Preamplifier + Power Amplifier

for 1.5 V Headphone Stereos

Overview

The LA4587M is a system IC that includes all of the necessary

functions for a playback set on a single chip, reducing the

number of external components needed.

Functions

.

Stereo preamplifier (supports auto reverse function,

switchable between metal and normal tape)

.

Stereo power amplifier (OCL, mute function)

.

Ripple filter

.

Low boost function (BTL operation in low-frequency range)

.

AMSS (Automatic Music Select System)

.

Power switch

Features

.

.

Preamplifier requires no NF capacitor.

.

Virtual ground capacitor can be 1 µF or less. (Lower

.

Ripple filter requires no capacitor for preventing oscillation.

.

Powerful output is obtained in low boost output

.

A high-frequency cutoff capacitor is built into the

preamplifier and power amplifier inputs; anti-buzz provision.

Package Dimensions

unit : mm

3102-QFP48D

[LA4587M]

SANYO : QIP48D

Specifications

Maximum Ratings at Ta=25 °C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

3.0

V

Allowable power dissipation

Pd max

635

mW

Operating temperature

Topr

–10 to +60

°C

Storage temperature

Tstg

–40 to +125

°C

Ambient temperature, Ta − °C

Ordering number: EN5204A

Monolithic Linear IC

LA4587M

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

13097HA(II)/N3095HA(II) No.5204-1/18