SANYO LA4183 Datasheet

Ordering number: EN887B

Monolithic Linear IC

LA4183

2.3 W 2-Channel AF Power Amplifier for Radio
Cassette Players

Features

.

Built-in 2 channels enabling use in stereo and bridge
amplifier (BTL) applications.

.

High-output:

2.3 W typ./channel, V

4.7 W typ./bridge amplifier, V

.

Low switching distortion at high frequencies.

.

Minimum number of external parts required: 9 pcs. min.
(Stereo/bridge).

.

Small shock noise at the time of power supply ON/OFF due
to built-in muting circuit.

.

Good ripple rejection due to built-in ripple filter.

.

Soft tone at the time of output saturation.

.

Good channel separation.

.

Voltage gain fixed at 45 dB (Bridge: 51 dB).
Variable voltage gain available with external resistor added.

=9V,RL=4Ω

CC

=9V,RL=8Ω

CC

Package Dimensions

unit : mm

3022A-DIP12F

[LA4183]

SANYO : DIP12F

Note:
In general applications, heat generated in the DIP 12-pin
package can be radiated through the Cu-foiled area of the
printed circuit board, but since power dissipation Pd may be
increased depending on the supply voltage and load conditions,
it is recommended to use a fin additionally.

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

Allowable power dissipation Pd max
Operating temperature Topr –20 to +75 °C

Storage temperature Tstg –55 to +150 °C

CC

max

With signal 11 V
Quiescent 15 V
With printed circuit board

(Refer to Pd – Ta characteristics)

4W

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

Load resistance R

CC

L

Stereo 4.0 to 8.0 Ω
Bridge 8.0 Ω

9.0 V

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

53096HA(II)/O0207TA/2022KI,TS,ID No.887-1/11

LA4183

Operating Characteristics at Ta = 25°C, VCC=9.0V,f=1kHz, Rg = 600 Ω,RL=4Ω, ( ): 8 Ω,

See specified Test Circuit.

Parameter Symbol Conditions min typ max Unit

Quiescent current I

CCO

Voltage gain VG Closed loop, V
Voltage gain difference ∆VG Stereo ±1dB

Output power P

Total harmonic distortion THD P
Input resistance ri 21 30 kΩ
Output noise voltage V

NO

Ripple rejection ratio — Rg = 0, Vr = 150 mV Stereo 40 46 dB
Channel separation CHsep Rg = 10 kΩ,V

Pd max – Ta

Cu plate (fin1)

Fe plate (fin 1)

For stereo 40 55 mA

Stereo 43 45 47 dB
Bridge 49 51 53 dB

Stereo

1.7 2.3 W
(1.3) W

O

THD = 10%

= –45 dB

IN

Bridge (4.7) W

= 250 mW

O

Stereo 0.3 1.5 %
Bridge 0.5 %

Rg = 0 Stereo 0.3 1.0 mV
Rg=10kΩ Stereo 0.5 2.0 mV

= 0 dBm Stereo 40 55 dB

O

Fe plate (fin 2)

Recommended
printed circuit
board only

Cu-foiled area
reduced board

IC only

Allowable power dissipation, Pd max – W

Ambient temperature, Ta – °C

Pin Assignment and Equivalent Circuit

No.887-2/11

LA4183

Sample Application Circuit 1: Stereo amplifier

Sample Application Circuit 2: Bridge amplifier

Example of printed circuit pattern
(Cu-foiled area) for use in stereo, bridge amplifier applications

60 × 80 mm

2

C3
100µF
/16V

C1
100µF/16V

C2

100µF/16V

BTL use

IN1

100µF
/16V
IN2

BTL OUT

C9
100µF/16V

7

LA4183

6

12

GND

1

C4
100µF/16V

C7

OUT1

470µF
/16V

V

CC

C5

0.15µF

jumper
2ch stereo use

C6

0.15µF

OUT2

C8
470µF/16V

C10
1000µF
/16V

No.887-3/11

Description of External Parts

LA4183

C1 (C2) Feedback capacitor The low-range cut-offfrequency is determined by the following formula:

C3 (C4) Bootstrap capacitor The output at low frequencies depends on this capacitor. Ifthe capacity

C5 (C6) Oscillation preventing capacitor Use polyesterfilm capacitor whichis good in temperature characteristic

C7 (C8) Output capacitor The low-range cut-off frequency is determinedby the following formula.

C9 Decoupling capacitor Used for the ripple filter. Since the rejection effect is saturated at a

C10 Power source capacitor

f

=1/(2πC1vRf), fL: Low-range cut-off frequency

L

The frequency, however, affects the starting time in conjuction with
decoupling capacitors. Therefore, it is necessary to determine it after a
full review of the required low-frequency range and other similar
conditions.

is decreased, the output at low frequencies goes lower. 47 µF min. is
required.

and frequency characteristic. Aluminum electrolytic capacitor or
ceramic capacitor causes oscillation at low temperatures.

f

=1/(2πC7vRL), fL: Low-range cut-off frequency

L

When using bridge-connected, double the capacitance to obtain
equivalent low-range frequency characteristics to those in a 2-channel
application.

certain capacity, it is meaningless to increase the capacity more than
needed.
This capacitor, being also used for the time constant of the muting
circuit, affects the starting time.

Rf: Feedback resistor

(50 Ω embedded + Rf externally connected)

R

:Load resistance

L

Application Circuits

1. Voltage gain adjustment

.

Stereo
The voltage gain depends on built-in-resistors R1 (R2), R3 (R4) as follows:

VG = 20 log

If the IC is used at a voltage gain less than this, the following
equation with Rf added applies.

VG = 20 log

where R1 (R2) = 50 Ω typ.,

R3 (R4) = 10 kΩ typ.

.

Bridge
The following shows the bridge amplifier configuration, where ch1 operates as a non-inverting amplifier and ch2 as an inverting
amplifier.

R3 (R4)
R1 (R2)

[dB]

R3 (R4)

R1 (R2) + Rf

[dB]

No.887-4/11