SANYO LA2655V Datasheet

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

Clear Sound Control IC

Loading "Plus Sound



" Algorithm

Ordering number:ENN6743

LA2655V

SANYO Electric Co.,Ltd. Semiconductor Company

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

Overview

The LA2655V is an IC for the sound replay which can be
used for the audio equipment such as the radio cassette re­corder, the personal computer, the stereo, and the televi­sion.

This IC has the function to replay a clear sound.

Package Dimensions

unit:mm

3179B-SSOP20

20

[LA2655V]

11

Features

Provides improved audio quality from one-way speaker
systems by incorporating the SANYO algorithm “Plus
Sound”, which corrects delay and attenuation differences
between high and low frequencies due to the characteris-

tics of the speaker.

Functions

• “Plus Sound” algorithm provided on chip.

• Clear sound signal processing.

• Variable effect level (with external parts).

• Effect ON/OFF switch.

Specifications

Absolute Maximum Ratings at Ta = 25˚C

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erutarepmetgnitarepOrpoT 07+ot52–

erutarepmetegarotSgtsT 521+ot04–

Operating Conditions at Ta = 25˚C

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egatlovlevel-woltupnIV

xam 31V

CC

Ta≤70˚C

CC

po 0.21ot5.4V

CC

HI
LI

(0.33)

4.4

1

0.65

0.22

10

6.5

1.5max

(1.3)

0.1

6.4

0.5

0.15

SANYO : SSOP20

0.9V

Vot5.2

CC

5.1ot0V

˚C
˚C

V

73101TN (KT) No.6743–1/4

LA2655V

Electrical Characteristics at Ta = 25˚C, VCC=9V, fm=1kHz, Vin=300mVrms=0dB, RL=10kΩ

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Block Diagram

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TGVssapyB2–02+Bd
CGVNO1–1+3+Bd

TxamoVssapyB5.12 smrV

CxamoVNO5.12 smrV
TDHTssapyB500.030.0%
CDHTNO80.05.0%

TonVssapyB59–mBd
ConVNO58–mBd

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sgnitaR

tinU

20

ON/OFF
control

1

Vcc

C7

+

Lch-IN

C11

2200p

R4

47µF

C8

C9

+

4.7 µF

C10

1µF

+

R3

2200p

C12

82000pF

Vcc AGND L-IN LC1 LC2 LC3 L-OUTN.C LV1 LV2

19 18 11121314151617

A

L-ch control box

B

A

R-ch control box

B

2 3 10987654

SW

SW

Lch-OUT

C13

1µF

+

CONT1 GND VREF R-IN RC1 RC2 RC3 R-OUT

L/H

C1

P1 Mode

+

4.7 µFC21µF

L I/O through
H effect

Rch-IN

+

C3

2200pF

RV1 RV2

R1

C4

2200pF

High level R1, R3 Remarks

Max –

Mid 18kΩ
Min 11kΩ

Low level R2, R4 Remarks

Max 10kΩ

Mid 24kΩ
Min –

C5

82000pF

R2

C6

Rch-OUT

1µF

+

No.6743–2/4