Datasheet LA4627 Datasheet (SANYO)

Ordering number : ENN6501

LA4627

Monolithic Linear IC

LA4627

Two-Channel Audio Frequency Power Amplifier

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

Package Dimensions

unit : mm

3022B-DIP12F

[LA4627]

19.0

12

7

to space saving in end products.

7.62

6.45

Features

•

Provided in the DIP12F.

•PO :2.0 W ✕ 2 (VCC = 9 V, RL = 4 Ω)

2.5 W ✕ 2 (VCC = 9 V, RL = 3 Ω)

• Standby function built in
(supports direct microcontroller control).

• Built-in thermal protection circuit.

(0.61)

1

0.5

2.54

5.12

3.6

3.81

6

1.25

(3.46)

4.26max

3.5

0.51min

1.3

SANYO : DIP12F(300mil)

Specifications

Maximum Ratings at Ta = 25°C

Maximum supply voltage 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

Parameter Symbol Conditions Ratings Unit

CC max

Rg = 0 22 V

0.4

Operating Conditions at Ta = 25°C

Recommended supply voltage V
Recommended load resistance R
Operating voltage range V
Recommended operating load resistance RL op 2.7 to 8.0 Ω

Parameter Symbol Conditions Ratings Unit

CC

L

op

CC

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.

Under conditions such that the maximum ratings are not exceeded.

9V
3 Ω

5.0 to 20 V

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

42000 RM (IM)

No.6501-1/6

LA4627

Operating Characteristics at Ta = 25°C, V

Parameter Symbol Conditions

Quiescent current I
Voltage gain V
Total harmonic distortion THD PO = 0.33 W(VO = 1.0 V) 0.1 0.8 %
Output power PO(1) THD = 10 % 2.0 2.5 W

Output noise voltage V
Ripple rejection ratio SVRR Rg = 0, fR = 100 Hz, Vr = 0 dBm, DIN AUDIO 45 52 dB
Channel separation CHsep Rg = 0, VO = 0 dBm, DIN AUDIO 50 60 dB

Standby current I
Input resistance Ri 20 30 40 kΩ
Standby pin voltage V

7

Copper heat sink (Fin 1)

6.4

6

Steel heat sink (Fin 1)

5.7

Steel heat sink (Fin 2)

4.9

5

Mounted on the recommended
printed circuit board.

4

4.0

3

Independent IC

1.9

2

Pd max -- Ta

CCO

G

PO(2) THD = 10 %, RL = 4 Ω 2.0 W

NO

ST

ST

= 9 V, RL = 3 Ω, f = 1 kHz, Rg = 600 Ω

CC

Ratings

Rg = 0 17 30 70 mA
VO = 0 dBm 43 45 47 dB

Rg = 0, DIN AUDIO 0.15 0.5 mVrms

Rg = 0 1.0 10 µA

The pin 1 voltage such that the amplifier is on 1.5 5.0 V

25.0

10.7

53.0

min typ max

8.7

25.0

10.7

12.0

Unit

8.7

1

Allowable power dissipation, Pd max -- W

0

--20 2006040 80

Ambient temperature, Ta -- °C

Application Circuit

STBY

+5 V

output 1

V

output 2

1000 µF

R

L

CC

R

L

+

+

1000 µF

+

1000 µF

*Rx

4.7 kΩ

3.6 0.5

ILA00055 ILA00056

12 11 10

OUT1V

CC

8.0

POWER
GND

Fin 1

+

4.7 µF

987Fin

P. P D C

100 µF

(R. F)

8.0

+

1 µF

+

IN1

LA4627

PRE

OUT2 IN2STBY

123 456

Fin

GND

+

1 µF

• 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.)

3.6 0.5

Fin 2

input 1

input 2

Top view

ILA00057

No.6501-2/6

Block Diagram

PRE GND

ch1

Input

LA4627

STBY

1

Standby SW

7

R

Nf1

4

R

Nf2

ch1 input
amplifier

REF
amplifier

R

f1

TSD protector

R

f2

V

CC

12

Output
amplifier

ch1

11

Output

POWER GND

Fin

ch2

6

Input

Pin Functions

1. Standby switch function (pin 1)

Applied standby

voltage Vx

STBY pin applied voltage: 5 V
To hold the pin 1 inflow current to about 750 µA insert a resistor (Rx) of 4.7 kΩ
STBY pin applied voltage: 12 V
To hold the pin 1 inflow current to about 750 µA insert a resistor (Rx) of 14 kΩ (12 kΩ).
STBY pin applied voltage: Other value (Vx)
To hold the pin 1 inflow current to about 750 µA insert a resistor (Rx) of (Vx - 1.5 V)/750 µA.

ch2 input
amplifier

Pop noise prevention block Ripple filter

9 8

P.P Filter

STBY

Rx

+

The inflowing current at an
applied voltage of 1.5 V, i.e.
the point when the amplifier
turns on, is approximately
750 µA.

1

2 kΩ

Output
amplifier

2 kΩ

ILA00058

2

ch2
Output

ILA00059

• 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 (1.4 V).
The input pin impedance is about 30 kΩ.

• Although the recommended value for the input capacitor is 0.22 µF, 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 1.0 µF 2.2 µF 3.3 µF 4.7 µF 10 µF
Starting time (ts) 0.2 s 0.3 s 0.5 s 0.65 s 1.5 s

No.6501-3/6

LA4627

3. FILTER (decoupling) pin (pin 8)
The pin voltage is about 1/2 VCC.
The recommended value for the filter capacitor is 100 µF.
The pulse noise that occurs when the standby pin is set low (power off) will be degraded if a value under 100 µF is
used.

AC voltage (100 mV) AC voltage (200 mV)

Output DC voltage Output DC voltage

ILA00061 ILA00062

Filter capacitor = 100 µF Filter capacitor = 47 µF

V

CC

4. P.P (pulse noise) pin (pin 9)
Pin 9 pin voltage ≈ V

- VCE (about 0.3 V) - 5.6 V

CC

2 kΩ

+ 5.6 V

• The recommended value for the P.P capacitor is 4.7 µF.
The pulse noise that occurs when the standby pin is set low (power off) will

9

5 kΩ5 kΩ

be degraded if a value under 2.2 µF is used.
Furthermore, if a value over 10 µF is used, the signal may not be cut off and
sound may remain audible when the standby pin is set low (power off).

Zener voltage
= 5.6 V

To the input amplifier
block/bias system

ILA00063

5. MUTE (Muting)

The output signal can be controlled by shifting the pin 8 (FILTER) level towards ground with a 300 to 500 Ω resistor.
However, note that the degree of suppression is reduced if a value of 750 Ω or more is used.

Output AC voltage

Output DC voltage

Mute ON Mute OFF

ILA00064

No.6501-4/6

LA4627

10

8

-- W

O

6

VCC -- P

O

f = 1 kHz
THD = 10 %

= 4 Ω

L

R

-- mA
CCO

140

120

100

80

VCC -- I

CCO

Rg = 0
RL = 3 Ω

4

= 3 Ω

L

R

= 8 Ω

L

R

Output power, P

2

0

468101214161820

ILA00065

V

= 9 V

CC

RL = 3 Ω
VO = 1 Vrms

ILA00067

V

CC

RL = 3 Ω
VO = 0 dBm
Rg = 10 kΩ

2

➝

ILA00069

V

= 9 V

CC

RL = 3 Ω
VO = 0 dBm
VG = 45.5 dB

ILA00071

Total harmonic distortion, THD -- %

Channel separation, CHsep -- dB

Response -- dB

Supply voltage, V

10

7
5

3
2

1.0
7
5

3
2

0.1
7
5

3
2

0.01
23 57 23 57 23 57 23 57

10

100 1k 10k 100k

THD -- f

CC

Frequency, f -- Hz

0

--10

--20

--30

--40

--50

--60

--70

--80
23 57 23 57 23 57 23 57

10

CHsep -- f

CH2➝1

100 1k 10k 100k

Frequency, f -- Hz

2

0

--2

--4

--6

--8

--10

23 57 23 57 23 57 23 57

10

f -- Response

100 1k 10k 100k

Frequency, f -- Hz

-- V

CH1

= 9 V

60

40

Quiescent current, I

20

0

084122016 2462101814 22

100

7
5

3
2

10

7
5

3
2

1.0
7
5

3
2

0.1
7

5
3

Total harmonic distortion, THD -- %

2

0.01

0.1

0

--10

--20

--30

--40

--50

--60

Ripple rejection ratio, SVRR -- dB

--70

10

1.0

0.9

0.8

0.7

-- mVrms
NO

0.6

0.5

0.4

0.3

0.2

Output noise voltage, V

0.1
0

1k

Supply voltage, V

f = 10 kHz

23 57

Output power, P

SVRR -- f

23 57

100

Ripple frequency, f

23 57

THD -- P

1.0

23 571k23 57

VNO -- Rg

10k

-- V

CC

O

100 Hz

1 kHz

23 57

-- W

O

R

-- Hz

R

23 57

Signal source resistor, Rg -- Ω

ILA00066

V

= 9 V

CC

RL = 3 Ω

ILA00068

V

= 9 V

CC

RL = 3 Ω
Rg = 0
Vr = 150 mVrms
DIN AUDIO

ILA00070

V

= 9 V

CC

RL = 3 Ω
DIN AUDIO

ILA00072

10

10k

100k

No.6501-5/6

LA4627

5

4

Pd -- P

O

Pd = V

CC

✕ I

CC

f = 1 kHz

-- 2 ✕ P

O

Power dissipation, Pd -- W

3

2

1

LA4227 V

0

0.1

LA4627 V

CC

L

= 9 V / R

CC

= 4

L

= 9 V / R

Output power, P

= 3 Ω

1.0

Ω

2

O

35723 57

-- W

10

ILA00073

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.

This catalog provides information as of April, 2000. Specifications and information herein are subject
to change without notice.

No.6501-6/6

PS