LA4525.PDF

Ordering number: EN4022C

Monolithic Linear IC

LA4525

Dual AF Power Amplifier

for Radio Cassette Recorders

Overview

Package Dimensions

unit : mm

The LA4525 requires only a small number of external

components to drive either two 4 W speakers or one 8 W

speaker. The output power is typically 0.65 W when driving

two 4 W speakers.

3001B-DIP8

[LA4525]

Features

. Two-channel (dual) or single-channel (BTL) operation

. 0.65 W (typ) output power into two 4 W speakers

. Wide power supply range: 3 to 15 V

. 8-pin DIP (No heat sink needed)

SANYO : DIP8

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

V CC max Rg = 0

Allowable power dissipation

Pd max

Note

1.5 W

Operating temperature

Topr

–25 to +75 °C

Storage temperature

Tstg

–40 to +150 °C

Note: Mounted on a 50 ´ 50 ´ 1.6 mm 3 heat dissipating board

Recommended Operating Conditions at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Supply voltage

V CC

Load resistance range

R L

Supply voltage range

V CC op

Not in excess of package Pd

3 to 15

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.

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

32896HA(II)/D0192TS/4162TS No.4022-1/9

. Requires only a few external components.

LA4525

Operating Characteristics at V CC = 6 V, Ta =25°C, R L =4

,f=1kHz, Rg = 600

Dual operation unless otherwise noted

Parameter

Symbol

Condition

min typ max Unit

Quiescent supply current

I CCO Rg=0

10 15 30 mA

Output power

P O 1 THD = 10%

0.45 0.65

P O 2 V CC =9V,R L =8 W , THD = 10%

1.0

Voltage gain

VG V O = 0 dBm

38 40 42 dB

Total harmonic distortion

THD P O = 0.1 W

0.2 0.7 %

Output noise voltage

V NO Rg=0

, DIN AUDIO filter

100 400 µV

Supply voltage ripple rejection SVRR Rg = 0

,f R = 100 Hz, V R = 0 dBm

35 43

Channel separation

CH Sep V O = 0 dBm, R g =0 W

45 55

Input resistance

70 100 130 k W

Equivalent Block Diagram

IN2

Ch2

input

amp.

Pre-

driver

amp.

Output

amp.

BTL IN

OUT2

PRE GND

POWER GND

IN1

Ch1

input

amp.

Pre-

driver

amp.

Output

amp.

OUT1

Pin Description

Number

Name

Description

OUT1 Channel 1 output

V CC

Supply voltage

OUT2 Channel 2 output

POWER GND Power amplifier ground

BTL IN Bridge test load input

IN2

Channel 2 input

IN1

Channel 1 input

PRE GND Preamplifier ground

No.4022-2/9

LA4525

Mounted on Sanyo

recommended board

Independent IC

Ambient temperature, Ta – °C

Dual Operation

Unit (capacitance:F)

Sample Printed Circuit Pattern

Unit (capacitance:F)

65 ´ 65mm 2 (Cu-foiled area)

No.4022-3/9

LA4525

External Components Comparison

Pin Voltages

External components

Existing

Sanyo ICs

LA4525

Pin number

Pin name

Pin voltage

OUT1

2.8 V

Output capacitors

V CC

Input capacitors

OUT2

2.8 V

Bootstrap capacitors

POWER GND

0 V

Feedback capacitors

BTL IN

65 mV

Filter capacitors

IN2

1.4 V

Oscillation damping mylars ¥

IN1

1.4 V

Dual-mode operation total

PRE GND

0 V

Supply voltage, V CC –V

Input voltage, V IN –mV

Output power, P O –W

Frequency,f–Hz

Output power, P O –W

No.4022-4/9

Output noise voltage, V NO –mV

Frequency response – dB

Current drain, I CC –mA

Ripple rejection, SVRR – dB

Channel separation, CH sep – dB

Power dissipation, Pd – W

Output power, P O –W

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