15 W 2-channel BTL AF Power Amplifier

for Car Stereos

Overview

The LA4705 is a BTL two-channel power IC for car audio and

radio-cassette players developed in pursuit of excellent sound

quality. Low-region frequency characteristics have been

improved through the use of a new NF capacitorless circuit,

and crosstalk which causes ‘‘muddy’’ sound has been reduced

by improving both circuit and pattern layout. As a result, the

LA4705 provides powerful bass and clear treble. In addition,

the LA4705 features on-chip protectors and standby switch.

Features

.

High power: supports total output of 25 W + 25 W

.

Less pop noise

.

Designed for excellent sound quality

.

Any on time settable by external capacitor

.

Standby switch circuit on chip (microprocessor supported)

.

Various protectors on chip

load short/overvoltage/thermal shutdown circuit)

.

NF capacitorless

.

Package Dimensions

unit: mm

3109-SIP18H

[LA4705]

SANYO : SIP18H

Specifications

Maximum Ratings at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

No signal,t=60s

24

V

With signal

18

V

Surge supply voltage

t

% 0.2 s, single giant pulse

50

V

Allowable power dissipation

Pd max

Arbitrarily large heat sink

37.5

W

Operating temperature

Topr

–35 to +85

°C

Storage temperature

Tstg

–40 to +150

°C

Ordering number: EN3848D

Monolithic Linear IC

LA4705

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

D3096HA(II)/12693TS/4152TS No.3848-1/8