LA4425A [SANYO]
5 W Power Amplifier with Very Few External Parts for Car Radio and Car Stereo; 5 W功率放大器只需极少的外部零件汽车收音机和汽车音响
| 型号： | LA4425A |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | 5 W Power Amplifier with Very Few External Parts for Car Radio and Car Stereo |
| 文件： | 总8页 (文件大小：162K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number: EN3309C
Monolithic Linear IC
LA4425A
5 W Power Amplifier with Very Few External Parts
for Car Radio and Car Stereo
Features
Package Dimensions
unit : mm
.
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]
3031A-SIP-5H
[LA4425A]
.
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
SANYO : SIP5H
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Maximum supply voltage
V
max
Rg = 0
18
CC
Giant pulse 200 msec
Rise time 1 ms
Surge maximum supply voltage
V
surge
50
V
CC
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
I
peak
3.3
7.5
A
O
Pd max
Topr
With infinite heat sink
W
°C
°C
–30 to +80
–40 to +150
Tstg
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
13.2
Unit
V
Recommended supply voltage
Recommended load resistance
Operating voltage range
V
CC
R
4
Ω
L
V
op
5 to 16
V
CC
Under conditions where maximum ratings
are not exceeded
Operating load resistance range
R
op
2 to 8
Ω
L
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
LA4425A
Operating Characteristics at Ta = 25°C, VCC = 13.2 V, RL = 4 Ω, f = 1 kHz, Rg = 600 Ω, specified
board/specified circuit, 30 × 30 × 1.5 mm3 thick aluminum used
Parameter
Quiescent current
Symbol
Conditions
min
typ
65
max
130
47
Unit
mA
dB
W
I
CCO
VG
Voltage gain
V
= 0 dBm
43
4
45
O
P 1
13.2 V/4 Ω, THD = 10%
14.4 V/4 Ω, THD = 10%
5
O
Output power
P 2
O
5
6
W
Total harmonic distortion
Output noise voltage
THD
V
= 2V
0.1
0.15
1.0
0.5
%
O
V
Rg = 0, BPF = 20 Hz to 20 kHz
mV
NO
Rg = 0, BPF = 20 Hz to 20 kHz
SVRR
SVRR
30
40
47
dB
dB
1
V
= 0 dBm, f = 100 Hz
R
R
Ripple rejection ratio
Rg = 0, BPF = 20 Hz to 20 kHz
= 0 dBm, f = 1 kHz
2
V
R
R
Overvoltage attack
Starting time
V
Rg = 0
21.5
0.35
50
V
s
CCX
t
s
Input resistance
R
kΩ
Hz
kHz
°C
IN
L
f
40
Roll-off frequency
f
90
H
Thermal operating temperature
Tc
125
Sample Application Circuit
Pd max – Ta
With silicone grease applied.
Heat sink mounting torque 39 N·cm
With infinite heat sink
.
With 100 × 100 × 1.5 mm3 Al heat sink
On-chip overvoltage protection
On-chip thermal protection
On-chip pop noise reducing circuit
On-chip output D.C. short protection
.
.
.
With 50 × 50 × 1.5 mm3
Al heat sink
With 30 × 30 × 1.5 mm3 Al heat sink
No heat sink
Ambient temperature, Ta – °C
Pin Voltage at VCC = 13.2 V
Small signal
GND
Large signal
Output
Characteristics
Pin No.
Input
1
V
CC
5
GND
2
3
4
Pin voltage
(reference value)
(6 2 V
)
(6 1/2 V
)
(V
13.2 V
)
CC
BE
1.4 V
CC
0 V
0 V
6.5 V
No.3309-2/8
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
Output coupling capacitor
Input coupling capacitor
Bootstrap capacitor
Our ICs now in use
LA4425A
j
j
j
j
j
j
j
j
—
—
—
—
Feedback capacitor
Filter capacitor
Phase compensation capacitor
Oscillation correction polyester
film capacitor
j
—
Oscillation correction resistor
Total
j
—
8 pcs.
2 pcs.
Note: The power supply capacitor is not counted as a power IC part.
Sample Printed Circuit Pattern
LA4425A
GND
CV
CC
= 1000 µF
–
+
V
CC
+
–
IN
–
+
OUT
Co = 1000 µF
Ci = 2.2 µF GND
Cu-foiled side 78.0 × 29.0 mm2
VN – VCC
ICCO – VCC
Supply voltage, VCC – V
Supply voltage, VCC – V
No.3309-3/8
LA4425A
THD – PO
PO – VIN
Input voltage, VIN – mV
Output power, PO – W
f Response
THD – f
Frequency, f – Hz
Frequency, f – Hz
THD – VCC
PO – VCC
Supply voltage, VCC – V
Supply voltage, VCC – V
ICC, Pd – PO
ICC, Pd – PO
Output power, PO – W
Output power, PO – W
No.3309-4/8
LA4425A
VNO – Rg
SVRR – VCC
BPF = 20 Hz to 20 kHz
BPF = 20 Hz to 20 kHz
Signal source resistance, Rg – Ω
Supply voltage, VCC – V
SVRR – VR
SVRR – fR
BPF = 20 Hz to 20 kHz
BPF = 20 Hz to 20 kHz
Power supply ripple, VR – mVrms
Ripple frequency, fR – Hz
ICCO – Ta
VN – Ta
Ambient temperature, Ta – °C
Ambient temperature, Ta – °C
PO – Ta
Switch ‘‘ON’’ locus
0.2 s/div
Ambient temperature, Ta – °C
No.3309-5/8
LA4425A
V
= 13.2 V/4 Ω
CC
Rg = 0
‘‘OFF’’ locus
GND
0.2 s/div
Instructions and Precautions
.
Connect a capacitor of 1000 pF across pins 1 and 2 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 2 and 3.
.
DUAL Printed Circuit Pattern Example
GND
1
OUT1
IN1
VCC
GND
IN2
1
OUT2
Cu-foiled side 45.0 × 75.0 mm2
.
Short Circuit Tests
Sanyo’s recommended printed circuit board: Apply VCC = 13.2 V using a 30 × 30 × 1.5 mm3 thick aluminum board. 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 VCC ‘‘ON’’
when DC short (SW 1 or SW 2) is on.
.
Power Supply Positive Surge
JASO tester
Application of giant pulse
No.3309-6/8
LA4425A
The overvoltage protector (VCCX 6 21.5 V) inside the IC is used to cut all bias routes and reverse bias between B-E of output
stage elements, in order to increase the power line’s capability of handling positive surge. This means, of course, that a VCES
(VCBO) type output stage element is used instead of the VCEO (VCER) type.
.
Load Resistance and Misoperation
It should be noted that when RL < 2 Ω and VCC is high, and the switch is turned ‘‘ON’’ when setting is for a signal (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 Sanyo’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 +VCC to Output Pin
Floating
The power pin is in a floating state when a power capacitor is connected, so if +VCC touches output lines a and b, the upper
power transistor inside the IC will be damaged.
The LA4425A has a protective bypass route inside the IC.
.
Starting Time (ts)
This is set at 0.35 sec/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 50 kΩ. 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 45 dB inside the IC. It is impossible to change it externally.
Phase compensation capacitors (350 pF/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 × 1.5 mm3 thick Al board
Ta = 25°C
TC(°C)
No.3309-7/8
LA4425A
T.S.D is capable of starting operation at Tc 120 to 130°C. When this is converted to junction temperature (Tj) according to the
formula below.
Tj 6 165°C,
Tj = QjcvPd + 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 (ICC) and power (PO) show a tendency to decrease.
Proper Cares in Mounting Radiator Fin
1. The mounting torque is in the range of 39 to 59 Nvcm.
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 heatsink mounting tab and the heatsink are at the same electric potential as the chip’s GND, care must be taken
when mounting the heatsink 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.
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume
production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use
or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of June, 1996 . Specifications and information herein are subject to change without notice.
No.3309-8/8
相关型号：
LA4425PV
Monolithic Linear IC For Car Radio and Car Stereo 5W Power Amplifier with Very Few External Parts
SANYO
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