Ordering number : EN6012A

Monolithic Linear IC
For Radio Cassette Recorders
LA4600 Audio Power Amplifier

Overview
The LA4600 is an audio power amplifier which requires minimum count of external parts by incorporating BS capacitor,
NF capacitor; and oscillation prevention CR components into the IC circuitry.

Features
• Output power : VCC = 12V/4Ω............. 4.0W×2
VCC = 9V/4Ω .............. 2.0W×2
• Built-in standby switch
• Built-in overheat protection (TSD)

Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max Rg = 0 (No signal) 24 V
Allowable power dissipation Pd max With an arbitrary large 12.5 W
Thermal resistance θj-c 10.0 °C/W
Operating temperature Topr −20 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 12 V
Recommended load resistance RL 4 Ω
Operating supply voltage range VCC op Within maximum ratings 5.0 to 22 V
Operating load resistance range RL op 2.7 to 8 Ω

Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.

O0808 MS JK/N1298RM(KI) No.6012-1/6

 LA4600
Electrical Characteristics at Ta = 25°C, VCC = 12V, RL = 4Ω, f = 1kHz
Ratings
Parameter Symbol Conditions Unit
min typ max
Standby current IST Standby pin → GND 1.0 10 µA
Quiescent current ICCO Rg = 0 18 32 64 mA
Voltage gain VG VO = 0dBm 43.0 45.0 47.0 dB
Total harmonic distortion THD PO = 1W 0.2 0.8 %
Output noise voltage VNO Rg = 0, DIN AUDIO 0.15 0.5 mV
Output voltage PO1 THD = 10% 3.0 4.0 W
PO2 VCC = 9V, THD = 10% 1.5 2.0 W
Channel separation CHsep VO = 0dBm, Rg = 0, DIN AUDIO 50 60 dB
Ripple rejection ratio SVRR VR = 0dBm, Rg = 0, fr = 100Hz DIN AUDIO 45 55 dB
Standby ON voltage VST 1.5 5.0 V
Input resistance Ri 2.0 30 40 KΩ

Package Dimensions
unit : mm (typ)
3046D
Pd max -- Ta
14
With an arbitrary large heatsink (θjc = 10°C/W)
Allowable power dissipation, Pd max -- W
12.5
12

10

8
7.5

6
50×50×1.5mm3
5
4

3.0
No heatsink 1.94
2
1.16
0
-20 0 20 40 60 80 100
Ambient temperature, Ta -- °C

Block Diagram

Standby VCC
7 4

Standby switching

ch1 input 10 Output

CH1 input Predrive
amplifier amplifier 1 ch1 output
amplifier

Rf1

RNf1

Small signal
GND 9
REF TSD protector 2 Large signal
amplifier GND
RNf2
Rf2

CH2 input Predrive Output

amplifier amplifier 3 ch2 output
ch2 input 8 amplifier

Pop noise prevention block Ripple filter

6 5
P.P Filter

Νο.6012-2/6
 LA4600
Sample Application

+5V +
1000µF

7 4
STANDBY VCC

+ ch1 1 +
10 ch1
Input Output
0.22µF 1000µF 4Ω

9 PRE GND LA4600 POWER GND 2

+ ch2 ch2 +
8 Input Output 3
0.22µF 1000µF 4Ω

P.P Filter
6 5

+ +
4.7µF 100µF

Pin Descriptions
1. Standby switching function (7) VCC
Power is switched ON and OFF by controlling the High and Low states
at pin 7, respectively (standby). To switch power ON, apply 1.5V or more,
or 800µA to pin 7.
To bias circuit

Current supplied Applied voltage Applied voltage − VBE (approx. 0.7V)

≈ +
to pin 7 2kΩ 2kΩ

• When directly connecting a microcontroller with this pin, add a resistor in

series to optimize the current for the microcontroller. 7
2kΩ
2kΩ

2. Input pins (8, 10)

Voltage at the input pins is approx. 2VBE (1.4V).
Input impedance is approx. 30kΩ.
• The recommended value for the input capacitor is 0.22µF, but this can be varied in order to adjust the starting time (ts).
(The starting time is the time required from applying voltage to the standby pin until sound output is obtained. )

Input capacitor 1.0µF 2.0µF 3.3µF 4.7µF 10µF

Starting time (ts) 0.2s 0.3s 0.5s 0.65s 1.5s

Νο.6012-3/6
 LA4600
3. Filter (decoupling) pin (5)
Pin voltage is approx. 1/2VCC.
The recommended value for the filter capacitor is 100µF.
When capacitance is lower, pop noise when setting the standby pin to Low (power OFF) will increase.

AC voltage (100mV) AC voltage (200mV)

Output DC voltage Output DC voltage

Filter capasitor = 100µF Filter capasitor = 47µF

4. P.P (pop noise) pin (6)

VCC

VCC − VCE (approx. 0.3V) – 5.6V

Voltage at pin 6 ≈ + 5.6V
2kΩ

• The recommended value for the P.P capacitor is 4.7µF.

5kΩ
When capacitance is lower than 2.2µF, pop noise when setting
the standby pin to Low (power OFF) will increase. 6

When capacitance is higher than 10µF, the sound will not be cut 5kΩ
off when setting the standby pin to Low (power OFF).

Zener voltage
=5.6V
To input amplifier/
bias circuitry

5. Muting
The output signal can be controlled by connecting pin 5 (Filter) to ground via a resistance of 300 to 500Ω. If
resistance is higher than 750Ω, the suppression ratio will decrease.

Output AC voltage

Output DC voltage

Mute ON Mute OFF

Νο.6012-4/6
 LA4600
VCC -- PO VCC -- ICCO
10 80
THD = 10% Rg = 0
9 f = 1kHz
70

Quiescent current, ICCO -- mA

8
60
Output power, PO -- W

6 50

4Ω
5 40

L=
3Ω

R
L=
4
R

30
3 Ω
=8 20
2 RL
1 10

0
4 8 12 16 20 24 04 8 12 16 20 24 28

Supply Voltage, VCC -- V Supply Voltage, VCC -- V

10
THD -- f THD -- PO
100
7 VCC = 12V 7 VCC = 12V
5 RL = 4Ω 5
RL = 4Ω
Total harmonic distortion, THD -- %

Total harmonic distortion, THD -- %

3 PO = 1W 2 PO = 1W
2 Rg = 600Ω Rg = 600Ω
10
7
1.0 5
7 3
5 2
3 1.0
7
2 5
2ch 3 1ch
0.1 2
7
5 1ch 0.1 2ch
7
3 5
2 3
2
0.01 0.01
10 2 3 5 7 100 2 3 5 7 1K 2 3 5 7 10k 2 3 5 7100k 0.1 2 3 5 7 1.0 2 3 5 7 10
Frequency, f -- Hz Output power, PO -- W
CHsep -- f SVRR -- fR
80 80
VCC = 12V
RL = 4Ω
70 70 Vr = 0dBm
Channel separation, CHsep -- dB

Rg = 0
Ripple rejection, SVRR -- dB
1
-ch

DIN AUDIO
ch2

60 60 ch1
ch2
2
-ch

50 50
ch1

40 40
VCC = 12V
RL = 4Ω
30 30
VO = 0dBm
Rg = 0
DIN AUDIO
20 20
2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 2 3 5 7 100 2 3 5 7 1k 2 3

Frequency, f -- Hz Ripple frequency, fR -- Hz

f -- Response VNO -- Rg
1 1.0
VCC = 12V VCC = 12V
0 RL = 4Ω 0.9 RL = 4Ω
F

VO = 0dBm DIN AUDIO

0µ

Output noise voltage, VNO -- mV

220

-1 0.8
ut =

0.7
-2
Co
Response -- dB

0µF

0.6
-3
= 100

0.5
-4
Cout

0.4
-5
0.3
-6
0.2

-7 0.1

-8 05
10 2 3 5 7 100 2 3 5 7 1k 2 3 5 7 10k 2 3 5 7100k 7 1K 2 3 5 7 10K 2 3 5 7
Frequency, f -- Hz Signal source impedance, Rg -- Ω

Νο.6012-5/6
 LA4600
Pd -- PO Pd -- PO
10 10
RL = 3Ω RL = 4Ω
9 f = 1kHz 9 f = 1kHz
Rg = 600Ω Rg = 600Ω
8 8

Power dissipation, Pd -- W
Power dissipation, Pd -- W

7 7

5V
=1
6 6
C 5V
5 VC
= 12V 5 =1
C V
V CC VC = 12
4 4 VCC
9V
3 V CC = 3
VCC = 9V
2 2

1 1

0 0
7 0.1 2 3 5 7 1.0 2 3 5 7 10 7 0.1 2 3 5 7 1.0 2 3 5 7 10
Output power, PO -- W Output power, PO -- W
Pd -- PO
6
RL = 8Ω
f = 1kHz
5 Rg = 600Ω
Power dissipation, Pd -- W

5V
=1
3 V CC
VCC = 12V
2
V
CC =
9V
1

0
7 0.1 2 3 5 7 1.0 2 3 5 7 10
Output power, PO -- W

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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 Co.,Ltd.
products described or contained herein.
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semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
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SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
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above.

This catalog provides information as of October, 2008. Specifications and information herein are subject to
change without notice.

PS No.6012-6/6