RCA LA42051 Diagram

Ordering number : ENA0078

LA42352

Monolithic Linear IC

5W 2-Channel AF Power Amplifier
With DC Volume Control

Overview

LA42352 is 5W 2-channel AF power amplifier with DC volume control intended for televisions.
LA42000 series is power IC which made Pin compatible possible altogether in 3 to 15W. They consist of four kinds of power
ICs. (mono, stereo, mono with volume function, stereo with volume function.). They realized PCB layout communalization
of an audio power block of TV.

PO

LA42051 5W
LA42052 5W
LA42351 5W
LA42352 5W
LA42071 7W
LA42072 7W
LA42152 15W

Channel

Mono Stereo

°

°

°
°

°
°
°

°

Volume

°

Feature

• PO 5W×2ch (VCC = 18V, RL = 8Ω, THD = 10%)

• Built-in DC Volume Control.

• Built-in Standby function.

• Built-in overheat protection.

Any and all SANYO Semiconductor 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 Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.

SANYO Semiconductor 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 Semiconductor
products described or contained herein.

92706 / 83005 MS PC B8-9060 No.A0078-1/9

LA42352

Specitications

Maximum Ratings at Ta = 25 °C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max No signal 24 V
Allowable power dissipation Pd max Infinite heat sink 15 W
Maximum junction temperature Tj max 150 °C
Thermal resistance θjc 3 °C/W
Operating temperature Topr -25 to +75 °C
Storage temperature Tstg -40 to +150 °C

Operating Conditions at Ta = 25 °C

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage VCC 18 V
Recommended load resistance RL 8 Ω
Allowable operating voltage range VCC op 10 to 22 V

Operating Characteristics at Ta = 25°C, VCC = 18V, RL = 8Ω, Volume = 5V, f = 1kHz, Rg = 600Ω

Parameter Symbol Conditions

Standby current I
Quiescent current I
Output power PO THD = 10% 4 5 W
Total harmonic distortion THD PO = 1W 0.1 0.8 %
Voltage gain VG VO = 0dBm 32.5 34.5 36.5 dB
Output noise voltage VNO Rg = 0, Volume = 0V,

Volume Attenuation Att VIN = 100mV, Vcont = 0V, with 1k-BPF 70 80 dB
Channel separation Sep. Rg = 10kΩ, VO = 0dBm 48 55 dB

(The Pin 5 voltage)
Input resistance Ri 14 20 26 kΩ

Amplifier off 1 10 µA

STB

Rg = 0, Volume = 0V 35 65 130 mA

CCO

BPF = 20Hz to 20kHz

V

-H Amplifier on 2.5 10 V Standby control voltage

STB

V

-L Amplifier off 0 0.5 V

STB

min typ max

*0dBm = 1mW (600Ω) = 774.6mVrms

Package Dimensions

unit : mm
3107B

Ratings

0.13 0.4 mVrms

Unit

No.A0078-2/9

Block Diagram

p

p

LA42352

IN1

Volume 1

Pre

GND

IN2

Volume 2

2

13

3

4

6

Ri =

20kΩ

Ri =

20kΩ

ut amplifier

In

ut amplifier

In

Standby

5

Thermal protection

circuit

VCC

7

Output amplifier

Output amplifier

12

11

10

8

OUT1

NF1

Power
GND

OUT2

Sample Application Circuit

C3

47µF

/25V

Ripple

Filter

1

+

IN1

2

+

1.0µF
/10V

PRE

GND

3

C1

IN2

4

+

1.0µF
/10V

C2

STB

5

CPU

LA42352

Vol 2

R3

10k

Ω

Ripple Filter

6

+5V

Block

1

Ripple

Filter

V

CC
7

1000µF

0.1µF

C4

/25V

+

C7

R1

2.2

OUT2

Ω

8

C9

47µF

/16V

+

C5

470µF

/16V

NF2

9

+

PWR
GND

10

RLR

9

NF2

NF1

11

+

470µF

L

C10

47µF

/16V

C6

/16V

OUT1

12

+

C8

0.1µF
R2

2.2

Ω

Vol 1

13

+5V

No.A0078-3/9