LA42052 [SANYO]
Monolithic Linear IC 5W 2-Channel AF Power Amplifier With DC Volume Control; 单片线性集成电路5W 2通道AF功率放大器直流音量控制
| 型号： | LA42052 |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Monolithic Linear IC 5W 2-Channel AF Power Amplifier With DC Volume Control |
| 文件： | 总9页 (文件大小：396K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA0078
Monolithic Linear IC
5W 2-Channel AF Power Amplifier
With DC Volume Control
LA42352
Overview
LA42352 is 5W 2-channel AF power amplifier with DC volume control intended for televisions.
LA42000 series is power IC which made Pin compatible possible altogether in 3 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.
Channel
PO
Volume
Mono
Stereo
LA42051
LA42052
LA42351
LA42352
LA42071
LA42072
LA42152
5W
5W
5W
5W
7W
7W
15W
°
°
°
°
°
°
°
°
°
Feature
• P 5W×2ch (V
= 18V, R = 8Ω, THD = 10%)
L
O
CC
• Built-in DC Volume Control.
• Built-in Standby function.
• Built-in overheat protection.
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor 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
products described or contained herein.
92706 / 83005 MS PC B8-9060 No.A0078-1/9
LA42352
Specitications
Maximum Ratings at Ta = 25 °C
Parameter
Maximum supply voltage
Allowable power dissipation
Maximum junction temperature
Thermal resistance
Symbol
Conditions
Ratings
Unit
V
V
max
No signal
Infinite heat sink
24
15
CC
Pd max
W
Tj max
θjc
150
°C
3
°C/W
°C
Operating temperature
Storage temperature
Topr
Tstg
-25 to +75
-40 to +150
°C
Operating Conditions at Ta = 25 °C
Parameter
Symbol
Conditions
Ratings
Unit
V
Recommended supply voltage
Recommended load resistance
Allowable operating voltage range
V
18
8
CC
R
Ω
L
V
op
10 to 22
V
CC
Operating Characteristics at Ta = 25°C, V
= 18V, R = 8Ω, Volume = 5V, f = 1kHz, Rg = 600Ω
CC
L
Ratings
Parameter
Symbol
Conditions
Unit
min
typ
max
10
Standby current
I
I
Amplifier off
1
65
5
µA
mA
STB
CCO
Quiescent current
Output power
Rg = 0, Volume = 0V
THD = 10%
35
130
P
4
W
O
Total harmonic distortion
Voltage gain
THD
VG
P
V
= 1W
0.1
34.5
0.13
0.8
36.5
0.4
%
O
= 0dBm
32.5
dB
O
Output noise voltage
V
Rg = 0, Volume = 0V,
BPF = 20Hz to 20kHz
mVrms
NO
Volume Attenuation
Channel separation
Att
V
= 100mV, Vcont = 0V, with 1k-BPF
70
48
2.5
0
80
55
dB
dB
V
IN
Sep.
Rg = 10kΩ, V = 0dBm
O
Standby control voltage
(The Pin 5 voltage)
V
-H
-L
Amplifier on
Amplifier off
10
0.5
26
STB
V
V
STB
Input resistance
Ri
14
20
kΩ
*0dBm = 1mW (600Ω) = 774.6mVrms
Package Dimensions
unit : mm
3107B
No.A0078-2/9
LA42352
Block Diagram
Standby
V
CC
7
5
Ri =
20kΩ
Input amplifier
Output amplifier
2
IN1
12
11
OUT1
NF1
13
Volume 1
Pre
GND
3
Thermal protection
circuit
Ri =
Power
GND
20kΩ
10
8
Input amplifier
Output amplifier
4
6
IN2
OUT2
Volume 2
9
NF2
Ripple Filter
Block
1
Ripple
Filter
Sample Application Circuit
LA42352
Ripple
Filter
PRE
GND
PWR
GND
IN1
2
IN2
STB
5
Vol 2
6
V
OUT2
8
NF2
9
NF1
11
OUT1
12
Vol 1
13
CC
1
+
3
4
7
10
C4
+5V
+5V
1000µF
C9
47µF
C10
C3
+
+
/25V
47µF
47µF
C1
C2
+
+
/16V
/16V
/25V
R3
+
1.0µF
/10V
1.0µF
10kΩ
/10V
+
+
C7
0.1µF
R1
2.2Ω
C8
0.1µF
R2
2.2Ω
C5
470µF
/16V
C6
470µF
/16V
CPU
R
R
L
L
No.A0078-3/9
LA42352
Pin Descriptions
Pin Voltage
= 18V
Pin No
1
Symbol
RF
Equivalent Circuit
Description
V
CC
17.6
• Ripple filter reference
2
4
IN1
IN2
4.4
• Input pin
3
5
PRE_GND
STB
0
• Pre GND pin
0 to 5V
• Standby pin
(Input voltage)
• The standby function is on when this
pin at ground level
6
Vol 2
Vol 1
0 to 5V
• Control Volume
13
(Input voltage)
7
V
18
• Power supply
CC
Continued on next page.
No.A0078-4/9
LA42352
Continued from preceding page.
Pin Voltage
Pin No
Symbol
Equivalent Circuit
Description
V
= 18V
CC
8.9
8
OUT2
OUT1
• Output pin
12
9
NF2
NF1
8.8
• Negative feedback pin at Power
amplifier
10
• Connect NF capacitor
10
PWR_GND
0
• Power GND pin
Description of External parts
C1, C2
C3
: Input capacitors. A value of 1.0µF is recommended for capacitors. Note that the low-frequency area
characteristics can be adjusted by changing f .
L
: Ripple filter capacitor. A value of 47µF is recommended for capacitors. Decreasing the capacitance value
excessively or removing this capacitor causes ripple to occur. However, increasing the capacitance value
does not always cause ripple to reduced. Decreasing the capacitance value makes the starting time earlier.
: Power capacitor.
C4
C5, C6
C7, C8
: Output capacitors. A value of 470µF is recommended for capacitors.
: Oscillation blocking capacitor. Use a polyester film capacitor that is good in high frequency response and
temperature characteristic.
C9, C10
R1, R2
R3
: Feedback capacitor. A value of 47µF is recommended for capacitors. Decreasing the capacitance value
lowers the low frequency response. Increasing the capacitance value makes the starting time later.
: Resistor connected in series with oscillation blocking capacitor. Prevents phase shift attributable to the
oscillation blocking capacitor so that oscillation is hard to occur.
: Standby switch current limiting resistor. A value of 10kΩ is recommended for resistance (when the applied
voltage for the standby switch is 3V to 10V). This resistor cannot be removed.
No.A0078-5/9
LA42352
Features of IC Inside and Usage Note
Standby function
• Pin 5 is the standby switch pin. The amplifier is turned on by applying approximately 3V or more to this pin through an
external resistor (R3).
• If voltage in excess of 10V is to be applied to the standby switch, calculate the value of R3 using the following formula
so that the current flowing into pin 5 is 500µA or less:
(Applied voltage − 2V
500µA
(≈1.4V))
BE
R3 =
− 15kΩ
Protector
• In order to prevent damage or degradation which may be caused by abnormally heated IC, the LA42352 has a thermal
shutdown protector. Accordingly, if the IC junction temperature (Tj) climbs to around 160°C due to inadequate heat
dissipation, the thermal shutdown protector will operate to control the output gradually into attenuation.
No.A0078-6/9
LA42352
No.A0078-7/9
LA42352
No.A0078-8/9
LA42352
Specifications of any and all SANYO Semiconductor 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.
SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any
and all semiconductor products fail with some probability. It is possible that these probabilistic failures
could give rise to accidents or events that could endanger human lives, that could give rise to smoke or
fire, or that could cause damage to other property. When designing equipment, adopt safety measures
so that these kinds of accidents or events cannot occur. Such measures include but are not limited to
protective circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO Semiconductor products (including technical data,services) described
or contained herein are controlled under any of applicable local export control laws and regulations, such
products must not be exported without obtaining the export license from the authorities concerned in
accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system, or
otherwise, without the prior written permission of SANYO Semiconductor Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO Semiconductor 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. SANYO Semiconductor 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 August, 2005. Specifications and information herein are subject
to change without notice.
PS No.A0078-9/9
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