LA4450F-E [ONSEMI]
Power Amplifier;
| 型号： | LA4450F-E |
| 厂家： | 
ONSEMI |
| 描述： | Power Amplifier |
| 文件： | 总8页 (文件大小：134K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : EN4090E
LA4450
Monolithic Linear IC
2-Channel, 26V, Power Amplifier
for Bus and Track in Car Stereo
http://onsemi.com
Overview
The LA4450 is a single package 2-channel power Amplifier that supports an operating voltage of 26V. It is particularly
well suited for use as the bus and track power IC in car stereo applications. Additionally, since the LA4450 can drive 4
loads, it can be used effectively in high-power high-end products. Furthermore, since it supports a high operating
voltage and has low distortion, it is also optimal for use in TV and home audio products.
Features
Two channels in a single package
P = 12W2 (V
= 26.4V, R = 8, THD = 10%)
= 26.4V, R = 4, THD = 10%)
L
O
CC
CC
L
P = 20W2 (V
O
Can drive 4 speakers
Built-in standby switch
Minimizes impulse noises
Functions
Standby switch (active on high (+5V) input)
On-chip impulse noise protection circuit
On-chip thermal protection circuit
On-chip overvoltage and surge protection circuits
SIP14 36.8x13.8 / SIP14H
Specifications
Maximum Ratings at Ta = 25C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
max
Conditions
Rg = 0 (no signal)
Ratings
Unit
V
V
I
37
4
CC
peak
A
O
Pd max
Topr
Infinite heat sink*
25
W
35 to 80
40 to 150
C
C
Tstg
Note : * Set V
CC
and R within ranges that do not cause Pd max to exceed 25W.
L
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.
Operating Conditions at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
V
Recommended supply voltage
Recommended load resistance
Operating supply voltage range
V
26.4
8
CC
R
L
V
op
10 to 30
V
CC
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.
ORDERING INFORMATION
See detailed ordering and shipping information on page 8 of this data sheet.
Semiconductor Components Industries, LLC, 2013
July, 2013
D1912NK Pd B8-0618/91708 MS JK/43098HA(OT)/10794TS/1102 No.4090-1/8
LA4450
Electrical Characteristics at Ta = 25C, V
= 26.4V, R = 8, f = 1kHz, Rg = 600
CC
L
Ratings
typ
Parameter
Symbol
Conditions
min
Unit
max
Standby current
Ist
I
Standby switch off
Rg = 0
1
30
A
mA
W
Quiescent current
Output power
50
10
80
12
140
CCO
P
P
THD = 10%
O1
O2
THD = 10%, R = 4
20
W
L
Voltage gain
VG
V
P
= 0dBm
= 1W
49
51
53
0.4
1.0
dB
%
O
Total harmonic distortion
Output noise voltage
Ripple exclusion ratio
Channel separation
Standby control voltage
THD
0.07
0.4
55
O
V
Rg = 0, BPF-BW = 20Hz to 20kHz
Rg = 0, f = 100Hz, V = 0dBm
mV
dB
dB
V
NO
SVRR
CHsep
Vst
45
45
R
R
V
= 0dBm, Rg = 10k
55
O
With a 10k resistor connected at pin 12
2.5
V
CC
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.
Pd max -- Ta
32
Using silicon grease
Heat sink attached with
a torque of 39N cm
28
Infinite heat sink
25
24
200
100
x
x
200
100
x
x
1.5mm3Al
21
20
16
1.5mm3Al
12
11
8
50
x 50 x
1.5mm3Al
5
4
3.5
Independent IC
0
0
20
40
60
80
100
120
140
160
-35 -20
Ambient temperature, Ta -- °C
No.4090-2/8
LA4450
Package Dimensions
unit : mm
SIP14 36.8x13.8 / SIP14H
CASE 127AQ
ISSUE A
GENERIC
MARKING DIAGRAM*
XXXXXXXXXX
YMDDD
XXXXX = Specific Device Code
Y = Year
M = Month
DDD = Additional Traceability Data
*This information is generic. Please refer to
device data sheet for actual part marking.
No.4090-3/8
LA4450
Test Circuit
V
=26.4V
CC
+
+
100μF
1000μF
10
7
DC
V
CC
47μF
+
BS1
6
5
IN1
1000μF
+
9
8
+
IN1
CH1
R =8Ω
L
OUT1
*
−
0.15μF
2.2Ω
NF1
+
100μF
CH1
PWR
GND
4
3
LA4450
CH2
PWR
GND
PRE
GND
11
47μF
+
BS2
1
2
IN2
1000μF
+
13
14
+
IN2
CH2
R =8Ω
L
*
OUT2
−
0.15μF
2.2Ω
NF2
+
100μF
ST
12
OFF
ON
*Polyester Film Capacitor
10kΩ
+
5V
1. Features and Usage Notes
Pin 12 is the standby pin. The IC operates when a voltage of 2V or higher is applied through the external resistor R1.
Note that the maximum influx current to pin 12 is 500A.
Changing the voltage gain
The voltage gain VG can be lowered by connecting an
external resistor in series between the NF pin (pins 8 and 14)
and C
IN
NF
+
.
OUT
NF
75Ω
−
30k
75R
VG = 20log
R
Nf’
NF
Nf ’
+
30KΩ
C
However, since the IC may oscillate if VG is 30dB or lower,
use a VG of 36dB or higher.
The LA4450 includes a thermal protection circuit to prevent damage to or destruction of the IC due to abnormal
overheating. As a result, the output may be attenuated or cut off if the application heat sinking is inadequate.
The LA4450 includes an overvoltage protection circuit to protect the IC against power supply surges and abnormal
voltages. This circuit has hysteresis characteristics : it operates at between 39 and 40V, and recovers at around 34V.
Although the LA4450 includes a current limiter circuit to prevent damage due to abnormal currents, care must still be
exercised to prevent load shorts and other excessive current conditions.
No.4090-4/8
LA4450
Application Circuit Example
26.4V
+
+
C1 100μF/35V
C10
1000μF/35V
DC
V
CC
10
7
Ripple filter,
impulse noise
prevention circuit
BS1
+
47μF/35V
IN1
Current limiter circuit
6
5
9
8
+
C9
1000μF/35V
+
IN1
CH1
−
NF1
C8
C7
R3
0.15μF
2.2Ω
OUT1
R =8Ω
L
75Ω
+
C2
100μF
4
3
6.3V
30kΩ
Power ground
Power ground
Thermal
Bias
circuit
Overvoltage
protection circuit
shutdown
protection
circuit
Pre-ground
IN2
11
Current limiter circuit
13
+
OUT2
1000μF/35V
+
IN2
CH2
2
1
NF2
C5
C6
0.15μF
C4
−
R =8Ω
L
14
R2 2.2Ω
75Ω
+
+
BS2
47μF
C3
100μF
6.3V
35V
30kΩ
Standby switch
12
ST
10kΩ
R1
OFF
ON
+
C6, C7: 0.15μF ......mylar capacitors
5V
No.4090-5/8
LA4450
Printed Circuit Board Pattern Example
1
R1
+
+
C4
C9
+
+
+
C6
C7
C1
C2
C3
+
C10
IN1
GND IN2
ST
+
+
C5
C8
R2
R3
OUT 2
OUT 1
GND
Copper foiled side 90×100mm2
P
-- V
P
-- V
CC
O
CC
O
5
5
f = 1kHz
f = 1kHz
VG = 51dB
Rg = 600Ω
THD = 10%
VG = 51dB
Rg = 600Ω
THD = 10%
3
2
3
2
R
= 8Ω
R
= 4Ω
L
L
10
10
7
5
7
5
3
2
3
2
1.0
1.0
7
5
7
5
10
14
18
22
26
30
34
38
10
14
18
22
26
30
34
38
Supply voltage, V
CC
-- V
Supply voltage, V
-- V
CC
THD -- P
THD -- P
O
O
2
2
V
R
= 26.4V
= 8Ω
V
R
= 26.4V
= 4Ω
CC
L
CC
L
10
7
5
10
7
5
VG = 51dB
Rg = 600Ω
VG = 51dB
Rg = 600Ω
3
2
3
2
1.0
1.0
7
5
7
5
3
2
3
2
0.1
0.1
7
5
7
5
3
2
3
2
7
2
3
5
7
2
3
5
7
2
3
7
2
3
5
7
2
3
5
7
2
3
0.1
1.0
10
0.1
1.0
10
Output power, P -- W
Output power, P -- W
O
O
No.4090-6/8
LA4450
SVRR -- f
f Response
R
0
-10
-20
2
V
R
= 26.4V
V
= 26.4V
CC
= 8Ω
CC
Rg = 0
= 8Ω
0
-2
-4
L
R
Rg = 600Ω
L
VG = 51dB converted to 0dB.
VG = 51dB
= 0dBm
V
CCR
-30
-40
-6
-8
-10
-50
-60
-70
-80
-12
-14
-16
-18
2
3
5 7
2
3
5 7
2
3
5 7
2
3
5 7
7
2
3
5
7
2
3
5
7
10k
2
3
5
100
1k
10k
100k
100
1k
Frequency, f -- Hz
Ripple frequency, f -- Hz
R
I
-- V
SVRR -- V
CCO
CC
CCR
140
120
100
0
-10
-20
R
= 8Ω
V
= 26.4V
L
CC
Rg = 0
R
= 8Ω
L
Rg = 0
VG = 51dB
f
= 100Hz
R
80
60
-30
-40
40
20
0
-50
-60
-70
-80
-20
0
4
8
12
16
20
24
28
32
36
40
44
0
6
5
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
Supply voltage, V
-- V
Ripple voltage, V
CCR
-- Vrms
CC
V
-- V
SEP -- f
NO
CC
-30
1.0
0.8
0.6
0.4
0.2
0
V
R
= 26.4V
VG = 51dB
= 8Ω
CC
R
= 8Ω
L
L
BPF = 20Hz to 20kHz
Rg = 10kΩ
= 0dBm
-40
-50
-60
-70
-80
V
O
Rg = 10kΩ
Rg = 0
-0.2
2
3
5
7
2
3
5
7
2
3
5
7
2
3
5 7
100k
10
14
18
22
26
30
34
38
42
100
1k
10k
Supply voltage, V
-- V
Frequency, f -- Hz
CC
V
-- Rg
Pd -- P
O
NO
1.2
1.0
0.8
0.6
0.4
0.2
3
2
V
R
= 26.4V
f = 1kHz
= 8Ω (dual)
CC
R
= 8Ω
L
L
BPF = 20Hz to 20kHz/--3dB
VG = 51dB
10
7
5
3
2
0
7
2
3
5
7
2
3
5
7
2
7
2
3
5
7
2
3
5
7
10
2
3
1k
10k
100k
0.1
1.0
Signal Source Resistance, Rg -- Ω
Output power, P -- W
O
No.4090-7/8
LA4450
Pd -- P
P
-- Ta
O
O
5
5
f = 1kHz
= 4Ω (dual)
R
L
3
2
3
2
R
= 4Ω
L
8Ω
10
10
7
5
7
5
3
2
V
= 26.4V
CC
f = 1kHz
3
2
THD = 10%
Rg = 600Ω
1.0
-40
7
2
3
5
7
2
3
5
7
2
3
-20
0
20
40
60
80
100
0.1
1.0
10
Output power, P -- W
Ambient temperature, Ta -- °C
O
V
-- Ta
N
20
18
16
14
Rg = 0
35V
26.4V
11V
12
10
8
6
4
2
0
-40
-20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
ORDERING INFORMATION
Device
Package
Shipping (Qty / Packing)
15 / Fan-Fold
SIP14 36.8x13.8 / SIP14H
(Pb-Free)
LA4450-E
SIP14 36.8x13.8 / SIP14H
(Pb-Free)
LA4450F-E
LA4450L-E
14 / Fan-Fold
15 / Fan-Fold
SIP14 36.8x13.8 / SIP14H
(Pb-Free)
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application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental
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performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts.
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PS No.4090-8/8
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