4-channel Bridge Driver
for CD and CD-ROMs
Overview
The LA6537 is a 4-channel bridge (BTL) driver which was
developed for compact discs and CD-ROMs.
Features and Functions
.
4-channel bridge (BTL) power amplifier.
.
I
O
max 700 mA.
.
With mute circuit (Amp 3, Amp 4).
Package Dimensions
unit : mm
3196-DIP30SLF
[LA6537]
SANYO : DIP30SLF
Specifications
Maximum Ratings
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
14
V
Allowable power dissipation
Pd max
* Mounted on PCB shown below
2.5
W
Maximum input voltage
V
INB
13
V
Mute pin voltage
V
MUTE
13
V
Operating temperature
Topr
20 to +75
C
Storage temperature
Tstg
55 to +150
C
* PCB (114.3
76.2
1.5 mm glass epoxy resin)
Recommended Operating Conditions
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
CC
4 to 13
V
Ordering number: EN 5822
Monolithic Linear IC
LA6537
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
13098HA(II) No.5822-1/4
Electrical Characteristics
at Ta = 25 C, V
CC
= 7.5 V
Parameter
Symbol
Conditions
min
typ
max
Unit
No-load current drain
I
CC
1
Note 1
20
40
60
mA
I
CC
2
Note 2
26
60
mA
Output offset voltage
V
OF
1
Note 3, amplifiers 1 to 2, 7 to 8
50
+50
mV
V
OF
2
Note 3, ampifiers 3 ro 4, 5 to 6
50
+50
mV
Input bias current
I
B
100
500
nA
Buffer input voltage range
V
BIN
1.5
V
CC
-1.5
V
Input voltage range
V
IN
1.0
V
CC
-1.5
V
Output source voltage
V
O
1
Note 4, R
L
= 8.0
5.0
5.6
V
Output sink voltage
V
O
2
Note 5, R
L
= 8.0
1.8
2.4
V
Closed-circuit voltage gain
VG
Bridge amplifier
12
dB
Slew rate
SR
0.15
V/s
Mute on voltage
V
MUTE
2
V
Mute on current
I
MUTE
60
A
Notes:
1.
Mute off and buffer in assume 0.5 V.
2.
Mute off and buffer in assume 1/2 V
CC
V.
3.
Represents the interoutput difference.
4.
Voltage relative to ground (source) when an 8
load is connected between bridge amplifier outputs.
5.
Voltage relative to ground (sink) when an 8
load is connected between bridge amplifier outputs.
Thus, muting is activated when high, and the amplifier outputs 5 and 6 are off.
Test Method
SW No.
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
ICC
1
a
ON
ON
OFF
OFF
b
b
OFF
ON
OFF
OFF
b
OFF
OFF
ICC
2
a
ON
ON
OFF
OFF
b
b
OFF
ON
OFF
OFF
a
OFF
OFF
VOF
1,2
b
ON
ON
OFF
OFF
b
b
OFF
ON
OFF
OFF
b
OFF
OFF
IB
b
OFF
OFF
ON
OFF
a
a
ON
OFF
OFF
OFF
b
OFF
OFF
VO
1
b
OFF
ON
OFF
ON
b
a
OFF
OFF
OFF
ON
b
OFF
OFF
VO
2
b
OFF
OFF
OFF
OFF
a
b
OFF
ON
ON
ON
b
OFF
OFF
VMUTE
b
ON
ON
OFF
OFF
b
b
OFF
ON
OFF
OFF
b
OFF
OFF
IMUTE
b
ON
ON
OFF
OFF
b
b
OFF
ON
OFF
OFF
b
OFF
OFF
VG
b
ON
ON
OFF
OFF
b
b
OFF
ON
OFF
OFF
b
ON
ON
1.
For I
CC
1 and 2, measure the inflow current on the V
CC
pin.
2.
For V
OF
1 and 2, measure the voltage between pins 5 and 6 (amplifiers 1 and 2), pins 25 and 26 (amplifiers 7 and 8), pins 10
and 11 (amplifiers 3 and 4), and pins 20 and 21 (amplifiers 5 and 6).
3.
For I
B
, measure the voltage across the 100 k
resistor (I
B
= V/100 k
).
4.
For V
O
1 and 2, measure each output voltage at input voltages 1.75 V and 5.75 V, respectively.
5.
V
MUTE
is the mute pin (pin 15) voltage when the output goes off.
6.
I
MUTE
is the mute pin (pin 15) inflow current when the output goes off.
7.
For VG, measure the voltage between pins 5 and 6 (amplifiers 1 and 2), pins 25 and 26 (amplifiers 7 and 8), pins 10 and 11
(amplifiers 3 and 4), and pins 20 and 21 (amplifiers 5 and 6) at f = 1 kHz, and use the following formula:
VG = 20 log V
O
/V
IN
dB.
LA6537
No.5822-2/4
Sample Application Circuit
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2
Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
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.
This catalog provides information as of January, 1998. Specifications and information herein are subject to change without notice.
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LA6537
No.5822-4/4
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