5 W Power Amplifier with Very Few External Parts
for Car Radio and Car Stereo
Features
.
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]
.
Almost no evaluation, adjustment and check of its functions
as a power IC required
[Simplified control]
.
Wide operation supply range
5 to 16 V
.
On-chip protection:
Overvoltage protection
Thermal protection
Output D.C. short protection
.
On-chip pop noise reducing circuit
Package Dimensions
unit : mm
3031A-SIP-5H
[LA4425A]
SANYO : SIP5H
Specifications
Maximum Ratings
at Ta = 25C
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 = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
13.2
V
Recommended load resistance
R
L
4
Operating voltage range
V
CC
op
5 to 16
V
Operating load resistance range
R
L
op
Under conditions where maximum ratings
are not exceeded
2 to 8
Ordering number: EN3309C
Monolithic Linear IC
LA4425A
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
53096HA(II)/20293TS/9200TA,TS(KOTO)/3050TA,TS(AF) No.3309-1/8
Operating Characteristics
at Ta = 25C, V
CC
= 13.2 V, R
L
= 4
, f = 1 kHz, Rg = 600
, 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
, THD = 10%
4
5
W
P
O
2
14.4 V/4
, 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
Ripple rejection ratio
SVRR
1
Rg = 0, BPF = 20 Hz to 20 kHz
V
R
= 0 dBm, f
R
= 100 Hz
30
40
dB
SVRR
2
Rg = 0, BPF = 20 Hz to 20 kHz
V
R
= 0 dBm, f
R
= 1 kHz
47
dB
Overvoltage attack
V
CCX
Rg = 0
21.5
V
Starting time
t
s
0.35
s
Input resistance
R
IN
50
k
Roll-off frequency
f
L
40
Hz
f
H
90
kHz
Thermal operating temperature
Tc
125
C
Sample Application Circuit
.
On-chip overvoltage protection
.
On-chip thermal protection
.
On-chip pop noise reducing circuit
.
On-chip output D.C. short protection
Pin Voltage
at V
CC
= 13.2 V
Characteristics
Input
Small signal
GND
Large signal
GND
Output
V
CC
Pin No.
1
2
3
4
5
Pin voltage
(reference value)
(
6
2 V
BE
)
1.4 V
0 V
0 V
(
6
1/2 V
CC
)
6.5 V
(V
CC
)
13.2 V
Pd max Ta
Allowable
Power
Dissipation,
Pd
max
W
With silicone grease applied.
Heat sink mounting torque 39 Ncm
With infinite heat sink
With 100
100
1.5 mm
3
Al heat sink
With 50
50
1.5 mm
3
Al heat sink
With 30
30
1.5 mm
3
Al heat sink
No heat sink
Ambient temperature, Ta C
LA4425A
No.3309-2/8
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
+
IN
Ci = 2.2
F GND
+
+
GND
CV
= 1000
F
CC
V
CC
OUT
Co = 1000
F
Cu-foiled side 78.0
29.0 mm
2
Quiescent
current,
I
CCO
m
A
I
CCO
V
CC
Supply voltage, V
CC
V
Output
pin
voltage,
V
N
V
V
N
V
CC
Supply voltage, V
CC
V
LA4425A
No.3309-3/8
Ouput
power
,
P
O
W
P
O
V
IN
Input voltage, V
IN
mV
T
otal
harmonic
distortion,
THD
%
THD P
O
Output power, P
O
W
Response
d
B
f Response
Frequency, f Hz
T
otal
harmonic
distortion,
THD
%
THD f
Frequency, f Hz
T
otal
harmonic
distortion,
THD
%
THD V
CC
Supply voltage, V
CC
V
Output
power
,
P
O
W
P
O
V
CC
Supply voltage, V
CC
V
Current
drain,
I
CC
m
A
I
CC
, Pd P
O
Output power, P
O
W
Power
dissipation,
Pd
W
Current
drain,
I
CC
m
A
I
CC
, Pd P
O
Output power, P
O
W
Power
dissipation,
Pd
W
LA4425A
No.3309-4/8
Output
noise
voltage
,
V
NO
m
V
V
NO
Rg
BPF = 20 Hz to 20 kHz
Signal source resistance, Rg
Ripple
rejection
ratio,
SVRR
d
B
SVRR V
CC
BPF = 20 Hz to 20 kHz
Supply voltage, V
CC
V
Ripple
rejection
ratio,
SVRR
d
B
SVRR V
R
BPF = 20 Hz to 20 kHz
Power supply ripple, V
R
mVrms
Ripple
rejection
ratio,
SVRR
d
B
SVRR fR
BPF = 20 Hz to 20 kHz
Ripple frequency, f
R
Hz
Quiescent
current,
I
CCO
m
A
I
CCO
Ta
Ambient temperature, Ta C
Output
pin
voltage,
V
N
V
V
N
Ta
Ambient temperature, Ta C
Output
power
,
P
O
W
P
O
Ta
Ambient temperature, Ta C
2
V/div
Switch ``ON'' locus
0.2 s/div
LA4425A
No.3309-5/8
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