LA4425AN-D-E [ONSEMI]
5W Power Amplifier;
| 型号： | LA4425AN-D-E |
| 厂家： | 
ONSEMI |
| 描述： | 5W Power Amplifier 局域网 放大器 商用集成电路 |
| 文件： | 总10页 (文件大小：98K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LA4425AN
Monolithic Linear IC
http://onsemi.com
5W Power Amplifier
with Very Few External Parts
for Car Radio and Car Stereo
Overview
The LA4425AN 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 :
SIP5 9.5x11.8 / SIP5H
- Over-voltage protection
- Thermal protection
- Output D.C. short protection
On-chip pop noise reducing circuit
Specifications
Maximum Ratings at Ta = 25C
Parameter
Symbol
Conditions
Ratings
18
Unit
V
Maximum supply voltage
V
max
Rg = 0
CC
Surge maximum supply
voltage
V
surge
Giant pulse 200ms
Rise time 1ms
50
V
CC
Maximum output current
I
peak
3.3
7.5
A
O
Allowable power dissipation
Operating temperature
Storage temperature
Pd max
Topr
With infinite heat sink
W
C
C
40 to +85
40 to +150
Tstg
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed,
damage may occur and reliability may be affected.
ORDERING INFORMATION
See detailed ordering and shipping information on page 10 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
September 2014 - Rev. 0
1
Publication Order Number :
LA4425AN/D
LA4425AN
Operating Conditions at Ta = 25C,
Parameter
Symbol
Conditions
Ratings
Unit
V
Recommended supply
voltage
V
13.2
4
CC
Recommended load
resistance
R
L
Operating voltage range
V
op
5 to 16
2 to 8
V
CC
op
Operating load resistance
range
R
Under conditions where maximum
ratings are not exceeded
L
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended
Operating Ranges limits may affect device reliability.
Electrical Characteristics at Ta 25C, V
= 13.2V, R = 4, f = 1 kHz, Rg = 600,
CC
L
specified board/specified circuit, 30301.5mm3 thick aluminum used
Ratings
Parameter
Symbol
Conditions
Unit
min
typ
max
130
Quiescent current
Voltage gain
I
65
45
5
mA
dB
W
CCO
V
V
= 0dBm
O
43
4
47
G
Output power
P
1
O
13.2 V / 4, THD = 10%
14.4 V / 4, THD = 10%
P
2
O
5
6
W
Total harmonic distortion
Output noise voltage
Ripple rejection ratio
THD
V
= 2V
0.1
40
40
1.0
%
O
V
Rg = 0, BPF = 20 Hz to 20 kHz
Rg = 0, BPF = 20 Hz to 20 kHz
30
30
dB
dB
NO
SVRR1
V
= 0dBm, f = 100Hz
R
R
SVRR2
Rg = 0, BPF = 20 Hz to 20 kHz
= 0dBm, f = 100 Hz
47
dB
V
R
R
Over-voltage attack
Starting time
V
X
Rg = 0
21.5
0.35
50
V
s
CC
t
S
Input resistance
Roll-off frequency
R
f
k
Hz
kHz
C
IN
40
L
f
90
H
Thermal operating
temperature
Tc
125
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be
indicated by the Electrical Characteristics if operated under different conditions.
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2
LA4425AN
Pd max -- Ta
10
Al heat sink
.
mounting toque 39N cm
with sillicone grease applied.
8
7.5
Infinite heat sink
100×100×1.5mm3
50×50×1.5mm3
30×30×1.5mm3
6
5.7
4.3
4
2.9
2
No heat sink
1.2
0
-30 -20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
Package Dimensions
unit : mm
SIP5 9.5x11.8 / SIP5H
CASE 127AF
ISSUE O
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3
LA4425AN
Sample Application Circuit
V
13.2V
CC
+
5
1000μF
On-chip overvoltage protection
On-chip thermal protection
On-chip pop noise reducing circuit
On-chip output D.C. short protection
Ci 2.2μF
+
1
Co 1000μF
+
LA4425AN
3
4
2
speaker
4Ω
Pin Voltage at V
= 13.2V
CC
Small signal
Large signal
Characteristics
Pin No.
Input
1
Output
4
V
CC
5
GND
2
GND
3
( 2V
BE
1.4V
)
( 1/2V
)
(V
)
CC
Pin voltage
(reference value)
CC
6.5V
0V
0V
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
Our ICs now in use
LA4425AN
-
-
-
Phase compensation
capacitor
-
-
Oscillation correction
polyester film capacitor
Oscillation correction
resistor
-
Total
8 pcs.
2 pcs.
Note: The power supply capacitor is not counted as a power IC part.
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4
LA4425AN
Sample Printed Circuit Pattern
LA4425AN
GND
CV =1000μF
−
+
5
1
CC
V
CC
+
−
IN
−
+
OUT Co=1000μF
Ci=2.2μF GND
Cu-foiled side 78.0 29.0mm2
I
-- V
CC
V
-- V
CC
CCO
N
12
10
8
100
80
60
40
20
0
R =4Ω
R =4Ω
L
L
Rg=0
Rg=0
6
4
2
0
0
2
4
6
8
10 12 14 16 18 20 22 24
0
2
4
6
8
10 12 14 16 18 20 22 24
Supply voltage, V
CC
-- V
Supply voltage, V
-- V
CC
P
-- V
THD -- P
O
IN
O
10
10
V
=13.2V
7
V
=13.2V
CC
CC
7
R =4Ω
R =4Ω
5
L
L
5
f=1kHz
f=1kHz
3
2
Rg=600Ω
Rg=600Ω
3
2
1.0
7
5
1.0
7
5
3
2
3
2
0.1
7
5
0.1
3
7
5
2
5
7
2
3
5
7
2
3
5
7
2
3
5
7
2
3
5
7
1.0
0.1
1.0
10
10
100
Input voltage, V -- mV
IN
Output power, P -- W
O
f Response
THD -- f
1
0
3
2
V
=13.2V
CC
R =4Ω
L
Rg=600Ω
-1
V =2V(P =1W)
O
O
1.0
-2
-3
7
5
f
f
H
L
-4
3
2
-5
-6
-7
0.1
V
=13.2V
CC
-8
7
5
R =4Ω
L
Rg=600Ω
-9
V =0dBm
O
-10
10
3
2
3
5
2
3
5
2
3
5
2
3
5
3
5
7
2
3
5
7
2
3
5
7
2
3
100
1k
10k
100k
100
1k
10k
Frequency, f -- Hz
Frequency, f -- Hz
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5
LA4425AN
THD -- V
CC
P
-- V
O
CC
5
12
f=1kHz
R =4Ω
R =2Ω
L
L
Rg=600Ω
f=1kHz
3
2
THD=10%
V =2V(P =1W)
O
O
10
8
Rg=600Ω
R =4Ω
L
1.0
7
5
6
3
2
4
2
0.1
7
5
0
6
8
10
12
14
16
18
20
8
10
12
14
16
18
20
Supply voltage, V
CC
-- V
Supply voltage, V -- V
CC
I
, Pd -- P
I
, Pd -- P
CC
O
CC O
700
600
500
400
300
200
100
0
7
1200
1000
800
600
400
200
0
R =2Ω
R =4Ω
L
I
CC
L
f=1kHz
f=1kHz
I
6
5
4
3
2
1
0
Rg=600Ω
CC
Rg=600Ω
10
8
6
4
2
0
V
=16V
CC
V
=16V
CC
V
=13.2V
CC
V
=13.2V
CC
7
2
3
5
7
2
3
5
7
7
2
3
5
7
2
3
5
7
2
0.1
1.0
10
0.1
1.0
10
Output power, P -- W
Output power, P -- W
O
O
V
-- Rg
SVRR -- V
CC
NO
50
40
30
20
10
0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
V
L
=13.2V
CC
R =4Ω
BPF=20Hz to 20kHz
Rg=0→0.12mV
R =4Ω
L
V =0dBm
R
f =100Hz
R
Rg=0
BPF=20Hz to 20kHz
7
2
3
5
7
2
3
5
7
2
8
9
10
11
12
13
14
15
16
17
18
19
1k
10k
100k
Signal source resistance, Rg -- Ω
Supply voltage, V
-- V
CC
SVRR -- V
SVRR -- f
R
R
50
40
30
20
10
0
50
40
30
20
10
0
V
=13.2V
V
=13.2V
CC
CC
L
R =4Ω
R =4Ω
L
Rg=0
f =100Hz
R
V =0dBm
Rg=0
R
BPF=20Hz to 20kHz
BPF=20Hz to 20kHz
0
200
400
600
800
1000
1200
0
5
7
2
3
5
7
2
100
1k
Power supply ripple, V -- mVrms
Ripple frequency, f -- Hz
R
R
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6
LA4425AN
I
-- Ta
V
-- Ta
N
CCO
80
60
40
20
0
10
V
=13.2V
V
=13.2V
CC
CC
R =4Ω
R =4Ω
L
L
Rg=0
Rg=0
8
6
4
2
0
-60
-40
-20
0
20
40
60
80
100
-60
-40
-20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
Ambient temperature, Ta -- °C
P
-- Ta
O
6
5
4
3
2
1
V
=13.2V
V
=13.2V/4Ω
CC
CC
R =4Ω
Rg=0
L
f=1kHz
Switch"ON"locus
THD=10%
t
s
GND
0
-60
-40
-20
0
20
40
60
80
100
0.2s/div
Ambient temperature, Ta -- °C
V
=13.2V/4Ω
CC
Rg=0
"OFF"locus
GND
0.2s/div
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7
LA4425AN
Instructions and Precautions
Connect a capacitor of 1000pF across pins and for external disturbance path.
Be careful of the ground line artwork when laying out the printed circuit pattern. Arrange so that the Sg route and load
current flow-in route do not overlap. Refer to the recommended printed circuit pattern or make slits, etc. at pins
and .
DUAL Printed Circuit Pattern Example
GND
OUT1
1
IN1
V
GND
IN2
CC
1
OUT2
Cu-foiled side 45.0×75.0mm2
Short Circuit Tests
+
SW1
SW2
SW3
+
13.2V
+
LA4425AN
SW4
Our company's recommended printed circuit board: Apply V =13.2V using a 30301.5mm3 thick aluminum board.
CC
The IC will be protected from the DC/AC shorting of switches 1 to 4 above. However, be careful not to damage the IC
by turning V
”ON” when DC short (SW 1 or SW 2) is on.
CC
Power Supply Positive Surge
JASO tester
Application of giant pulse
2.2μF
+
0.15μF
13.2V
+
Rg
620Ω
LA4425AN
1000μF
R
L
The over-voltage protector (V X 21.5V) inside the IC is used to cut all bias routes and reverse bias between B-E of
CC
output stage elements, in order to increase the power line’s capability of handling positive surge. This means, of course,
that a V
(V
) type output stage element is used instead of the V (V ) type.
CEO CER
CES CBO
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8
LA4425AN
Load Resistance and Misoperation
It should be noted that when R 2 and V
is high, and the switch is turned “ON” when setting is for a signal
CC
L
(THD = 10%), the ground detector (current voltage Schmitt circuit) operates momentarily.
Precautions on TaB
If power voltage is applied to the IC substrate (the heat sink on a set), the IC structure is such that the PN junctions
may be burned, causing deterioration or destruction. Consult Our company’s Quality Assurance Department with
regard to the energy handling capability (voltage peak value, pulse width). Also, the IC TaB (substrate) is connected
to pin 3, large signal GND.
Test of +V
to Output Pin
CC
Floating
+
+
b
+
LA4425AN
a
13.2V
The power pin is in a floating state when a power capacitor is connected, so if +V
touches output lines a and b , the
CC
upper power transistor inside the IC will be damaged.
The LA4425AN has a protective bypass route inside the IC.
Starting Time (t )
s
This is set at 0.35sec/typ, but it can be made shorter by making input capacitor Ci smaller, or longer by making it
larger.
Pop noise
The pop noise prevention circuit operates to reduce pop until Rg reaches 50k. However, if Rg is left open, the
charging route of input capacitor Ci is lost, so the pop noise reduction circuit stops operating and click noises become
louder.
VG/OSC
The voltage gain is fixed at 45dB inside the IC. It is impossible to change it externally.
Phase compensation capacitors (350pF/total) are connected between individual stages inside the IC, and the open
loop gain is low. In addition, the upper and lower drives are made equivalent so that final stage current gain is
adjusted, providing a measure against unwanted high-frequency parasitic oscillation peculiar to power IC’s.
BTL Connection
Connection is impossible with IC alone.
Reverse Mounting of IC
The pin assignment is such that there is no danger of damage.
T.S.D (Thermal Shutdown) Operating Temperature
30×30×1.5mm3 thick Al board
Ta=25°C
0
20
40
60
80 100 120 140 160 180
Tc (°C)
T.S.D is capable of starting operation at Tc 120 to 130C. When this is converted to junction temperature (Tj) according
to the formula below.
Tj 165C,
.
Tj = Qjc Pd + Tc
As T.S.D operation progresses, the output pin bias voltage drops, and it becomes harder to drive the upper waveform.
Therefore, the current (I ) and power (P ) show a tendency to decrease.
CC
O
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9
LA4425AN
Proper Cares in Mounting Radiator Fin
.
1. The mounting torque is in the range of 1. The mounting torque is in the range of 39 to 59 N cm.
2. The distance between screw holes of the radiator fin must coincide with the distance between screw holes of the IC.
3. The screw to be used must have a head equivalent to the one of truss machine screw or binder machine screw
defined by JIS. Washers must be also used to protect the IC case.
4. No foreign matter such as cutting particles shall exist between heat sink and radiator fin. When applying grease on
the junction surface, it must be applied uniformly on the whole surface.
5. Because the heat sink mounting tab and the heat sink are at the same electric potential as the chip’s GND, care must
be taken when mounting the heat sink on more than one device.
6. IC lead pins are soldered to the printed circuit board after the radiator fin is mounted on the IC.
ORDERING INFORMATION
Device
Package
Shipping (Qty / Packing)
50 / Fan-Fold
SIP5 9.5x11.8 / SIP5H
(Pb-Free)
LA4425AN-D-E
ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiariesin the United States
and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of
SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without
further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitabilityof its products for any particular purpose,
nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including
without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can
and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each
customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are
not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applicationsintended to support or
sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers,
employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of,
directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was
negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all
applicable copyright laws and is not for resale in any manner.
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10
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