Ordering number : ENA1037
Monolithic Linear IC
LA42051
Audio Output for TV Application
5W×1ch Power Ampilfier
Overview
LA42051 is 5W 1-channel AF power amplifier intended for televisions.
Features
• PO1 5W×1ch (VCC = 18V, RL = 8Ω)
• Built-in standby function
• Pop noise reduction function
• Ripple filter
• Thermal protection circuit
LA42000 series is power IC which made Pin compatible altogether in 5 to 15W. They consist of four kinds of power ICs
(mono, stereo, mono with volume function, stereo with volume function. They realized PCB layout communalization of an
audio power block of TV).
Model name
PO
LA42051
5W
LA42052
5W
LA42351
5W
LA42352
5W
LA42071
7W
Channel
Monaural
Volume
Stereo
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LA42072
7W
{
LA42152
15W
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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.
30508 TI IM B8-8019 No.A1037-1/6
LA42051
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum supply voltage
Conditions
VCC max
Allowable power dissipation
Pd max
Maximum junction temperature
Tj max
Ratings
Unit
No signal
24
Infinite heat sink
15
W
150
°C
θjc
Thermal resistance
V
°C/W
3
Operating temperature
Topr
-25 to +75
°C
Storage temperature
Tstg
-40 to +150
°C
Operating Condition at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
VCC
18
V
Recommended load resistance
RL
8
Ω
5.5 to 22
V
Allowable operating supply voltage range
VCC op
Operating Characteristics at Ta = 25°C, VCC = 18V, RL = 8Ω, f = 1kHz, Rg = 600Ω
Parameter
Symbol
Ratings
Conditions
min
Standby current
ISTB
Amplifier off
Quiescent current
ICCO
Rg = 0Ω
15
Output power
PO
THD = 10%
Total harmonic distortion
THD
PO = 1W
Voltage gain
VG
VO = 0dBm
4
VNO
Rg = 0Ω, BPF = 20Hz to 20kHz
Ripple rejection
SVRR
Rg = 0Ω, fR = 100Hz, VCCR = 0dBm
Standby control voltage (Pin 5)
VSTB-H
Amplifier on
VSTB-L
Amplifier off
Input resistance
Ri
max
1
10
μA
25
50
mA
5
33
Output noise voltage
Unit
typ
50
W
0.15
0.4
%
35
37
dB
0.05
0.25
mVrms
60
dB
1
5
0
21
30
V
0.5
V
39
kΩ
Package Dimensions
unit : mm (typ)
3107B
13
0.5
2.0
1.15
3.0 min
0.4
1.2
(0.8)
Allowable power dissipation, Pd max - W
1
1.0 min
4.5
(13.9)
15.4max
( 2.0)
(10.0)
3.4
11.2
(11.8)
C0.7
Pd max - Ta
18
2.4
25.6
16
14
Al heat sink Mounting
Torque 39N⋅cm
Flat washer
Silicone greas
applird
Infinite heat sink
15
100×100×1.5mm3
12
θj=3°C/W
11.7
10
8
50×50×1.5mm3
6
5.8
4
No Fin
2
0
-20
0
20
40
60
80
100
120
140
160
Ambient temperature, Ta - °C
SANYO : SIP13H
No.A1037-2/6
LA42051
Block Diagram
Test Circuit
LA42051
Ripple
Filter
N.C.
PRE
GND
IN
STB
P.P
Vcc
OUT
N.C.
PWR
GND
N.C.
N.C.
N.C.
1
2
3
4
5
6
7
8
9
10
11
12
13
C2
100 F
/16V
C1
1 F
/10V
C3
4.7 F
/16V
C4
1000 F
/25V
C5
470 F
/16V
RL
Description of External parts
C1
C2
C3
C4
C5
: Input coupling capacitor, for which 1.0μF is recommended. The potential of input pin is 2VBE
(about 1.4V). Therefore, the polarity must be determined according to the DC potential of the circuit
connected to the previous step of LA42051.
: Capacitor for ripple filter, for which 100μF is recommended.
: Capacitor for attenuation of pop noise, for which 4.7μF is recommended.
: Power supply capacitor.
: Output capacitor, for which 470μF is recommended. Determine the constant while taking into account
a fact that, with the capacitance set to 470μF or less, the roll-off frequency decreases in the low range.
No.A1037-3/6
LA42051
1. Standby function (pin 5)
The amplifier can be turned ON/OFF through HIGH/LOW
control of pin 5.
The amplifier is turned ON when the voltage of 1.0V (min)
or more is applied to pin 5.
Pin 5 control voltage
Voltage of pin 5
Amplifier
Standby
0 to 0.5
OFF
ON
1.0 to 5.0
ON
OFF
Insert a limiting resistor (RSTB) when the inrush current to
pin 5 is to be limited if the application voltage to VS is high.
Example: when VS=5V, RSTB=5.1kΩ is inserted
The inrush current to pin 5 is about 750μA and the potential
of pin 5 is about 1.2V.
2. Ripple filter and MUTE function (Pin 1)
The potential of pin 1 is about 1/2 VCC. Muting to control the output signal becomes effective by shifting down pin
1 with 300 to 500Ω. Note that the MUTE suppression rate decreases when the resistance exceeds 750Ω.
3. Input pin (Pin 4)
The potential of input pin is 2VBE (about 1.4V). Therefore, the polarity must be determined according to the DC
potential of the circuit connected to the previous step of LA42051. The standard input resistance is 30kΩ.
For the input capacitor, 1.0μF is recommended. The starting time with power ON in this case is about 0.2s.
The starting time becomes about 1.5s when the capacitance is 10μF.
4. P.P (Pin 6)
This is the pin to attenuate the pop noise during power ON/
OFF. Note that, with the capacitance set at 10μF or more,
the sound may remain because the signal is not cut off.
Pin 6 potential =
VCC - VCE (about 0.3V) -5.6V
2
+ 5.6V
Cautions for use
1. As power fault (power supply - output short-circuit) and ground fault (GND - output short-circuit) protective circuits are
not incorporated, due care must be taken during use.
2. The thermal protective circuit is incorporated, which is activated when the junction temperature (Tj) rises to about 160°C or
more, controlling the output gradually to the attenuated condition.
3. During use near the maximum rating, the product may suffer damage if the slightest fluctuation of condition exceeds the
maximum rating. Be sure to use the product within a range which never exceeds the maximum rating while allowing
sufficient margin for the supply voltage, etc.
No.A1037-4/6
LA42051
Po - Vcc
Icco - Vcc
10
60
RL=8Ω
Rg=0Ω
RL=8Ω
Rg=600Ω
f=1kHz
THD=10%
8
40
Po [W]
Icco [mA]
50
30
6
4
20
2
10
0
0
0
2
4
6
8
10
12
14
16
18
20
22
4
24
6
8
10
12
Vcc [V]
THD - Po
18
20
22
100
Vcc=18V
RL=8Ω
Rg=600Ω
f=1kHz
f=100Hz
f=10kHz
Vcc=18V
RL=8Ω
Rg=600Ω
Po=1W
10
THD [%]
10
THD [%]
16
THD - f
100
1
0.1
1
0.1
0.01
0.01
0.1
1
10
10
100
1000
Po [W]
10000
100000
f [Hz]
f-Response
Vno - Rg
2
0.3
Vcc=18V
RL=8Ω
DIN AUDIO
0
-2
Vno [mVrms]
Response [dB]
14
Vcc [V]
-4
-6
-8
Vcc=18V
RL=8Ω
Rg=600Ω
vo=0dBm(at f=1kHz)
-10
-12
0.2
0.1
-14
-16
10
100
1000
10000
100000
0
100
1000000
1000
f [Hz]
SVRR - Vcc
100000
1000
10000
SVRR - fr
0
0
RL=8Ω
Rg=0Ω
fr=100Hz
Vr=0dBm
Cvcc=1μF
-20
-30
Vcc=18V
RL=8Ω
Rg=0Ω
Vr=0dBm
Cvcc=1μF
-10
-20
SVRR[dB]
-10
SVRR [dB]
10000
Rg [Ω]
-40
-50
-30
-40
-50
-60
-60
-70
-70
-80
-80
4
6
8
10
12
14
Vcc [V]
16
18
20
22
24
10
100
fr [Hz]
No.A1037-5/6
LA42051
SVRR - Vr
Vcc=18V
RL=8Ω
Rg=0Ω
fr=100Hz
Cvcc=1μF
SVRR=20log(Vo/Vr)
SVRR [dB]
-20
-30
RL=8Ω
Rg=600Ω
f=1kHz
2.5
2
Pd[W]
-10
Pd-Po
3
0
-40
-50
1.5
1
Vcc=18V
-60
Vcc=14V
0.5
-70
Vcc=12V
0
-80
0
0.2
0.4
0.6
0.8
1
1.2
Vr [Vrms]
1.4
1.6
1.8
2
2.2
0.1
1
10
Po[W]
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
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semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
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limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
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product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
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with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
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intellectual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of March, 2008. Specifications and information herein are subject
to change without notice.
PS No.A1037-6/6