Page 1
Ordering number : ENN6146
72502RM (OT) No. 6146-1/10
Overview
The LA4801V is a headphone stereo power amplifier for
portable CD and MD players. It features a high signal-tonoise ratio, a high ripple rejection ratio, low distortion,
and low current drain.
Functions
• Headphone stereo power amplifier
• Power switch
• Muting switch
• Center amplifier switch
Features
• High signal-to-noise ratio (96 dB typical at 7 µV)
• High ripple rejection ratio (76 dB typical)
• Low current drain (4.8 mA typical)
• Low power consumption achieved through the use of a
dual power supply system.
• No electrolytic capacitors required for the outputs.
• Ultraminiature package (SSOP-16)
Package Dimensions
unit: mm
3178A-SSOP16
18
916
6.4
0.5
4.4
5.2
0.1
1.5max
0.65
0.22
(0.33)
0.15
(1.3)
SANYO: SSOP16 (225 mil)
[LA4801V]
LA4801V
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Headphone Stereo Power Amplifier
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.
100
0
200
300
400
500
–10 0 20 40 60 80 100
Pd max — Ta
300
375
Ambient temperature, Ta — °C
Allowable power dissipation, Pdmax — mW
Page 2
No. 6146-2/10
LA4801V
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
CC
max 4.5 V
Allowable power dissipation Pd max 375 mW
Operating temperature Topr –15 to +50 °C
Storage temperature Tstg –40 to +150 °C
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage
V
CC
1 1.5 V
V
CC
2 2.5 V
Operating supply voltage range
V
CC
1 op 0.9 to 4.5 V
V
CC
2 op * 1.5 to 3.5 V
Recommended load resistance R
L
16 to 32 Ω
Operating Conditions at Ta = 25°C
Note: * However, when VCC2 is under 2.5 V, with a 1.5 V minimum, VCC1 must be less than or equal to VCC2.
Item Symbol Conditions
Ratings
Unit
min typ max
I
CCO
1 IC off: with pin 1 open. 0.05 1.0 µA
Quiescent current
I
CCO
2 Mute on 1.3 3.0 mA
I
CCO
3 Center amplifier off: with pin 3 at Vref 3.3 8.0 mA
I
CCO
4 No input 4.8 9.0 mA
Voltage gain VG V
O
= –10 dBm 10.3 11.8 13.3 dB
Channel balance ∆VG V
O
= –10 dBm –1 0 1 dB
Output power P
O
THD = 10% 6 13 mW
Total harmonic distortion THD P
O
= 0.5 mW 0.2 1.0 %
Output noise voltage V
NO
Rg = 1 kΩ, DIN AUDIO 7.8 15 µV
Crosstalk CT T
UN
1kHz, VO= –10 dBm 35 45 dB
Ripple rejection ratio SVRR
VCC= 1.0 V, fr = 100 kHz, Vr = –20 dBm, TUN100Hz
60 70 dB
Muting attenuation V
OFF
THD = 1%, TUN1kHz –80 –96 dB
Output DC offset V
DC OFF
V1 = 0 V, Rg = 1 kΩ –20 +20 mV
Power on current sensitivity I1 ON V
CC
1 = 0.9 V, VCC2 = 1.5 V, V5 ≥ 0.7 V 20 40 µV
Power off voltage sensitivity V1 OFF V
CC
1 = 0.9 V, VCC2 = 1.5 V, V5 ≤ 0.1 V 0.5 0.6 V
Mute off current sensitivity I16 OFF V
CC
1 = 0.9 V, VCC2 = 1.5 V, V5 ≥ 0.7 V 4.0 6.0 µV
Mute on voltage sensitivity V16 ON V
CC
1 = 0.9 V, VCC2 = 1.5 V, V5 ≥ 0.7 V 0.9 1.0 V
Electrical Characteristics at Ta = 25°C, VCC1 = 1.5 V, VCC2 = 2.5 V, fIN= 1 kHz, RL= 16 Ω
Page 3
No. 6146-3/10
LA4801V
PW A
PW C
PW B
1
2
3
4
5
6
7
8
PW SW
16
9
15
14
13
12
11
10
MT SW
RIPPLE
FILTER
VREF
BIAS
PW SW
IN A
PWR C CONT
IN B
V
REF
PRE GND
V
REF
CONT
RF OUT
MUTE SW
OUT A
OUT C
OUT B
PWR GND
VCC 1
RF CONT
VCC 2
300kΩ
3kΩ
10kΩ
1kΩ
10kΩ
3kΩ
Top view
Pin Assignment and Block Diagram
Page 4
No. 6146-4/10
LA4801V
PW A
PW C
PW B
1
2
3
4
5
6
7
8
PW SW
16
9
15
14
13
12
11
10
MT SW
RIPPLE
FILTER
VREF
3kΩ
300kΩ
BIAS
10kΩ
1kΩ
10kΩ
PW SW
IN A
PWR C CONT
IN B
V
REF
PRE GND
V
REF
CONT
RF OUT
MUTE SW
OUT A
OUT C
OUT B
PWR GND
VCC 1
RF CONT
VCC 2
Top view
Vcc 1
Vcc 1
Vcc 2
Vcc 2
ON
OFF
1kΩ
ON
OFF
1kΩ
SG
3.3µF
4.7
3.3
100kΩ
1
ON
OFF
0.15
220
4.3Ω
16Ω
16Ω
2Ω
4.3Ω
0.33
0.15
4.7
V
REF
µF
µF
µF
µF
µF
µF
µF
µF
Test Circuit
kΩ
Page 5
No. 6146-5/10
LA4801V
PW A
PW C
PW B
1
2
3
4
5
6
7
8
PW SW
16
9
15
14
13
12
11
10
MT SW
RIPPLE
FILTER
VREF
BIAS
PW SW
IN A
IN B
V
REF
PRE GND
V
REF
CONT
RF OUT
MUTE SW
OUT A
OUT C
OUT B
PWR GND
RF CONT
VCC 2
Top view
Vcc 1
Vcc 1
Vcc 2
Vcc 2
ON
OFF
ON
OFF
4.7
3.3
100kΩ
1
ON
F
0.15
220
4.3Ω
VR
VR
2Ω
4.3Ω
0.33µF
µF
µF
µF
µF
µF
µF
µF
0.15
4.7
V
REF
C1
1µF
1µF
C2
C9
C3
C4
C5
C11
R4
R3
C10
R2
R1
C8
C7
C6
VCC 1
PWR C
CONT
3.3µF
10kΩ
1kΩ
10kΩ
300kΩ
3kΩ
3kΩ
Sample Application Circuit
OF
Page 6
No. 6146-6/10
LA4801V
Pin Descriptions
Pin No. Pin name
Pin
Pin description Equivalent circuit
voltage (V)
• IC on/off switch
1
POWER SW
20kΩ
1
Continued on next page.
The pin voltage applies when VCC= 1.5 V and VCC2 = 2.5 V.
• Power input
2
4
POWER IN 0.82
300Ω
10kΩ
2
4
• Center amplifier on/off switch
• The center amplifier is on when this input
is floating or at the ground level.
3
POWER C CONT
100kΩ
300Ω
3
• V
REF
amplifier output
5
V
REF
OUT
0.82
300Ω
5
6
PRE GND
• V
REF
amplifier reference
7
V
REF
CONT
0.82
300Ω
1.2kΩ
7
Page 7
No. 6146-7/10
LA4801V
Continued from preceding page.
Pin No. Pin name
Pin
Pin description Equivalent circuit
voltage (V)
• Ripple filter output
8
RF OUT 2.17
300Ω
8
• Ripple filter reference
10
RF CONT 2.19
300Ω
3.9kΩ
45kΩ
30kΩ
10
• OUT A and OUT B are the power
amplifier outputs.
• Pin 13 (OUT C) is the center amplifier
output. This pin is a virtual ground when
driving headphones.
12
13
15
OUT B
OUT C
OUT A
0.69
12
13
15
9
V
CC
2
• Mute on/off switch
• The mute function is on when this pin is at
the ground level.
16
MUTE SW
300Ω
200kΩ
16
11
V
CC
1
14
PWR GND
Page 8
No. 6146-8/10
LA4801V
VG — VCC1
2 2.5
3
3.5
4.54 5
1.51
0.5
9
10
11
12
13
14
0
8
SVRR — VCC1
Po — VCC1
2.0 2.5
3.0
3.5
4.54.0 5.0
1.51.0
0.5
2
4
6
8
10
12
14
16
18
20
0
0
60
50
1.5 3.51.0
30
0.5
20
0
3.02.52.0 4.0 4.5 5.0
40
90
80
70
VG — f
Icco, IMute, Ist — VCC1
2.0 2.5
3.0
3.5
4.54.0 5.0
1.51.0
0.5
2
4
6
8
10
12
14
16
18
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0
20
15
1k
5
100
0
10
100k10k
10
40
25
30
35
RL=16Ω
Rg=1kΩ
VCC2=2.5V
VCC1=1.5V
VCC2=2.5V
Vo=–10dBm
RL=16Ω
VCC2=2.5V
RL=16Ω
f=1kHz
Vo=–20dBm
VCC2=2.5V
RL=16Ω
f=1kHz
THD=10%
RL=16Ω
Rg=1kΩ
fr=100Hz
VCR=–20dBm
Tun100Hz
Icco
ch1
ch2
ch1
ch2
ch1
ch2
ch1
ch2
Ist
I
Mute
Icco, I
Mute
, Ist — Ta
4
-30
3
10 50 60 700
1
-10
0
-20
403020 80
2
10
5
6
7
8
9
Icco
I
Mute
Ist
Rg=1kΩ
RL=16Ω
VCC1=1.5V
VCC2=2.5V
0.01
0.1
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0
VNO — VCC1
2.0 2.5
3.0
3.5
4.54.0 5.0
1.51.0
0.5
2
10
3
5
7
2
3
5
7
100
0
1.0
Rg=1kΩ
VCC2=2.5V
DIN AUDIO
ch1
ch2
VG — Ta
12
11
-30
10 50 60 700
9
-10
8
-20
403020 80
10
16
13
14
15
ch1
ch2
VCC1=1.5V
VCC2=2.5V
Vo=–20dB
RL=16Ω
Voltage gain, VG — dB
Voltage gain, VG — dB
Supply voltage, VCC1 — V
No signal current, mute state current, I
CCO
, I
Mute
— mA
Supply voltage, VCC1 — V
Supply voltage, V
CC
1 — V
Output power, P
O
— W
Standby current, Ist — µA
Ambient temperature, Ta — °C
Supply voltage, V
CC
1 — V
Output noise voltage, V
NO
— µV
Supply voltage, VCC1 — V
Voltage gain, VG — dB
Frequency, f — Hz
Ambient temperature, Ta — °C
No signal current, mute state current, I
CCO
, I
Mute
— mA
Standby current, Ist — µA
Ripple rejection ratio, SVRR — dB
Page 9
No. 6146-9/10
LA4801V
THD — V
IN
1.0
7
-25-30
3
2
-35
0.1
-40
-10-15-20 0-5
5
7
3
2
5
7
3
2
5
100
10
RL=16Ω
Rg=1kΩ
f=1kHz
BPF=400Hz
to 80kHz
ch1
ch1
ch2
ch2
THD — VCC1
2 2.5
3
3.5
4.54 5
1.51
0.5
0.1
2
3
5
7
2
3
5
7
2
3
5
7
1.0
10
0
0.01
VCC2=2.5V
Vo=–20dBm
RL=16Ω
f=1kHz
BPF=400 to
80kHz
ch1
ch2
THD — f
10010
1
0.1
2
3
5
7
2
3
5
7
1k 10k 100k
10
VCC=1.5V
VCC2=2.5V
Po=0.5mW
RL=16Ω
80kHz LPF
ch1
ch2
V
REFDC
, VN — Ta
10 20
30
40
60 7050 80
0-10
-20
0.2
0.4
0.6
0.8
1.0
1.2
1.4
-30
0
V
REF
, VO — VCC1
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
2.0
1.8
0
THD — Ta
10 20
30
40
60 7050 80
0-10
-20
1
10
-30
0.1
2
3
5
7
2
3
5
7
CT — f
40
35
1k
25
100
20
10
2 3 5 7 2 3 5 7 2 3 5 7 2 3 5 7
10k 100k
30
70
45
50
55
60
65
VCC2=2.5V
V
REF
OUTA, B, C
V
REFDC
V
N
1 → 2
2 → 1
VCC1=1.5V
VCC2=2.5V
Vo=–10dBm
RL=16Ω
Rg=1kΩ
Rg=1kΩ
RL=16Ω
VCC1=1.5V
VCC2=2.5V
ch1
ch2
VCC1=1.5V
VCC2=2.5V
Vo=0.5mW
RL=16Ω
2 2.5
3
3.5
4.54 5
1.51
0.5
0
Crosstalk, CT — dB
Supply voltage, VCC1 — V
V
REF
, V
O
— V
Supply voltage, VCC1 — V
Ambient temperature, Ta — °C
Total harmonic distortion, THD — %
Ambient temperature, Ta — °C
Supply voltage, V
IN
— dBm
Total harmonic distortion, THD — %
Frequency, f — Hz
Total harmonic distortion, THD — %
Frequency, f — Hz
V
REFDC
, V
N
— mA
Total harmonic distortion, THD — %
Page 10
PS No. 6146-10/10
LA4801V
This catalog provides information as of July, 2002. 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.
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