5 W, Two-channel Power Amplifier with Very Few

External Parts

Overview

The LA4485 is a 5 W, two-channel power amplifier IC that

requires a minimum of external parts, making it ideal for radio

cassette players and car stereo equipment.

The LA4485 eliminates the need for bootstrap capacitors,

negative feedback capacitors, and oscillation prevention CR

parts, all of which were necessities for power ICs previously.

All of these functions are now on chip, keeping the number of

external parts to an absolute minimum. The LA4485 is part of

the Power (Stylish Power) Series, and supports two modes:

dual and BTL.

Features

.

5W

× 2 output power in dual mode, and 15 W in BTL mode

.

Minimum external parts for the Power Series count:

4 or 5 parts in dual mode; 3 or 4 parts in BTL mode

.

Protection circuits

Overvoltage protection

Thermal protection

.

.

Pop noise reduction

.

Standby switch

.

Muting function

Package Dimensions

unit : mm

3107-SIP13H

[LA4485]

SANYO : SIP13H

Specifications

Maximum Ratings at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

No signal

24

V

Surge supply voltage

Based on the JASO standard

50

V

Peak output current

Per channel

3.3

A

Allowable power dissipation

Pd max

With infinite heat sink

15

W

Operating temperature

Topr

–30 to +80

°C

Storage temperature

Tstg

–40 to +150

°C

*: By the

π type B check point method.

Operating Conditions at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Recommended supply voltage

13.2

V

Supply voltage range

Must not be over package Pd

7.5 to 18

V

Recommended load resistance range

Dual

2 to 8

Ω

BTL

4to8

Ω

Ordering number: EN3680C

Monolithic Linear IC

LA4485

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

73096HA(II)/D2893TS/9041TS No.3680-1/20