LA4425A.PDF

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Ordering number: EN3309C
Monolithic Linear IC
LA4425A
5 W Power Amplifier with Very Few External Parts
for Car Radio and Car Stereo
. The world’s first power amplifier with very few external
parts.
The smallest package in the industry
® [SIP-5H (TO-126 type)]
Only two external parts
® [Only I/O coupling capacitors]
Package Dimensions
unit : mm
3031A-SIP-5H
[LA4425A]
. Almost no evaluation, adjustment and check of its functions
as a power IC required
® [Simplified control]
. Wide operation supply range ® 5to16V
. On-chip protection:
Overvoltage protection
Thermal protection
Output D.C. short protection
. On-chip pop noise reducing circuit
SANYO : SIP5H
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V CC max Rg = 0
18
V
Surge maximum supply voltage
V CC surge
Giant pulse 200 msec
Rise time 1 ms
50
V
Maximum output current
I O peak
3.3
A
Allowable power dissipation
Pd max
With infinite heat sink
7.5
W
Operating temperature
Topr
–30 to +80
°C
Storage temperature
Tstg
–40 to +150
°C
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V CC
13.2
V
Recommended load resistance
R L
4
W
Operating voltage range
V CC op
5to16
V
Operating load resistance range
R L op
Under conditions where maximum ratings
are not exceeded
2to8
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 Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
53096HA(II)/20293TS/9200TA,TS(KOTO)/3050TA,TS(AF) No.3309-1/8
Features
11028125.007.png 11028125.008.png 11028125.009.png 11028125.010.png
LA4425A
Operating Characteristics at Ta = 25°C, V CC = 13.2 V, R L =4
W
,f=1kHz, Rg = 600
W
, specified
board/specified circuit, 30
´
30
´
1.5 mm 3 thick aluminum used
Parameter
Symbol
Conditions
min typ max Unit
Quiescent current
I CCO
65 130 mA
Voltage gain
VG V O = 0 dBm
43 45 47 dB
Output power
P O 1 13.2 V/4 W , THD = 10%
4 5
W
P O 2 14.4 V/4 W , THD = 10%
5 6
W
Total harmonic distortion
THD V O = 2V
0.1 1.0 %
Output noise voltage
V NO Rg = 0, BPF = 20 Hz to 20 kHz
0.15 0.5 mV
SVRR 1
Rg=0,BPF=20Hzto20kHz
V R = 0 dBm, f R = 100 Hz
30 40
dB
Ripple rejection ratio
Rg=0,BPF=20Hzto20kHz
V R = 0 dBm, f R = 1 kHz
SVRR 2
47
dB
Overvoltage attack
V CCX Rg = 0
21.5
V
Starting time
t s
0.35
s
Input resistance
R IN
50
k
W
Roll-off frequency
f L
40
Hz
f H
90
kHz
Thermal operating temperature
Tc
125
°C
Sample Application Circuit
Pd max – Ta
With silicone grease applied.
Heat sink mounting torque 39 N·cm
With infinite heat sink
. On-chip overvoltage protection
With 100
´
100
´
1.5 mm 3 Al heat sink
. On-chip pop noise reducing circuit
. On-chip output D.C. short protection
With 50 ´ 50 ´ 1.5 mm 3
Al heat sink
With 30
´
30
´
1.5 mm 3 Al heat sink
No heat sink
Pin Voltage at V CC = 13.2 V
Ambient temperature, Ta – °C
Characteristics
Input
Small signal
GND
Large signal
GND
Output
V CC
Pin No.
1
2
3
4
5
Pin voltage
(reference value)
( 6 2V BE )
1.4 V
0V
0V
( 6 1/2 V CC )
6.5 V
(V CC )
13.2 V
No.3309-2/8
. On-chip thermal protection
11028125.001.png 11028125.002.png
LA4425A
IC Usage Notes
Maximum ratings
If the IC is used in the vicinity of the maximum ratings, even a slight variation in conditions may cause the maximum ratings to
be exceeded, thereby leading to a breakdown.
Printed circuit board
When drawing the printed circuit pattern, refer to the sample printed circuit pattern. Be careful not to form a feedback loop
between input and output.
Comparison of External Components
External Parts
Our ICs now in use
LA4425A
Output coupling capacitor
j
j
Input coupling capacitor
j
j
Bootstrap capacitor
j
—
Feedback capacitor
j
—
Filter capacitor
j
—
Phase compensation capacitor
j
—
Oscillation correction polyester
film capacitor
j
—
Oscillation correction resistor
j
—
Total
8 pcs.
2 pcs.
Note: The power supply capacitor is not counted as a power IC part.
Sample Printed Circuit Pattern
LA4425A
GND
–
CV = 1000 m F
+
V CC
+ –
–
+
IN
OUT Co = 1000 m F
Ci = 2.2
m
F GND
Cu-foiled side 78.0 ´ 29.0 mm 2
I CCO –V CC
V N –V CC
Supply voltage, V CC –V
Supply voltage, V CC –V
No.3309-3/8
CC
11028125.003.png 11028125.004.png
Current drain, I CC –mA
Total harmonic distortion, THD – %
Response – dB
Ouput power, P O –W
Power dissipation, Pd – W
Current drain, I CC –mA
Output power, P O –W
Total harmonic distortion, THD – %
Total harmonic distortion, THD – %
Power dissipation, Pd – W
11028125.005.png
 
LA4425A
V NO –Rg
SVRR – V CC
BPF=20Hzto20kHz
BPF=20Hzto20kHz
Signal source resistance, Rg – W
Supply voltage, V CC –V
SVRR – V R
SVRR – fR
BPF=20Hzto20kHz
BPF=20Hzto20kHz
Power supply ripple, V R – mVrms
I CCO –Ta
Ripple frequency, f R –Hz
Ambient temperature, Ta – °C
Ambient temperature, Ta – °C
P O –Ta
Switch ‘‘ON’’ locus
Ambient temperature, Ta – °C
0.2 s/div
No.3309-5/8
V N –Ta
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