Specifications of any and all SANYO Semiconductor Co.,Ltd. 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
'
sproductsor
equipment.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
41608 MS JK/32896HA(II)/D0192TS/4162TS No.4022-1/8
LA4525
Overview
The LA4525 requires onl y a sm all number of external com ponents t o drive eit her two 4Ω speake rs or one 8Ω speaker. The
output power is typically 0.65W when driving two 4Ω speakers .
Features
• Two-channel (dual) or single-channel (BTL) operation
• Requires only a few external components
• 0.65W (typ) output pow er into two 4Ω speake rs
• Wide power suppl y ra n ge : 3 to 15 V
• 8-pin DIP (No heat sink needed)
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max Rg = 0 15 V
Allowable power dissipation Pd max Note 1.5 W
Operating temperature Topr −25 to +75 °C
Storage temperature Tstg −40 to +150 °C
Note : Mounted on a 50×50×1.6mm3 heat dissipating board
Recommended Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Supply voltage VCC 6 V
Load resistance range RL 4 Ω
Supply voltage range VCC op Not in excess of package Pd 3 to 15 V
Monolithic Linear IC
For Radio Cassette Recorders
Dual AF Power Amplifier
Orderin
g
numbe
r
: EN4022D
LA4525
No. 4022-2/8
Electrical Characteristics at VCC = 6V, Ta = 25°C, RL = 4Ω, f = 1kHz, Rg = 600Ω,
Dual operation unless otherwise noted
Parameter Symbol Condition min typ max Unit
Quiescent supply current ICCO Rg = 0Ω 10 15 30 mA
PO1 THD = 10% 0.45 0.65 W Output power
PO2 VCC = 9V, RL = 8Ω, THD = 10% 1.0 W
Voltage gain VG VO = 0dBm 38 40 42 dB
Total harmonic distortion THD PO = 0.1W 0.2 0.7 %
Output noise voltage VNO Rg = 0Ω, DIN AUDIO filter 100 400 µV
Supply voltage ripple rejection SVRR Rg = 0Ω, fR = 100Hz, VR = 0dBm 35 43 dB
Channel separation CH Sep VO = 0dBm, Rg = 0Ω 45 55 dB
Input resistance Ri 70 100 130 kΩ
Package Dimensions
unit : mm (typ)
3001D
SANYO : DIP8(300mil)
9.14
14
85
1.4
1.0
6.4
7.62
0.25
(3.0)
3.9MAX
0.51MIN
3.2
(0.76) 2.54 0.5
Pd max -- Ta
-20 0 20 40 60 80 160
0
0.4
2.0
JK780601
0.8
1.2
1.6
120 140
100
1.5
1.25
Allowable power dissipation, Pd max -- W
Ambient temperature, Ta -- °C
Mounted on Sanyo
recommended board
Independent IC
LA4525
No. 4022-3/8
Block Diagram
Dual Operation Example
Sample Printed Circuit Pattern
LA4525
No. 4022-4/8
Pin Description
Number Name Description
1 OUT1 Channel 1 output
2 VCC Supply voltage
3 OUT2 Channel 2 output
4 POWER GND Power amplifier ground
5 BTL IN Bridge test load input
6 IN2 Channel 2 input
7 IN1 Channel 1 input
8 PRE GND Preamplifier ground
External Components Comparison
External components Existing
Sanyo ICs LA4525
Output capacitor s c c
Input capacitors c c
Bootstrap capacitor s c ×
Feedback capacitors c ×
Filter capacitors c ×
Oscillation damping mylars c ×
Dual-mode operation total 11 4
Pin Voltages
Pin number Pin name Pin voltage
1 OUT1 2.8V
2 VCC 6V
3 OUT2 2.8V
4 POWER GND 0V
5 BTL IN 65mV
6 IN2 1.4V
7 IN1 1.4V
8 PRE GND 0V
LA4525
No. 4022-5/8
3
5
7
0.1
2
3
5
7
1.0
2
3
JK452508
357
100 23 57
1k 23 57
10k 2
THD -- f
Frequency, f -- Hz
Total harmonic distortion, THD -- %
VCC
=
6V
RL
=
4Ω
PO
=
0.1W
(VO
=
0.632V)
Rg
=
600Ω
2
0
600
0
1.2
500 1.0
400 0.8
300 0.6
200 0.4
100 0.2
JK452509
0.01 23 57
0.1 23 57
1.0
d
ICC,Pd -- PO
Output power, PO -- W
Current drain, ICC -- mA
Power dissipation, Pd -- W
VCC
=
6V
RL
=
4Ω
Rg
=
600Ω
f
=
1kHz
ICC
Pd
0
700
JK452510
100
200
300
400
500
600
2
0.01 23 57
0.1 23 57
1.0 0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
ICC,Pd -- PO
Output power, PO -- W
Current drain, ICC -- mA
ICC
Pd
Power dissipation, Pd -- W
VCC
=
9V
RL
=
8Ω
Rg
=
600Ω
f
=
1kHz
10
0
1.2
JK452511
02 4 6 8
0.2
0.4
0.6
0.8
1.0
PO -- VCC
Supply voltage, VCC -- V
Output power, PO -- W
RL
=
4Ω
8Ω
THD
=
10%
f
=
1kHz
Rg
=
600Ω
100k
-10
2
JK452512
23 57
100 23 57
1k 23 57
10k 23 57
-8
-6
-4
-2
0
f Response
Frequency, f -- Hz
Frequency response -- dB
Dual
VCC
=
6V
RL
=
4Ω
VO
=
0dBm
Rg
=
600Ω
COUT
=
1000µF
VG
=
40dB/1kHz
fH
=
140kHz
470µF
220µF
20
30
40
50
60
70
JK452513
57
100 23 57
1k 23 57
10 k 23
3
CH Sep -- f
Frequency, f -- Hz
Channel separation, CH sep -- dB
VCC
=
6V
RL
=
4Ω
VO
=
0dBm
Rg
=
0
ch2Jch1
ch1Jch2
ch2Jch1
ch1Jch2
2
0
0.2
0.4
0.6
0.8
1.0
JK452514
71k 23 57
10k 23 57
100k
VNO -- Rg
Signal source resistance, Rg -- Ω
Output noise voltage, VNO -- mV
VCC
=
6V
RL
=
4Ω
Rg
=
0J0.1mV
3
10
20
30
40
50
60
JK452515
357
100 23 57
1k 2
SVRR -- fR
Ripple frequency, fR -- Hz
Ripple rejection, SVRR -- dB
VCC
=
6V
RL
=
4Ω
Rg
=
0
VCCR
=
0dBm (775mV)
LA4525
No. 4022-6/8
Rising and falling waveforms
BTL Operation Example
3
7
0.1
2
3
5
7
1.0
2
3
5
7
10
2
3
5
JK452517
23 57
0.1 23 57
1.0 28
0
0.4
0.8
1.2
1.6
2.0
JK452518
0246
THD -- PO
Output power, PO -- W
Total harmonic distortion, THD -- %
BTL
VCC
=
6V
RL
=
8Ω
Rg
=
600Ω
f
=
1kHz
PO -- VCC
Supply voltage, VCC -- V
Output power, PO -- W
BTL
RL
=
8Ω
THD
=
10%
Rg
=
600Ω
f
=
1kHz
LA4525
No. 4022-7/8
2
-10
2
0
-2
-4
-6
-8
JK452519
23 57
100 23 57
1k 23 57
10k 2 3 5 7100k
+
+
f Response
Frequency, f -- Hz
Frequency response -- dB
Co1
Co2
8Ω
BTL
VCC
=
6V
RL
=
8Ω
VO
=
0dBm
Rg
=
600Ω
VG
=
46dB/1kHz
CO1,CO2
470µF
220µF
3
JK452520
0.01 23 57
0.1 23 57
1.0 2
0
600
0
1.2
500 1.0
400 0.8
300 0.6
200 0.4
100 0.2
ICC, Pd -- PO
Output power, PO -- W
Current drain, ICC -- mA
Power dissipation, Pd -- W
ICC
Pd
BTL
Pd
=
VCC×ICC−PO
VCC
=
6V
Rg
=
600Ω
f
=
1kHz
=
1000µF
Handling Instructions and Precautions
Internal Circuits
Figure 1. Input pins (6 and 7) and BTL input pin (5)
Figure 2. Output pins (1 and 3)
External Components
• The starting time, ts, can be varied by changing the value of the input capacitor. A value of 2.2µF is recommended. A
smaller value will result in a lower starting time, and a larger value, a higher starting time.
• The output c apacitor s hould have a value of 470µF. A lower value will cause the low-frequency roll-off and low-power
characteristics to deteriorate.
• A value of 470µF is recommended for the power supply capacitor, although this can change according to the design
setup conditions.
• In dual mode, BTL IN (the channel 2 negative feedback connection) should be left floating.
BTL mode
• The output capacitors should have a value of 470µF. If these are omitted, a ‘‘popping’’ noise occurs. Also, any output
offset will cause a current to flow which could damage the load under quiescent DC conditions.
• The output capacitors can be replaced with a single 220µF bipolar capacitor. A larger value can cause switching noise
when power is applied to the device.
LA4525
PS No. 4022-8/8
SANYO Semiconductor Co.,Ltd. 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 Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents 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.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
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 Semiconductor Co.,Ltd. product that you intend to use.
In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require 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 consent of SANYO Semiconductor Co.,Ltd.
• The voltage gain is fixed internally to 40dB in dual mode and 46dB in BTL mode. These values cannot be altered by
connecting external components.
• Phase correction capacitance (600pF/TOTAL) is incorporated in the internal stages. Oscillation damping components
(R and C) are also incorporated in the output pin circuits.
• Power consumption
Note that the 8-pin DIP does not have a heat dissipating surface and that the power dissipation ratings are critical. The
maximum pow er dissipat io n of t he de vice is 1. 25W, an d 1 .5 W whe n t he devi ce is m ount ed on t he rec om m ended PCB.
The actual power dissipated depends on the supply voltage and the load conditions. Ensure that the device is kept within
its maximum rating. For AC supplies, transformer tappings may need to be adjusted to keep the device within
maximum ratings. VCC2
Pd max = π2RL + ICCO × VCC
Note
For BTL mode operation, the value of RL used in the calculation should be 1/2 the actual value.
• If the speaker plug jacks short to ground when connected, a protection resistor should be inserted in the output line.
• If the device is operated at or near its rated values, these values can be exceeded by small changes in operating
conditions, leading to device breakdown. Accordingly, ensure that a safety margin is maintained so as not to exceed the
maximum ratings.
• Check the PCB surface after soldering to ensure that no pins have been accidentally shorted. Any short between pins
could cause poor operating characteristics or permanently damage the device when power is applied.
• If making the PCB, check the printed wiring to ensure that no feedback loops occur between input and output.
This catalog provides information as of April, 2008. Specifications and information herein are subject to
change without notice.
