Ordering number : EN3309D
Monolithic Linear IC
LA4425A
Overview
For Car Radio and Car Stereo
5W Power Amplifier
with Very Few External Parts
The LA4425A is a 5W 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 and simplified control
Functions
•
Wide operation supply range
→
5 to 16V
•
On-chip protection:
- Over-voltage protection
- Thermal protection
- Output D.C. short protection .
•
On-chip pop noise reducing circuit
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Surge maximum supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
VCC surge
IO peak
Pd max
Topr
Tstg
With infinite heat sink
Rg = 0
Giant pulse 200ms
Rise time 1ms
3.3
7.5
-30 to +80
-40 to +150
A
W
°C
°C
Conditions
Ratings
18
50
Unit
V
V
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.
53007 MS PC/53096HA(II)/20293TS/9200TA,TS(KOTO)/3050TA,TS(AF) No.3309-1/9
LA4425A
Operating Conditions
at Ta = 25°C,
Parameter
Recommended supply voltage
Recommended load resistance
Operating voltage range
Operating load resistance range
Symbol
VCC
RL
VCC op
RL op
Under conditions where maximum ratings are
not exceeded
Conditions
Ratings
13.2
4
5 to 16
2 to 8
Unit
V
Ω
V
Ω
Electrical Characteristics
at Ta
=
25°C, VCC = 13.2V, RL = 4Ω, f = 1 kHz, Rg = 600Ω,
specified board/specified circuit, 30×30×1.5mm
3
thick aluminum used
Parameter
Quiescent current
Voltage gain
Output power
Symbol
ICCO
VG
PO1
PO2
Total harmonic distortion
Output noise voltage
Ripple rejection ratio
THD
VNO
SVRR1
VO = 0dBm
13.2 V / 4Ω, THD = 10%
14.4 V / 4Ω, THD = 10%
VO = 2V
Rg = 0, BPF = 20 Hz to 20 kHz
Rg = 0, BPF = 20 Hz to 20 kHz
VR = 0dBm, fR = 100Hz
SVRR2
Rg = 0, BPF = 20 Hz to 20 kHz
VR = 0dBm, fR = 100 Hz
Over-voltage attack
Starting time
Input resistance
Roll-off frequency
VCCX
tS
RIN
fL
fH
Thermal operating temperature
Tc
Rg = 0
21.5
0.35
50
40
90
125
V
s
kΩ
Hz
kHz
°C
47
dB
30
30
43
4
5
Conditions
min
Ratings
typ
65
45
5
6
0.1
40
40
1.0
max
130
47
mA
dB
W
W
%
dB
dB
Unit
Package Dimensions
unit : mm (typ)
3031C
10
Pd max -- Ta
Al heat sink
mounting toque 39N.cm
with sillicone grease applied.
9.5
3.2
(2.0)
2.7
Allowable power dissipation, Pd max -- W
8
7.5
Infinite heat sink
100×100×1.5mm
3
50×50×1.5mm
3
12
°
C
/
W
(2.0)
14.25max
(11.8)
6
5.7
4.3
4
2.9
2
1.2
10.0
30×30×1.5mm
3
No heat sink
0.51min
1.1
1.5
13.0
0
-30 -20
0
20
40
60
80
100
Ambient temperature, Ta --
°C
1
(0.75)
2.0
5
0.6
0.5
1.2
SANYO : SIP5H
No.A0195-2/9
LA4425A
Sample Application Circuit
VCC 13.2V
Ci 2.2µF
+
5
+
1000µF
Co 1000µF
1
LA4425A
2
3
4
+
•
On-chip overvoltage protection
•
On-chip thermal protection
•
On-chip pop noise reducing circuit
•
On-chip output D.C. short protection
speaker
4Ω
Pin Voltage
at VCC = 13.2V
Characteristics
Pin No.
Pin voltage
(reference value)
Input
1
(≈ 2VBE)
1.4V
Small signal
GND
2
0V
Large signal
GND
3
0V
Output
4
(≈ 1/2VCC)
6.5V
VCC
5
(VCC)
13.2V
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
Output coupling capacitor
Input coupling capacitor
Bootstrap capacitor
Feedback capacitor
Filter capacitor
Phase compensation capacitor
Oscillation correction polyester
film capacitor
Oscillation correction resistor
Total
8 pcs.
-
-
-
-
-
-
2 pcs.
Our ICs now in use
LA4425A
Note: The power supply capacitor is not counted as a power IC part.
No.A0195-3/9
LA4425A
Sample Printed Circuit Pattern
LA4425A
GND
−
+
CVCC=1000µF
5
1
VCC
+
−
+
−
IN
Ci=2.2µF GND
Cu-foiled side 78.0×29.0mm
2
OUT
Co=1000µF
100
ICCO -- VCC
RL=4Ω
Rg=0
12
VN -- VCC
RL=4Ω
Rg=0
Quiescent current, ICCO -- mA
10
Output pin voltage, VN -- V
2
4
6
8
10
12
14
16
18
20
22
24
80
8
60
6
40
4
20
2
0
0
0
0
2
4
6
8
10
12
14
16
18
20
22
24
Supply voltage, VCC -- V
10
7
5
3
2
Supply voltage, VCC -- V
10
7
PO -- VIN
Total harmonic distortion, THD -- %
THD -- PO
VCC=13.2V
RL=4Ω
f=1kHz
Rg=600Ω
VCC=13.2V
RL=4Ω
f=1kHz
Rg=600Ω
5
3
2
Output power, PO -- W
1.0
7
5
3
2
0.1
7
5
3
2
1.0
1.0
7
5
3
2
0.1
7
5
5
2
3
5
7
10
2
3
5
7
100
7
0.1
2
3
5
7
1.0
2
3
5
7
10
Input voltage, VIN -- mV
Output power, PO -- W
f Response
1
0
-1
-2
3
2
THD -- f
Total harmonic distortion, THD -- %
1.0
7
5
3
2
VCC=13.2V
RL=4Ω
Rg=600Ω
VO=2V(PO=1W)
Response -- dB
-3
-4
-5
-6
-7
-8
-9
-10
10
2 3
fL
fH
0.1
7
5
3
3
5
7 100
2
3
5
7 1k
2
3
5
7 10k
2
3
VCC=13.2V
RL=4Ω
Rg=600Ω
VO=0dBm
5
100
2 3
5
1k
2 3
5
10k
2 3
5 100k
Frequency, f -- Hz
Frequency, f -- Hz
No.A0195-4/9
LA4425A
5
THD -- VCC
RL=4Ω
f=1kHz
VO=2V(PO=1W)
Rg=600Ω
Output power, PO -- W
12
PO -- VCC
f=1kHz
Rg=600Ω
THD=10%
RL=2Ω
Total harmonic distortion, THD -- %
3
2
10
RL=4Ω
8
1.0
7
5
3
2
6
4
0.1
7
5
6
2
8
10
12
14
16
18
20
0
8
10
12
14
16
18
20
Supply voltage, VCC -- V
700
Supply voltage, VCC -- V
7
1200
ICC, Pd -- PO
RL=4Ω
f=1kHz
Rg=600Ω
ICC
ICC, Pd -- PO
RL=2Ω
f=1kHz
Rg=600Ω
ICC
10
600
6
1000
Power dissipation, Pd -- W
500
5
400
VCC=16V
800
8
4
600
VCC=16V
6
300
VCC=13.2V
3
400
200
2
VCC=13.2V
4
100
1
200
2
0
7
0.1
2
3
5
7
1.0
2
3
5
7
0
10
0
7 0.1
2
3
5
7 1.0
2
3
5
7
10
0
2
Output power, PO -- W
1.0
0.9
Output power, PO -- W
50
VNO -- Rg
Ripple rejection ratio, SVRR -- dB
SVRR -- VCC
Output noise voltage, VNO -- mV
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
7
VCC=13.2V
RL=4Ω
BPF=20Hz to 20kHz
Rg=0→0.12mV
40
30
20
10
RL=4Ω
VR=0dBm
fR=100Hz
Rg=0
BPF=20Hz to 20kHz
9
10
11
12
13
14
15
16
17
18
19
1k
2
3
5
Signal source resistance, Rg --
Ω
7 10k
2
3
5
7 100k
2
0
8
Supply voltage, VCC -- V
50
50
SVRR -- VR
Ripple rejection ratio, SVRR -- dB
SVRR -- fR
Ripple rejection ratio, SVRR -- dB
40
40
30
30
20
20
10
0
0
VCC=13.2V
RL=4Ω
fR=100Hz
Rg=0
BPF=20Hz to 20kHz
200
400
600
800
1000
1200
10
VCC=13.2V
RL=4Ω
Rg=0
VR=0dBm
BPF=20Hz to 20kHz
5
7
100
2
3
5
7
1k
2
0
0
Power supply ripple, VR -- mVrms
Ripple frequency, fR -- Hz
No.A0195-5/9
Power dissipation, Pd -- W
Current drain, ICC -- mA
Current drain, ICC -- mA
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