LA4461.PDF

Ordering number:ENN2660B

Monolithic Linear IC

LA4460N, 4461N

12W AF Power Amplifier

for Car Radio, Car Stereo

Features

• High gain of 51dB typ. and high power output of 12W

typ.

• Possible to delete output and bootstrap capacitors, this

encourages cost and space reductions due to external parts

reduction.

• Reduced external components (8 pieces recommended, 6

pieces minimum).

• Almost no pop noises heard during power on or off op-

eration.

• Soft tonal quality in saturated power output.

• Low distortion over low to high ranges of the audio fre-

quencies.

• Low residual noises (Rg=0).

• Good operation conditions because of SIP (single ended

pins) package having been employed for the LA4460N.

• All pin terminal layouts of the LA4461N are reversed for

easy stereo PC board pattern arrengement.

• Two ground terminals for pre-amplifier and power ampli-

fier are provided for easy PC board pattern arrangement

and for stabilizing distortion chracteristics depending on

signal source impedance.

• Voltage gain is fixed at 51dB, however, lowering the gain

is possible by adding a resistor.

• IC is not damaged, if it is connected reversely.

• Audio muting functions (AC mute & DC mute) are

equipped.

• Several protection circuits are installed, including :

a. Thermal protection circuit.

b. Overvoltage & surge voltage protection circuit.

c. Load short-circuit current limiting protection circuit.

d. Output pins DC short-circuit protection circuit.

(grounding protection between OUT & GND, and

speaker protection provided.)

Package Dimensions

unit:mm

3024A-SIP10H

[LA4460N, 4461N]

27.0

20.0

4.0

1.4

0.5

2.54

2.07

0.4

2.0

SANYO : SIP10H

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 Company

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

21500TN (KT)/90196RM/D187KI, TS No.2660–1/12

LA4460N, 4461N

Specifications

Absolute Maximum Ratings at Ta = 25˚C

V C

(

V C

I 1

I 7 I

Tc=75˚C, See Pd max – Ta graph.

˚C/W

–

˚C

–

Recommended Operating Conditions at Ta = 25˚C

R L

Operating Characteristics at Ta = 25˚C, V CC =13.2V, R L =4

, f=1kHz, Rg=600

, with 100

100

1.5mm 3

Al heat sink, See specified Test Circuit

I C

P O

P O =

r i

k W

V N 1

V N 2

–

(

A T

V O

M =

(Note) : For DC muting, ATT=¥

No.2660–2/12

, 9

LA4460N, 4461N

Equivalent Circuit Block Diagram

Sample Application Circuit 1 : Recommended Circuit

No.2660–3/12

LA4460N, 4461N

Sample Application Circuit 2 : An Example with Minimum Parts

Functional Description on the External Parts

Recommended number of the external parts for the LA4460N/4461N is 8 as shown in the Sample Application Circuit 1.

Namely they are :

· Feedback capacitors

2 pieces

4.7

F/6.3V

· Starting time adjustmant resistor

1 pieace

1.5k

· Oscillation compensation capacitor 1 piece

0.01

· Oscillation compensation C · R

4 pieces

0.033

2, 4.7

W´

a) Feedback capacitor CNF

This relates to a low range cutoff frequency f L , and f L lowers with increasing value of the ‘C NF and increases with

decreasing C NF .

b) Oscillation compensation capacitor C X

Signals are applied from the non-inverted NF terminal to the inverted NF terminal through the two C NF capacitors. It

is recommended to connect the oscillation compensation capacitor C X =0.01

No.2660–4/12

F between the floating junction of the

capacitors (minus side of C NF ) and GND. As a rule a polyester film capacitor is recommended, but a ceramic type

may be used if a PC board shows good circuit stability.

LA4460N, 4461N

c) Starting time adjustment resistor R X

The purpose of the R X is to adjust the starting time ts, and a resistor of 1.5k

is used. In this case, a rising DC locus

as shown below will be obtained at the output terminals.

s. after the power is turned on. Though the ts will increase with

decreasing R X , the total output across the load will be decreased, since the signal flowing to the non-inverted side will

flow into the ground through the R X . Contrarily, increasing the R X to R X =

as shown in the Sample Application

Circuit 2, the ts reduces to zero s., and the rising locus as shown below will be obtained.

between each channel output termi-

nal and GND. (As a rule the capacitor should be a polyester film capacitor.) This measure against the oscillation may

be replaced with the methods as shown below, depending upon the stability of PC boards used.

F plus 4.7

Note :

· Check for oscillation at low temperatures.

· Check for oscillation on stereo PC boards.

· Do not use shielded wires for output cords.

load resistor.

· Do not use shielded wires for output cords.

· L should be higher than 0.3

(Removal of oscillation compensation CR)

Coil used

Air core

Inner diameter : 8ø

Number of turns : 6 turns

Above examples can be applied to the Sample Application Circuits 1, 2.

Winding method : Solenoid (0.3

Features of IC System and Roles of the Remaining Pin Terminals

· Since a zero-bias design is introduced into the input circuit to keep the input potential at about zero by employing PNP

in the input circuit, an input coupling capacitor can be removed for direct connection. However, when noises caused by

a DC current flowing to a volume control circuit or the input circuit causes problems, connect a capacitor in series with

the input circuit.

· To prevent damage or deterioration of the IC due to the load short-circuited, a load short-circuit current limiting type

protection circuit has been provided.

However, when making the load short-circuit test, always mount the IC on the specified heat sink.

· A circuit which prevents pop noise caused by the power on-off operation is also provided, thereby reducing the offset

voltage and protecting speaker systems against damage.

Continued on next page.

No.2660–5/12

The circuit has been set to provide signals about 0.4

d) Oscillation compensation CR across the load

To prevent parasitic oscillation, it is recommended to connect 0.033

Note :

· Check for oscillation at low temperatures.

· Use 8

Wire size : UEW 1.5

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