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.
Monolithic Linear IC
6W 2-Channel, Bridge 19W typ Power Amplifier
Ordering number:ENN750F
LA4440
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
21500TH (KT)/90196RM/33194HO/8064KI/3233KI/O070KI, TS No.7501/13
Package Dimensions
unit:mm
3023A-SIP14H
[LA4440]
SANYO : SIP14H
Features
Built-in 2 channels (dual) enabling use in stereo and bridge
amplifier applications.
Dual : 6W
2 (typ.)
Bridge : 19W (typ.)
Minimun number of external parts required.
Small pop noise at the time of power supply ON/OFF and
good starting balance.
Good ripple rejection : 46dB (typ.)
Good channel separation.
Small residual noise (Rg=0).
Low distortion over a wide range from low frequencies to
high frequencies.
Easy to design radiator fin.
Built-in audio muting function.
Built-in protectors.
a. Thermal protector
b. Overvoltage, surge voltage protector
c. Pin-to-pin short protector
Specifications
Absolute Maximum Ratings
at Ta = 25C
C
C
14
1
13.8
0.6
37.0
30.0
R1.7
11.0
8.0
0.8min
6.0
15.0max
1.99
2.54
1.4
0.4
4.5
2.25
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Recommended Operating Conditions
at Ta = 25C
Tc=75C, See Pd max Ta characteristic
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LA4440
No.7502/13
Operating Characteristics
at Ta = 25C, V
CC
=13.2V, R
L
=4
, f=1kHz, Rg=600
, with 100
100
1.5mm
3
Al fin,
See specified Test Circuit.
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Equivalent Circuit Block Diagram
LA4440
No.7503/13
Sample Application Circuit 1.
Stereo use
Sample Application Circuit 2.
Bridge amplifier 1
LA4440
No.7504/13
Sample Application Circuit 3.
Bridge amplifier 2
Description of External Parts
C1 (C2)
Feedback capacitor : The low cutoff frequency depends on this capacitor.
If the capacitance value is increased, the starting time is delayed.
C3 (C4)
Bootstrap capacitor : If the capacitance value is decreased, the output at low frequencies goes lower.
C5 (C6)
Oscillation preventing capacitor : Polyester film capacitor, being good in temperature characteristic,
frequency characteristic, is used.
The capacitance value can be reduced to 0.047
F depending on the stability of the board.
C7 (C8)
Output capacitor : The low cutoff frequency depends on this capacitor.
At the bridge amplifier mode, the output capacitor is generally connected.
C9
Decoupling capacitor :Used for the ripple filter. Since the rejection effect is saturated at a certain
capacitance value, it is meaningless to increase the capacitance value more than required. This capaci-
tor, being also used for the time constant of the muting circuit, affects the starting time.
R1 (R2)
Filter resistor for preventing oscillation.
R3 (R4)
Resistor for making input signal of inverting amplifier in Voltage Gain Adjust at Bridge Amplifier
Mode (No. 1).
R5
Resistor for adjusting starting time in Voltage Gain Adjust at Bridge Amplifier Mode (No. 2)
C10
Capacitor for preventing oscillation in Voltage Gain Adjust at Bridge Amplifier Mode (No. 2)
C11
Power source capacitor.
R6 (R7)
Used at bridge amplifier mode in order to increase discharge speed and to secure transient stability.
Feaures of IC System and Functions of Remaining Pins
(a) Since the input circuit uses PNP transistors and the input potential is designed to be 0 bias, no input coupling
capacitor is required and direct coupling is available. However, when slider contact noise caused by the variable
resistor presents a problem, connect an capacitor in series with the input.
(b) The open-loop voltage gain is lowered and the negative feedback amount is reduced for stabilization. An increase
in distortion resulted from the reduced negative feedback amount is avoided by use of the built-in unique distor-
tion reduction circuit, and thus distortion is kept at 0.1% (typ.).
(c) A capacitor for oscillation compensation is contained as a means of reducing the number of external parts. The
capacitance value is 35pF which determines high cutoff frequency f
H
(3dB point) of the amplifier (f
H
20kHz).
(d) For preventing the IC from being damaged by a surge applied on the power line, an overvoltage protector is
contained. Overvoltage setting is 25V. It is capable of withstanding up to 50V at giant pulse surge 200ms.
(e) No damege occurs even when power is applied at a state where pins 10, 11, and 12 are short-circuited with solder
bridge, etc.
(f) To minimize the variations in voltage gain, feedback resistor R
NF
is contained and voltage gain (51.5dB) is fixed.
LA4440
No.7505/13
Voltage Gain Adjust at Stereo Mode
R
NF
=50
(typ), R
f
=20k
(typ)
At R
NF
'=0 (recommended VG)
VG=20log (dB)
In case of using R
NF
'
VG=20log (dB)
VG
R
NF
Rf
R
NF
+R
NF
'
Voltage Gain Adjust at Bridge Amplifier Mode (No. 1)
The bridge amplifier configuration is as shown left, in
which ch1 and ch2 operate as noninverting amplifier
and inverting amplifier respectively.
The output of the noninverting amplifier divided by
resistors R3, R4 is applied, as input, to the inverting
amplifier.
Since attenuation (R4/R3) of the non-inverting amplifier
output and amplification factor (R
f
/R4+R
NF
) of the
inverting amplifier are fixed to be the same, signals of
the same level and 180
out of phase with each other
can be obtained at output pins (12) and (10). The total
voltage gain is apparently higher than that of the
noninverting amplifier by 6dB and is approximately
calculated by the following formula.
VG=20log + 6dB
In case of reducing the voltage gain, R
NF
' is connected
to the noninverting amplifier side only and the following
formula is used.
VG=20log + 6dB
VG=20log (dB)
where (R
NF
+R
NF
') << R5
From this formula, it is seen that connecting R
NF
'
causes the voltage gain to be reduced at the modes of
both stereo amplifier and bridge amplifier.
R
f
R
NF
Voltage Gain Adjust at Bridge Amplifier Mode (No. 2)
R
f
R
NF
+R
NF
'
R
f
R
NF
+R
NF
'
2
LA4440
No.7506/13
(g) In case of applying audio muting in each application circuit, the following circuit is used.
6V
V
M
V
CC
Recommended V
M
=9V
A
TT
=40dB (Rg=600
)
Flow-in current I
O
is calculated by the following formula.
I
O
=
In case of increasing the muting attenuation, resistor 5.6k
is connected in series with the input, and then the
attenuation is made to be 55dB. Be careful that connecting an input capacitor causes pop noise to be increased at
the time of application of AC muting. Increased R
O
, C
O
make it possible to reduce the noise. In case of com-
pletely cutting off power IC, pin (5) is grounded, and then DC control is available and the attenuation is made to
be
.
V
M
V
BE
R
O
Stereo
: 20
R
100
Bridge No.1 : 20
R
100
Bridge No. 2 : 0
R
50
Pin Voltage (unit : V)
.
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P
1
2
3
4
5
6
7
8
9
0
1
1
1
2
1
3
1
4
1
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1
H
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F
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2
H
C
F
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2
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2
H
C
S
B
2
H
C
T
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C
1
H
C
T
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1
H
C
S
B
1
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q
4
.
1
3
0
.
0
0
0
0
.
3
1
3
0
.
0
4
.
1
0
9
.
1
1
8
.
6
2
.
3
1
8
.
6
9
.
1
1
0
Proper Cares in Using IC
Maximum ratings
If the IC is used in the vicinity of the maximum ratings, even a slight variation in conditions may cause the maximum
ratings to be exceeded, thereby leading to breakdown. Allow an ample margin of variation for supply voltage, etc. and
use the IC in the range where the maximum ratings are not exceeded.
Printed circuit board
When making the board, refer to the sample printed circuit pattern and be careful that no feedback loop is formed
between input and output.
Oscillation preventing capacitor
Normally, a polyester film capacitor is used for 0.1
F + 4.7
. The capacitance value can be reduced to 0.047
F depend-
ing on the stability of the board.
Others
Connect the radiator fin of the package to GND.
LA4440
No.7507/13
Characteristics at stereo amplifier mode
LA4440
No.7508/13
LA4440
No.7509/13
Characteristics at bridge amplifier mode No. 1
LA4440
No.75010/13
LA4440
No.75011/13
Characteristics at bridge amplifier mode No. 2
LA4440
No.75012/13
Proper Cares in Mounging Radiator Fin
1. The mounting torque is in the range of 39 to 59N cm.
2. The distance between screw holes of the radiator fin must coincide with the distance between screw holes of the IC.
With case outline dimensions L and R referred to, the screws must be tightened with the distance between them as
close to each other as possible.
3. The screw to be used must have a head equivalent to the one of truss machine screw or binder machine screw defined
by JIS. Washers must be also used to protect the IC case.
4. No foreign matter such as cutting particles shall exist between heat sink and radiator fin. When applying grease on the
junction surface, it must be applied uniformly on the whole surface.
5. IC lead pins are soldered to the printed circuit board after the radiator fin is mounted on the IC.
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 expor ted without obtaining the expor t license from the author ities
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.
This catalog provides information as of February, 2000. Specifications and information herein are subject
to change without notice.
LA4440
PS No.75013/13
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