note:
*
Specified printed circuit board: 76.1
114.3
1.6 mm
3
glass-epoxy PCB
Specifications
Maximum Ratings
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
5.6 to 13
V
Operating Conditions
at Ta = 25C
No. 6350-2/8
LA6557H
3.0
2.5
2.0
1.5
1.0
0.82
1.04
0.43
0.5
40
20
0
20
40
60
80
100
0
Pd max -- Ta
Allowable power dissipation, Pdmax -- W
Independent IC
Ambient temperature, Ta --
C
30
Mounted on the specified printed circuit board
(76.1
114.3
1.6 mm
3
glass-epoxy board)
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
No-load current drain: on
I
CC
-ON
All outputs on
*
1
, FWD = REV = 0 V
30
50
mA
No-load current drain: off
I
CC
-OFF
All outputs off
*
1
, FWD = REV = 0 V
10
20
mA
V
REF
input voltage range
V
REF
-IN
1
V
CC
1
V
[BTL Amplifier Block]
Output offset voltage
V
OFF
The voltage difference between outputs for the
50
+50
mV
BTL amplifiers
Input voltage range
V
IN
The input voltage range
0
V
CC
V
Output voltage
V
O
The voltage between V
O
+ and V
O
for each channel
4
5
V
when R
L
= 8
.
*
2
Closed-circuit voltage gain
V
G
Gain from input to output
12
dB
Slew rate
SR
For independent amplifiers. Twice when measured
0.5
V/s
between outputs
*
4
Mute on voltage
V
MUTE
-ON
For each MUTE
*
3
0.5
V
Mute off voltage
V
MUTE
-OFF For each MUTE
*
3
2
V
[H Bridge Block]
Output voltage
V
O
-LOAD
The voltage between V
O
+ and V
O
for each channel
6
V
when R
L
= 8
.
*
2
Low-level input voltage
V
IN
-L
1
V
High-level input voltage
V
IN
-H
2
V
[Regulator Block]
Output voltage
Vreg
I
L
= 100 mA
4.75
5
5.25
V
Output load regulation
V
RL
I
L
= 0 to 200 mA
50
0
10
mV
Supply voltage regulation
VV
CC
V
CC
= 6 to 12 V, I
L
= 100 mA
15
21
60
mV
Electrical Characteristics
at Ta = 25C, V
CC
1 = V
CC
2 = 8 V, V
REF
= 1.65 V
Notes:1. The total current drain for V
CC
1 and V
CC
2 with no load.
2. The voltage across an 8
load. With the output saturated.
3. MUTE: When the MUTE pin is high, the outputs will be on, and when low, off (high impedance)
4. These values are design guarantee values, and are not tested.
No. 6350-3/8
LA6557H
Pin Assignment
MUTE
1
2
3
4
5
15
16
10
11
12
13
14
FR
27
26
22
21
20
19
FR
V
CC
1
V
O
1
V
O
1+
V
O
2+
V
O
2
V
O
4
FWD
REV
V
O
5
V
O
5+
V
O
3+
V
O
4+
V
IN
3
REG-IN
V
CC
-S
6
7
8
9
17
18
23
24
25
28
V
IN
4G
V
IN
4
V
IN
2G
V
IN
3G
V
O
3
V
CC
2
REG-OUT
V
REF
-IN
S-GND
V
IN
2
V
IN
1G
V
IN
1
LA6557H
Top view
No. 6350-4/8
LA6557H
Pin Description
Pin No.
Pin
Function
Equivalent circuit
Channel 3, 4, and 5 power supply (shorted to V
CC
1 and V
CC
-S)
1
V
CC
2
Loading output ()
Loading output (+)
2
3
V
O
5
V
O
5+
VO5-
VO5+
2
3
HM0001
Channel 4 output (+)
Channel 4 output ()
Channel 3 output (+)
Channel 3 output ()
Channel 2 output (+)
Channel 2 output ()
Channel 1 output (+)
Channel 1 output ()
4
5
6
7
8
9
10
11
V
O
4+
V
O
4
V
O
3+
V
O
3
V
O
2+
V
O
2
V
O
1+
V
O
1
OUT
4,5,6,7,
8,9,10,11
HM0002
Channel 1 and 2 (BTL) power supply (shorted to V
CC
-S and
V
CC
2)
12
V
CC
1
Channel 1 input
Channel 2 input
Channel 3 input
Channel 4 input
13
15
17
24
V
IN
1
V
IN
2
V
IN
3
V
IN
4
Channel 1 input (gain adjustment)
Channel 2 input (gain adjustment)
Channel 3 input (gain adjustment)
Channel 4 input (gain adjustment)
14
16
18
23
V
IN
1G
V
IN
2G
V
IN
3G
V
IN
4G
VING
Vref
VIN
21
13
14
(15,17,24)
(16,18,23)
HM0003
Notes: The center frame (FR) functions as the power system ground. It must be, along with S-GND, at the lowest potential in the system.
The power supply pins, V
CC
-S, V
CC
1, and V
CC
2 must be shorted together externally to the IC.
Continued on next page.
No. 6350-5/8
LA6557H
Continued from preceding page.
Pin No.
Pin
Function
Equivalent circuit
Regulator input (base of the external pnp transistor)
19
REG-IN
Regulator output (collector of the external pnp transistor)
20
REG-OUT
Reference voltage input
21
V
REF
-IN
Signal system power supply (shorted to V
CC
1 and V
CC
2)
22
V
CC
-S
Output on/off control for channels 1 to 4 (the BTL amplifiers)
25
MUTE
MUTE
S-GND
100 k
100 k
VCC
25
26
1
(12)
HM0004
Signal system ground
26
S-GND
Channel 5 (VLO) output switching (FWD), logic input to the
loading block
Channel 5 (VLO) output switching (REV), logic input to the
loading block
27
28
FWD
REV
FWD
27
HM0005
Notes: The center frame (FR) functions as the power system ground. It must be, along with S-GND, at the lowest potential in the system.
The power supply pins, V
CC
-S, V
CC
1, and V
CC
2 must be shorted together externally to the IC.
Block Diagram
No. 6350-6/8
LA6557H
1
2
3
4
5
15
16
10
11
12
13
14
FR
27
26
22
21
20
19
FR
6
7
8
9
17
18
23
24
25
28
+
CH2
Mute
CH3
CH1
CH4
CH5
Power supply for
channels 1 and 2
Power supply
for channels
3, 4, and 5
Input
+
Signal system power supply
+
+
+
+
+
22 k
11 k
11 k
11 k
11 k
22 k
22 k
22 k
MUTE
V
CC
1
V
O
1
V
O
1+
V
O
2+
V
O
2
V
O
4
FWD
REV
V
O
5
V
O
5+
V
O
3+
V
O
4+
V
IN
3
REG-IN
V
CC
-S
V
IN
4G
V
IN
4
V
IN
2G
V
IN
3G
V
O
3
V
CC
2
REG-OUT
V
REF
-IN
S-GND
V
IN
2
V
IN
1G
V
IN
1
Output control
Level shifter
Level shifter
Level shifter
Level shifter
Thermal
shutdown circuit
The MUTE pin functions as follows:
High: output on
Low: output off
5 V
REG
(with an external PNP transistor)
Sample Application Circuit
No. 6350-7/8
LA6557H
1
2
3
4
5
6
7
V
CC
2
V
O
5
28
27
26
25
24
23
22
21
20
19
18
17
16
15
8
9
10
11
12
13
14
V
O
5+
V
O
4+
V
O
4
V
O
3+
V
O
3
V
O
2+
V
O
2
V
O
1+
V
O
1
M
M
M
REV
FWD
MUTE
REV
V
CC
1
Loading
motor
Tracking
coil
FWD
S-GND
MUTE
V
IN
4
V
IN
4G
V
CC
-S
Focus
coil
F
R
F
R
Spindle
motor
Sled
motor
VCC
V
REF
-IN
REG-OUT
REG-IN
V
IN
3G
V
IN
3
V
IN
1
V
IN
1G
V
IN
2G
V
IN
2
TRACKING
V
REF
-IN
FOCUS
SPINDLE
SLED
LA6557H
PS No. 6350-8/8
LA6557H
System Diagram
(Relationship between MUTE and the power supplies (V
CC
*))
This catalog provides information as of May, 2000. Specifications and information herein are subject to
change without notice.
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
CH1
CH2
CH3
CH4
V
CC
1
V
CC
2
MUTE
H bridge
Note: * V
CC
1 and V
CC
2 must be connected externally.
Notes: 1. The outputs are in the high-impedance state in
this mode.
2. During braking, the sink side transistor will be
turned on (short braking).
V
LO
+ and V
LO
will be close to the ground level.
H Bridge Block
FWD
REV
V
O
5+
V
O
5
Mode
L
L
OFF
OFF
Open
*
1
L
H
H
L
Forward
H
L
L
H
Reverse
H
H
L
L
Brake
*
2
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