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.
O0808 MS JK/42000 RM (IM) No.6501-1/7
LA4627
Overview
The LA4627 is a 2-channel power amplifier developed for use in radio/cassette player products. The LA4627 reduces the
number of required external components by 50% over earlier products (BS/NF capacitors and oscillation prevention RC
components) and thus can contribute significantly to space saving in end products.
Features
• Provided in the DIP12F.
• PO : 2.0W×2 (VCC = 9V, RL = 4Ω)
2.5W×2 (VCC = 9V, RL = 3Ω)
• Standby function built in (supports direct microcontroller control).
• Built-in thermal protection circuit.
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max Rg = 0 22 V
Allowable power dissipation Pd max When mounted on the Sanyo-recommended PCB 4.0 W
Operating temperature Topr -25 to +75 °C
Storage temperature Tstg -55 to +150 °C
Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage VCC 9 V
Recommended load resistance RL 3 Ω
Operating voltage range VCC op Under conditions such that the max imum rating s are no t ex ceeded. 5.0 to 20 V
Recommended operating load resistance RL op 2.7 to 8.0 Ω
Monolithic Linear IC
2-Channel AF Power Amplifier
Orderin
g
numbe
r
: EN6501A
LA4627
No.6501-2/7
Electrical Characteristics at Ta = 25°C, VCC = 9V, RL = 3Ω, f = 1kHz, Rg = 600Ω
Ratings
Parameter Symbol Conditions min typ max
Unit
Quiescent current ICCO Rg = 0 17 30 70 mA
Voltage gain VG V
O = 0dBm 43 45 47 dB
Total harmonic distortion THD PO = 0.33W (VO = 1.0V) 0.1 0.8 %
PO1 THD = 10% 2.0 2.5 W Output power
PO2 THD = 10%, RL = 4Ω 2.0 W
Output noise voltage VNO Rg = 0, DIN AUDIO 0.15 0.5 mVrms
Ripple rejection ratio SVRR Rg = 0, fR = 100Hz, Vr = 0dBm, DIN AUDIO 45 52 dB
Channel separation CHsep Rg = 0, VO = 0dBm, DIN AUDIO 50 60 dB
Standby current IST Rg = 0 1.0 10 µA
Input resistance Ri 20 30 40 kΩ
Standby pin voltage VST The pin 1 voltage such that the amplifier i s o n 1.5 5.0 V
Package Dimensions
unit : mm (typ)
3022B
8.0
3.6
10.7
25.0
0.5
8.7
10.7
25.0 8.7
8.0
12.0
53.0
3.6 0.5
Fin 1 Fin 2
1
2
3
4
5
6
7
0
-20 0 20 40 60 80
Allowable power dissipation, Pd max -- W
Pd max -- Ta
Ambient temperature, Ta -- °C
6.4 Copper heat sink (Fin 1)
5.7 Steel heat sink (Fin 1)
4.9 Steel heat sink (Fin 2)
Mounted on the recommended
printed circuit board.
1.9 Independent IC
4.0
LA4627
No.6501-3/7
Block Diagram
ch1 input
amplifier
REF
amplifier
Output
amplifier
ch2 input
amplifier
Standby SW
Pop noise prevention block Ripple filter
TSD protector
Output
amplifier
Rf1
RNf1
RNf2 Rf2
Fin
11
2
ch1
Output
POWER GND
ch2
Output
VCC
112
STBY
4
7
6
ch1
Input
PRE GND
ch2
Input
98
P.P Filter
Application Circuit Example
POWER
GND
Fin
Fin
LA4627
STBY
+5V
output 1
input 1
+
VCC OUT1 P.P DC IN1
(R.F)
STBY OUT2 PRE
GND IN2
VCC
1000µF1µF
1000µF
4.7µF
100µF
RL
+
3 4
4.7kΩ
*Rx
Pins 3, 5, 10 must be left open.
* Rx : If the STBY pin (pin 1) is used, observe the following :
Insert the resistor Rx in series to limit the inflowing current.
(The amplifier will be on when a voltage is applied to pin 1.)
+
+
5 621
10 9 8 71112
output 2 1000µF
RL
+
input 2
Top view
1µF
+
+
LA4627
No.6501-4/7
Pin Functions
1. Standby switch function (pin 1)
A
pplied standby
voltage Vx
2kΩ
2kΩ
STBY
Rx
+1
The inflowing current at an
applied voltage of 1.5V, i.e.
the point when the amplifier
turns on, is approximately
750µA.
STBY pin applied voltage : 5V
To hold the pin 1 inflow current to about 750µA insert a resistor (Rx) of 4.7kΩ
STBY pin applied voltage : 12V
To hold the pin 1 inflow current to about 750µA insert a resistor (Rx) of 14kΩ (12kΩ).
STBY pin applied voltage : Other value (Vx)
To hold the pin 1 inflow current to about 750µA insert a resistor (Rx) of (Vx − 1.5V)/750µA.
• If a microcontroller output signal is applied directly, insert a resistor in series and adjust the current to a level
optimal for the drive capability of the microcontroller.
2. Input pins (pins 6 and 7)
The input pin voltage is about 2VBE (1.4V).
The input pin impedance is about 30kΩ.
• Although the recommended value for the input capacitor is 0.22µF, the starting time can be modified by changing
the value of this capacitor. (The time from the point a voltage is applied to the standby pin to the point sound is
emitted.)
Input capacitor 1.0µF 2.2µF 3.3µF 4.7µF 10µF
Starting time (ts) 0.2s 0.3s 0.5s 0.65s 1.5s
LA4627
No.6501-5/7
3. FILTER (decoupling) pin (pin 8)
The pin voltage is about 1/2VCC.
The recommended value for the filter capacitor is 100µF.
The pulse noise that occurs when the standby pin is set low (power off) will be degraded if a value under 100µF is
used.
A
C voltage (100mV)
Output DC voltage
Filter capasitor = 100
µ
F
AC voltage (200mV)
Output DC voltage
Filter capasitor = 47
µ
F
4. P.P (pulse noise) pin (pin 9)
Pin 9 pin voltage ≈ VCC − VCE (about 0.3V) − 5.6V
2kΩ + 5.6V
• The recommended value for the P.P capacitor is 4.7µF.
The pulse noise that occurs when the standby pin is set low (power
off) will be degraded if a value under 2.2µF is used.
Furthermore, if a value over 10µF is used, the signal may not be cut
off and sound may remain audible when the standby pin is set low
(power off).
5. MUTE (Muting)
The output signal can be controlled by shifting the pin 8 (FILTER) level towards ground with a 300 to 500Ω resistor.
However, note that the degree of suppression is reduced if a value of 750Ω or more is used.
Mute ON Mute OFF
Output DC voltage
Output AC voltage
5kΩ5kΩ
=5.6V
Zener voltage
To the input amplifie
r
block/bias system
VCC
9
LA4627
No.6501-6/7
VNO -- Rg
0
0.2
0.1
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
2735 10K 2735100K1k
Signal source resistor, Rg -- Ω
VCC
=
9V
RL
=
3Ω
Output noise voltage, VNO -- mVrms
DIN/AUDIO
RL
=
3Ω
RL
=
4Ω
RL
=
8Ω
PO -- VCC
4 6 8 101214161820
0
2
4
6
8
10
Output power, PO -- W
Supply voltage, VCC -- V
THD
=
10%
f
=
1kHz
ICCO -- VCC
0 2 4 6 8 1012141618202224
0
20
40
60
80
100
120
140
Quiescent current, ICCO -- mA
Supply voltage, VCC -- V
Rg
=
0
RL
=
3Ω
THD -- f
0.1
0.01
2
3
5
7
1.0
2
3
5
7
10
2
3
5
7
2357
100 2357
1k 2357
10k 2357
100k10
Frequency, f -- Hz
VCC
=
9V
RL
=
3Ω
VO
=
1Vrms
Total harmonic distortion, THD -- %
CH2 1
CH1 2
CHsep -- f
-80
-70
-60
-50
-40
-30
-20
-10
0
23 7510010 23 751k 23 7510k 23 75100k
Frequency, f -- Hz
VCC
=
9V
RL
=
3Ω
Rg
=
10
kΩ
VO
=
0dBm
Channel separation, CHsep -- dB
SVRR -- fR
-70
-60
-50
-40
-30
-20
-10
0
23 57
10 100 23 57
1k 23 57
10k
Ripple frequency, fR -- Hz
VCC
=
9V
RL
=
3Ω
Rg
=
0
DIN/AUDIO
Vr
=
150mVrms
Ripple rejection ratio, SVRR -- dB
f -- Response
-10
-8
-6
-4
2
-2
0
23 57
100 23 57
1k 23 57
10k 23 57
100k10
Frequency, f -- Hz
VCC
=
9V
RL
=
3Ω
VO
=
0dBm
VG
=
45.5dB
Response -- dB
THD -- PO
0.1
0.01
2
3
5
7
1.0
2
3
5
7
2
3
5
7
10
100
2
3
5
7
23 57
1.0 23 57
100.1
Output power, PO -- W
VCC
=
9V
RL
=
3Ω
Total harmonic distortion, THD -- %
f
=
10kHz
1kHz
100Hz
LA4627
PS No.6501-7/7
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.
This catalog provides information as of October, 2008. Specifications and information herein are subject
to change without notice.
Pd -- PO
0
1
2
3
4
5
5723
0.1 1.0 5723 10
VCC
=
9V/RL
=
3Ω
VCC
=
9V/RL
=
4
Ω
f
=
1kHz
Pd
=
VCC×ICC-2×PO
Output power, PO -- W
Power dissipation, Pd -- W
