LA4600.PDF

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LA4600e
Ordering number : EN6012
LA4600
Monolithic Linear IC
LA4600
.
Audio Power Amplifier for
Radio Cassette Recorders
Overview
Package Dimensions
unit: mm
3046B-SIP10F
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.
[LA4600]
25.5
24.0
3.6
3.6
Functions
• Output power : V CC = 12V/4
W
............
4.0W X 2
V CC = 9V/4
W
.............. 2.0W X 2
• Built-in stanby switch
• Built-in overheat protection (TSD)
1
10
1.32
2.54
0.5
1.3
0.45
1.6
SANYO : SIP10F
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
q
j-c
10.0
°
C / W
Operating temperature
Topr
– 20 to +75
– 40 to +150
°
C
Storage temperature
Tstg
°
C
Operating Conditions at Ta = 25
°
C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
Vcc
12
V
Recommended load resistance
R L
4
W
Operating supply voltage range
Vcc Op
Within maximum ratings
5.0 to 22
2.7 to 8
V
Operating load resistance range
W
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 Business Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
N1298RM(KI)
No. 6012-1/7
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LA4600
Electrical Characteristics at Ta = 25
°
C, V CC =12V, RL=4
W
, f=1 kHz
Parameter
Conditions
Ratings
Unit
Symbol
min
typ
max
Standby current
Ist
Standby pin —> GND
1.0
10
m
A
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=100 Hz DIN AUDIO
45
55
dB
Stanby ON voltage
Vst
1.5
5.0
V
Input resistance
Ri
20
30
40 K
W
Block Diagram
Standby
Vcc
7
4
Standby switching
CH1 input
10
CH1 input
amplifier
Predrive
amplifier
Output
amplifier
1
CH1 output
R f1
R Nf1
Small signal
GND
9
REF
amplifier
TSD protector
2
Large signal
GND
R Nf2
R f2
CH2 input
amplifier
Predrive
amplifier
Output
amplifier
3
CH2 output
CH2 input
8
Pop noise prevention block
Ripple filter
6
5
P. P
Filter
No. 6012-2/7
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LA4600
Sample Application
+5V
+
1000
µ
F
7
4
STANDBY
V CC
10
ch1
Input
ch1
Output
1
0.22
µ
F
1000 µ F
4
½
9
PRE GND
LA4600
POWER GND
2
8
ch2
Input
ch2
Output
3
0.22
µ
F
1000
µ
4
½
P.P
Filter
6
5
+
4.7
µ
+
100
µ
F
Pd max – Ta
14
12
With an arbitrary large heatsink ( q jc=10˚C/W)
12.5
10
8
7.5
6
50X50X1.5mm 3
5
4
No heatsink
1.94
3.0
2
1.16
–20
0
20
40
60
80
100
Ambient temperature, Ta – ˚C
No. 6012-3/7
F
F
0
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LA4600
Pin Descriptions
1. Standby switching function (7)
V CC
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 800
m
To bias circuit
A to pin 7.
Current supplied to pin 7
. .
Applied voltage Applied voltage – V BE (approx. 0.7V)
+
2 k
W
2 k
W
7
2k
½
• When directly connecting a microcontroller with this pin, add a resistor in series
to optimize the current for the microcontroller.
2k ½
2. Input pins (8,10)
.
• The recommended value for the input capacitor is 0.22
W
F, but this can be varied in order to adjust the starting time
(t s ). (The starting time is the time required from applying voltage to the standby pin until sound output is obtained. )
m
Input capacitator
1.0
m
F
2.0
m
F
3.3
m
F
4.7
m
F
10
m
F
Starting time (t s )
0.2s
0.3s
0.5s
0.65s
1.5s
3. Filter (decoupling) pin (5)
F.
When capacitance is lower, pop noise when setting the standby pin to Low (power OFF) will increase.
m
Filter capacitor= 100
m
Filter capacitor= 47
m
F
AC voltage (100 mV)
AC voltage (200mV)
Output DC voltage
Output DC voltage
No. 6012-4/7
Voltage at the input pins is approx. 2 V BE (1.4V).
Input impedance is approx. 30 k
Pin voltage is approx. 1/2 V CC .
The recommended value for the filter capacitor is 100
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LA4600
4. P.P (pop noise) pin (6)
V CC
Voltage at pin 6
. .
V CC – V CE (approx. 0.3V) – 5.6V
2
+
5.6V
• The recommended value for the P.P capacitor is 4.7
m
F.
5k ½
F, pop noise when setting the standby
pin to Low (power OFF) will increase.
m
6
5k
½
F, the sound will not be cut off when
setting the standby pin to Low (power OFF).
m
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 500
Output AC voltage
W
. If resistance
is higher than 750
W
, the suppression
Output DC voltage
ratio will decrease.
Mute ON
Mute OFF
No. 6012-5/7
When capacitance is lower than 2.2
When capacitance is higher than 10
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