LA42102 is 10W 2-channel AF power amplifier intended for televisions.
Functions
•
10W
×
2 channels (V
CC
= 14V, R
L
= 8Ω).
•
Standby function.
•
Built-in mute function.
•
Built-in various protection circuit (short to VCC/short to groumd/load shorting/overheating).
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Maximum junction temperature
Thermal resistance
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Tj max
θjc
Topr
Tstg
Infinitely large heat sink
Conditions
Ratings
17
15
150
3
-25 to +75
-40 to +150
Unit
V
W
°C
°C/W
°C
°C
Operating Conditions
at Ta = 25°C
Parameter
Recommended supply voltage
Recommended load resistance
Allowable operating supply
voltage range
Symbol
VCC
RL
VCC op
Under conditions such that
Maximum ratings are not exceeded
Conditions
Ratings
14
8
10 to 17
Unit
V
Ω
V
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.
52307 MS PC / 40407 MS PC 20060926-S00001 No.A0494-1/8
LA42102
Electrical Characteristics
at Ta
=
25°C, VCC = 14V, RL = 8Ω, f = 1kHz, Rg = 600Ω
Parameter
Standby current
Quiescent current
Output power
Total harmonic distortion
Voltage gain
Output noise voltage
Ripple rejection ratio
Channel separation
Mute attenuation value
Mute control voltage (pin 6)
Symbol
Ist
ICCO
PO1
THD
VG
VNO
SVRR
CH.Sep
ATT
Vmute
Amplifier OFF
Rg = 0, RL = OPEN
THD = 10%
PO = 1W
VO = 0dBm
Rg = 0, BPF = 20Hz to 20kHz
Rg = 0, fR = 100Hz, VCCR = 0dBm
Rg = 10kΩ, VO = 0dBm
VO = 1Vrms, BPF = 20Hz to 20kHz
Mute ON *1
Mute OFF
Standby control voltage (pin 5)
Vst
Amplifier ON *1
Amplifier OFF
Input resistance
Ri
40
50
80
1.7
0
2.5
0
21
30
33
40
8
Conditions
min
Ratings
typ
0
70
10
0.06
35
0.2
50
60
90
3.0
0.5
VCC
0.5
39
0.2
37
0.4
max
10
140
µA
mA
W
%
dB
mVrms
dB
dB
dB
V
V
V
V
kΩ
Unit
*1 : Note that the standby pin (pin 5) and MUTE pin (pin 6) incorporate the anti-electrostatic diode allowing the current to flow through the diode when the
potential of VCC 7 pin decreases below that of pin 5/6.
Package Dimensions
unit : mm (typ)
3107B
18
Pd max -- Ta
Infinitely large heat sink
15
25.6
C0.7
3.4
(10.0)
(
2.0)
2.4
Allowable power dissipation, Pd max – W
3.0 min
16
14
12
10
8
6
4
2
0
--20
100×100×1.5mm
3
11.7
θjc=3ºC/W
11.2
(11.8)
15.4max
(13.9)
50×50×1.5mm
3
5.8
4.5
1
0.5
2.0
(0.8)
1.15
13
1.0 min
No heat sink
0.4
1.2
0
20
40
60
80
100
120
140
160
Ambient temperature, Ta – ˚C
SANYO : SIP13H
No.A0494-2/8
LA42102
Block Diagram
Standby
5
VCC
7
Input amplifier
12 +OUT1
IN1 2
Ri=
30kΩ
Output amplifier
11 -OUT1
MUTE 6
VCC/ground shorting protection circuit
Load shorting protection circuit
Thermal protection circuit
PWR
10 GND
PRE
GND 3
8
IN2 4
Ri=
30kΩ
Input amplifier
Output amplifier
9
+OUT2
-OUT2
1
Ripple
Filter
Test Circuit
LA42102
Ripple
Filter
1
C3 +
47µF
/25V
*
PRE
GND
3
PWR
GND
10
IN1
2
IN2
4
STBY MUTE
5
VCC
+OUT2 -OUT2
9
RL
C8
0.1µF
R4
2.2Ω
-OUT1 +OUT1
11
RL
C7
0.1µF
R3
2.2Ω
12
N.C.
13
C1
4.7µF
/10V
*
C2
4.7µF
/10V
6
7
8
C4
C5
10µF
1000µF
/10V
/25V
R1
15kΩ
+
+
C9
0.1µF
R5
2.2Ω
C6
0.1µF
R2
2.2Ω
PCA00898
+5V
* LA42102 employs the zero-bias type input circuit, with the input pin potential being nearly zero (about 0.01V).
Accordingly, the polarity must be determined according to the DC potential of a circuit connected to the previous stage
of LA42102.
No.A0494-3/8
LA42102
External Components
C1, C2
: Input coupling capacitors, for which 4.7µF or less is recommended. LA42102 employs the zero-bias type
input circuit, with the input pin potential being nearly zero. Accordingly, the polarity must be determined
according to the DC potential of a circuit connected to the previous stage of LA42102.
C3
: Capacitor for starting time of the ripple filter and amplifier, for which 47µF is recommended.
C4, R1 : Capacitor and resistor for mute. C4 is necessary even when the mute function is not used.
C5
: Power capacitor.
C6 to C9 : Capacitor and resistor for oscillation prevention. For C6 to C9, the polyester film capacitor with superior
R2 to R5 temperature characteristics (Mylar capacitor) is recommended. Use R2 to R5 of 2.2Ω along with the
capacitor.
1. Mute function (pin 6)
With the pin 6 voltage of 1.7V (minimum) or more, the mute function is turned ON.
Set the VM application voltage so that the pin 6 voltage becomes. 1.7V or more.
The mute time constant is determined by R1 and C4. Determine the constant after careful review because it is related
to the pop sound at mute ON/OFF.
C4 is necessary even when the mute function is not used because it is related to the pop sound when the amplifier is
turned ON.
Note that the MUTE pin (pin 6) incorporates the
anti-electrostatic diode, allowing the current to flow through the
diode when the potential of VCC 7 pin decreases below that of
pin 6.
Mute
VCC
VM
R1
6
C4 +
10µF
2kΩ
20kΩ
2kΩ
2. Standby function (pin 5)
The amplifier is turned ON when the voltage of 2.5V (minimum) or more is applied to pin 5.
Pin 5 control voltage
Pin 5 voltage
0 to 0.5
2.5 to 15
Amplifier
OFF
ON
Standby
ON
OFF
Standby
VCC
2VBE
VS
RSTB
5
30kΩ
1.5kΩ
15kΩ
To suppress the inrush current to pin 5 when the VSTB
application voltage is high, insert the control resistor (RSTB).
Example : Tosuppress the pin 5 inrush current to 500µA or less
RSTB =
Applied voltage (VSTB) -2VBE (About 1.4V)
-15kΩ
500µA
Note that the standby pin (pin 5) incorporates the anti-electrostatic diode, allowing the cu orrent to flow through the
diode when the potential of VCC pin 7 decreases below that of pin 5.
1 Introduction
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