LA4450 D

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
 PO = 12W2 (VCC = 26.4V, RL = 8, THD = 10%)
 PO = 20W2 (VCC = 26.4V, RL = 4, THD = 10%)
 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 = 25C
Parameter
Symbol
Maximum supply voltage
VCC max
Maximum output current
IO peak
Conditions
Ratings
Rg = 0 (no signal)
Infinite heat sink*
Unit
37
V
4
A
Allowable power dissipation
Pd max
25
W
Operating temperature
Topr
35 to 80
C
Storage temperature
Tstg
40 to 150
C
Note : * Set VCC and RL within ranges that do not cause Pd max to exceed 25W.
(When VCC is 37V, RL should be 6 or larger and when VCC is 35V, RL should be 4 or larger.)
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 = 25C
Parameter
Symbol
Recommended supply voltage
VCC
Recommended load resistance
RL
Operating supply voltage range
VCC op
Conditions
Ratings
Unit
26.4
V
8

10 to 30
V
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 = 25C, VCC = 26.4V, RL = 8, f = 1kHz, Rg = 600
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
1
30
A
80
140
mA
Standby current
Ist
Standby switch off
Quiescent current
ICCO
Rg = 0
50
Output power
PO1
THD = 10%
10
PO2
THD = 10%, RL = 4
Voltage gain
VG
VO = 0dBm
Total harmonic distortion
THD
PO = 1W
Output noise voltage
VNO
Rg = 0, BPF-BW = 20Hz to 20kHz
Ripple exclusion ratio
SVRR
Rg = 0, fR = 100Hz, VR = 0dBm
45
55
dB
Channel separation
CHsep
VO = 0dBm, Rg = 10k
45
55
dB
Standby control voltage
Vst
With a 10k resistor connected at pin 12
2.5
49
12
W
20
W
51
53
0.07
0.4
%
0.4
1.0
mV
VCC
dB
V
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
Allowable power dissipation, Pd max -- W
32
Using silicon grease
Heat sink attached with
a torque of 39N cm
28
25
24
21
20
Infinite heat sink
200 x 200 x 1.5mm3Al
16
12
11
100 x 100 x 1.5mm3Al
8
5
4
3.5
50 x 50 x 1.5mm3Al
Independent IC
0
-35 -20
0
20
40
60
80
100
120
140
160
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
VCC=26.4V
+
100μF
+
10
DC
7
VCC
BS1 6
IN1
9
8
+ 47μF
+
IN1
NF1
1000μF
−
CH1
+
100μF
OUT1
+
5
0.15μF
LA4450
13
14
IN2
NF2
+
+
−
CH2
RL=8Ω
CH2
PWR 3
GND
BS2 1
IN2
*
2.2Ω
CH1
PWR 4
GND
PRE
11 GND
1000μF
OUT2
2
+
100μF
47μF
+
1000μF
0.15μF
*
RL=8Ω
2.2Ω
ST
12
OFF
ON
10kΩ
+
*Polyester Film Capacitor
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 500A.
 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)
IN
+
and CNF.
OUT
75Ω
−
NF
VG = 20log
RNf’
+
CNF
30k
75RNf ’
30KΩ
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
+
100μF/35V
C1
C10
DC
10
7
+
1000μF/35V
VCC
Ripple filter,
impulse noise
prevention circuit
Current limiter circuit
IN1
8
75Ω
+
100μF
6.3V
+
5
OUT1
−
Bias
circuit
1000μF/35V
C8
C7
R3
0.15μF
2.2Ω
RL=8Ω
4
30kΩ
Pre-ground
11
BS1 47μF/35V
+
C9
CH1
NF1
C2
6
+
9
IN1
26.4V
Overvoltage
protection circuit
Power ground
Thermal
shutdown
protection
circuit
Power ground
3
Current limiter circuit
IN2
+
13
IN2
NF2
14
C3
OUT2
CH2
−
75Ω
+
100μF
6.3V
30kΩ
1000μF/35V
+
C5
0.15μF
C6
C4
1
2.2Ω
R2
+ 47μF
BS2 35V
2
RL=8Ω
Standby switch
12
ST
10kΩ
R1
OFF
ON
+
5V
C6, C7: 0.15μF ......mylar capacitors
No.4090-5/8
LA4450
Printed Circuit Board Pattern Example
VCC
1
R1
C4
+
+
C6
C9
+
+
C2
C7
+
C10
IN1
+
C8
+
C5
R2
+
C3
C1
GND
IN2
ST
R3
OUT 2
OUT 1
GND
Copper foiled side 90×100mm2
3
Output power, PO -- W
2
PO -- VCC
5
f = 1kHz
VG = 51dB
Rg = 600Ω
THD = 10%
RL = 8Ω
3
2
Output power, PO -- W
5
10
7
5
3
2
PO -- VCC
f = 1kHz
VG = 51dB
Rg = 600Ω
THD = 10%
RL = 4Ω
10
7
5
3
2
1.0
1.0
7
5
10
14
18
22
26
30
34
7
5
10
38
14
18
10
7
5
THD -- PO
2
VCC = 26.4V
RL = 8Ω
VG = 51dB
Rg = 600Ω
Total harmonic distortion, THD -- %
Total harmonic distortion, THD -- %
2
3
2
1.0
7
5
3
2
f = 10kHz
0.1
7
5
100Hz
1kHz
3
2
7
22
26
30
34
38
Supply voltage, VCC -- V
Supply voltage, VCC -- V
10
7
5
THD -- PO
VCC = 26.4V
RL = 4Ω
VG = 51dB
Rg = 600Ω
3
2
1.0
7
5
f = 10kHz
3
2
100Hz
0.1
7
5
1kHz
3
0.1
2
3
5
7 1.0
2
3
Output power, PO -- W
5
7 10
2
3
2
7 0.1
2
3
5
7 1.0
2
3
5
7
10
2
3
Output power, PO -- W
No.4090-6/8
LA4450
f Response
0
VG = 51dB converted to 0dB.
VCC = 26.4V
RL = 8Ω
Rg = 600Ω
-2
Response -- dB
-4
-6
-8
-10
-12
-14
-16
-18
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
SVRR -- fR
0
Ripple exclusion ratio, SVRR -- dB
2
-20
-30
-40
-50
CH1
-60
CH2
-70
-80
5 7 100k
VCC = 26.4V
Rg = 0
RL = 8Ω
VG = 51dB
VCCR = 0dBm
-10
7 100
2
3
5
SVRR -- VCCR
-10
-20
-40
-50
-60
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
3
5
80
60
40
20
0
4
8
12
20
24
28
32
40
44
VCC = 26.4V
RL = 8Ω
Rg = 10kΩ
VO = 0dBm
-40
Rg = 10kΩ
0.6
Rg = 0
0.4
36
SEP -- f
-30
VG = 51dB
RL = 8Ω
BPF = 20Hz to 20kHz
0.8
16
Supply voltage, VCC -- V
Separation, sep -- dB
Output noise voltage, VNO -- mV
2
100
-20
1.6
VNO -- VCC
1.0
0.2
-50
CH2 CH1
CH1 CH2
-60
-70
0
6
10
14
18
22
26
30
34
38
-80
2 3
42
5 7 100
2 3
Supply voltage, VCC -- V
3
VCC = 26.4V
RL = 8Ω
BPF = 20Hz to 20kHz/--3dB
VG = 51dB
2 3
5 7 10k
2 3
5 7100k
Pd -- PO
f = 1kHz
RL = 8Ω (dual)
2
Power dissipation, Pd -- W
1.0
5 7 1k
Frequency, f -- Hz
VNO -- Rg
1.2
Output noise voltage, VNO -- mV
7 10k
RL = 8Ω
Rg = 0
Ripple voltage, VCCR -- Vrms
0.8
0.6
0.4
0.2
0
5
0
-70
-0.2
3
120
-30
-80
2
ICCO -- VCC
140
VCC = 26.4V
RL = 8Ω
Rg = 0
VG = 51dB
fR = 100Hz
Quiescent current, ICCO -- mA
Ripple exclusion ratio, SVRR -- dB
0
7 1k
Ripple frequency, fR -- Hz
Frequency, f -- Hz
35V
30V
26.4V
10
7
5
3
5
7
1k
2
3
5
7 10k
2
3
5
Signal Source Resistance, Rg -- Ω
7 100k
2
2
7 0.1
2
3
5
7 1.0
2
3
5
7 10
2
3
Output power, PO -- W
No.4090-7/8
LA4450
Pd -- PO
5
3
30V
Output power, PO -- W
Power dissipation, Pd -- W
3
2
.4V
26
10
7
5
3
2
3
5
7 1.0
2
3
5
7
10
2
3
RL = 4Ω
2
8Ω
10
7
5
3
2
2
7 0.1
PO -- Ta
5
f = 1kHz
RL = 4Ω (dual)
VCC = 26.4V
f = 1kHz
THD = 10%
Rg = 600Ω
1.0
-40
-20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
Output power, PO -- W
VN -- Ta
20
Rg = 0
35V
Output pin voltage, VN -- V
18
16
26.4V
14
12
10
8
11V
6
4
2
0
-40
-20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
ORDERING INFORMATION
Device
LA4450-E
Package
SIP14 36.8x13.8 / SIP14H
(Pb-Free)
Shipping (Qty / Packing)
LA4450F-E
SIP14 36.8x13.8 / SIP14H
(Pb-Free)
14 / Fan-Fold
LA4450L-E
SIP14 36.8x13.8 / SIP14H
(Pb-Free)
15 / Fan-Fold
15 / Fan-Fold
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PS No.4090-8/8