LA4919N [SANYO]
Monolithic Linear IC Two-Channel 10W BTL High-Efficiency TV Audio Output Power Amplifier; 单片线性IC双通道BTL 10W高效率电视机音频输出功率放大器
| 型号： | LA4919N |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Monolithic Linear IC Two-Channel 10W BTL High-Efficiency TV Audio Output Power Amplifier |
| 文件： | 总6页 (文件大小：79K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA0323
Monolithic Linear IC
Two-Channel 10W BTL High-Efficiency
TV Audio Output Power Amplifier
LA4919N
Overview
The LA4919N is a 2-channel 10W BTL high-efficiency power amplifier. By using a signal following switching system for
the power supply to the amplifier output stage and by including a nonlinear amplifier in the signal system, the LA4919N
holds the number of external components to a minimum and reduces the power consumption (thermal loss) in the operating
range to one half that of earlier class B power amplifiers.
The use of a DIP-28H package obviates the need for a separate heat sink and can contribute to internal space savings in end
products.
Features
• High-efficiency 2-channel × 10W BTL power amplifier (V
• Provided in a DIP-28H package (no heat sink is required)
= 15V, R = 8Ω)
L
CC
• The number of required signal-following switching circuits has been held to a single circuit, thus reducing even further
the number of external components required.
• The output is a fully analog signal, and no switching noise appears on the output lines.
• Built-in standby switch (amplifier block/headphone block)
• Built-in headphone amplifier : 2 inputs/2 outputs (VG = 6dB, P = 60mW)
O
• Built-in protection circuits (overvoltage and thermal protection circuits)
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Thermal resistance
Symbol
max
Conditions
Ratings
Unit
V
V
No signal
With a infinity large heat sink
24
15
CC
Pd max
θj-c
W
3
°C/W
°C
Maximum junction temperature
Operating temperature
Storage temperature
Tj max
Topr
150
-25 to +75
-40 to +150
°C
Tstg
°C
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.
N1506 MS PC B8-7776, B8-7179 No.A0323-1/6
LA4919N
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Recommended supply voltage
Recommended load resistance
V
15
CC
R
L
Amplifier block
8
32
Ω
Headphone block
Ω
Operating supply voltage range
V
op
The range where the package Pd is not
exceeded
7.5 to 18
V
CC
Electrical Characteristics at Ta = 25°C, V
(Pin 19), Pre V
(Pin 11) = 15V, R = 8Ω, f = 1kHz, Rg = 600Ω,
CC
CC
L
See the specified board and circuit.
Ratings
Unit
Parameter
[Amplifier block]
Symbol
Conditions
min
typ
max
Quiescent current
Standby current
I
Rg = 0
Amplifier off, headphone off
= 0dBm
35
65
0
120
mA
µA
dB
W
CCO
Ist
10
32
Voltage gain
VG
V
28
8
30
10
O
Output power
P
THD = 10%
= 1W, LPF = 30kHz
O
Total harmonic distortion
Output noise voltage
Channel separation
Ripple rejection
THD
P
0.04
0.05
60
0.4
0.3
%
O
V
Rg = 0, DIN AUDIO*1
mV
dB
dB
kΩ
mV
V
NO
Chsep
SVRR
Ri
Rg = 10kΩ, V = 0dBm, DIN AUDIO*1
50
60
21
O
Rg = 0, fR = 100Hz, VR = 0dBm, DIN AUDIO*1
70
Input resistance
30
39
+120
18
Output offset voltage
Standby control voltage
Voffset
Rg = 0
-120
2
V
Amplifier on
Amplifier off
ST
0
1.0
V
Pin 7 sink current
(DDL on current)*2
I
When +5V is applied to pin 7 through a 10kΩ
100
150
200
µA
7Pin
resistor, THD = 10%
[Headphone block]
Voltage gain
VG
V
= 0dBm
5
6
60
7
dB
mW
%
O
Output power
P
THD = 10%
= 0dBm, LPF = 30kHz
50
O
Total harmonic distortion
Channel separation
Ripple rejection
THD
Chsep
SVRR
Ri
V
0.025
70
0.05
O
Rg = 10kΩ, V = 0dBm, DIN AUDIO*1
60
75
14
dB
dB
kΩ
mV
V
O
Rg = 0, fR = 100Hz, VR = 0dBm, DIN AUDIO*1
85
Input resistance
20
26
0.04
18
Output noise voltage
Standby control voltage
V
Rg = 0, DIN AUDIO*1
Headphone amplifier on
Headphone amplifier off
0.01
NO
V
2
0
ST
1.0
V
*1 : A DIN audio filter (20Hz to 20kHz) is used during testing.
*2 : DDL : Dynamic Distortion Limiter
No.A0323-2/6
LA4919N
Package Dimensions
unit : mm (typ)
3147C
Pd max -- Ta
Aluminum heat sink mounting conditions
18
Aluminum heat sink Tightening
28
15
16
15
14
torque : 39Ncm
Flat washer with
silicone grease
With a infinity large heat sink
100×100×1.5mm3
12.5
12
R1.7
θjc=3˚C/W
10
1
14
8
7
6
20.0
50×50×1.5mm3
26.75
Mounted on the
specified circuit board
4
3.5
2.5
2
Independent IC
0
(1.81)
--40 --20
0
20
40
60
80
100 120 140 160
1.78
0.6
1.0
Ambient temperature, Ta – ˚C
SANYO : DIP28H(500mil)
No.A0323-3/6
LA4919N
Block Diagram
Headphone block
VG=6dB
HP IN1
1
2
28 HP OUT1
Voltage
regulator
V
CC
Ripple filter
HP IN2
HP D.C
VG=6dB
HP OUT2
POWER GND
OUT2-
27
26
25
24
23
22
21
20
19
18
17
16
H/P Standby SW
3
Output
amplifier
A
B
HP Standby
AMP Standby
D.C
4
Nonlinear
amplifier
OUT2+
5
AMP Standby SW
Ripple filter
Output
amplifier
SW GND
SWB
6
Switching regulator block
Switching
drive
H.L.S
DDL
7
A B C D
*H.L.S
Higher
Level signal
Selector
Muting circuit
ON TIME
IN2
SWE
8
used at power on
SW OUT
9
Input
amplifier
Headphone stage
Input amplifier stage
Switching regulator stage
PRE GND
V
10
11
12
13
CC
Power TR stage
PRE V
CC
Output amplifier stage
REF
amplifier
IN VREF
IN1
Output
amplifier
C
OUT1+
Nonlinear
amplifier
Input
amplifier
D
POWER GND 14
15 OUT1-
Output
amplifier
No.A0323-4/6
LA4919N
Test Circuit
R7 10Ω
C17
0.047µF
C1
C18 100µF/10V
1µF/10V
+
+
+
1
2
HP IN1
HP IN2
HP D.C
HP Standby
AMP Standby
D.C
HP OUT1 28
Headphones
0.1µF
+
27
HP OUT2
C16
C2
1µF/10V
C19 100µF/10V
0.047µF
R6 10Ω
3
26
C3
47µF/25V
+
POWER GND
R4 2.2Ω
*C15 0.1µF
OUT2-
OUT2+
SW GND
SWB
4
25
24
23
22
21
20
19
18
17
5
*C14 0.1µF
R3 2.2Ω
6
C4
47µF/25V
+
Tr1
Switching transistor
=2.5V
Components used during testing
- Tr1 : 2SD1667 (S rank)
- SANYO Electric Co., Ltd.
- D1 : SB10-05A2
- SANYO Electric Co., Ltd.
- L1 : A671HN-221L
- TOKO, Inc.
DDL
7
I
C
T
10kΩ
*DDL OUT
C5
22µF/6.3V
*When measuring
DDL OUT, apply 5V
and measure through
f =30 to 50MHz
D1 Flywhool Di
ON TIME
IN2
SWE
8
+
a 10kΩ resistor.
L1 200µH
+
+
SW OUT
9
-C13 : OS capacitor
C6
2.2µF/6.3V
C13
R5
- SANYO Electric Co., Ltd.
2.2µF/25V 2.2kΩ
PRE GND
V
10
11
12
+B
+
CC
C12
1000µF/25V
PRE V
CC
+B
+
C20
C11 1000pF
10µF/25V
IN VREF
C7
22µF/6.3V
+
R1 2.2Ω
*C9 0.1µF
+
13 IN1
OUT1+ 16
OUT1- 15
C8
2.2µF/6.3V
14 POWER GND
*C10 0.1µF
R2 2.2Ω
* : When used shorted to V
it is not necessary to add a capacitor
at pin 11.
(pin 19),
CC
* : Polyester film capacitor
External Components
〈Amplifier Block〉
C4 :
C5 :
Ripple filter capacitor. We recommend a value of 47µF.
Sets the amplifier turn-on delay time. We recommend a value of 22µF. (The turn-on delay time for
this value will be about 0.7 seconds.) While the speed with which the amplifier turns on can be
increased by reducing the value of this capacitor, this can result in impulse noise. We recommend
using a value of over 10µF.
C6 and C8 :
Input capacitors. We recommend a value of 22µF. Note that if modified, 3.3µF or lower values
should be used due to the relationship with impulse noise.
C7 :
C9 and C10 :
Input reference amplifier capacitor. The same value as that for C6 and C8 must be used.
Oscillation prevention capacitors. We recommend using polyester film capacitors with excellent
thermal characteristics. These are used together with R1, R2, R3, and R4.
C14 and C15
C11 :
C12 :
Switching regulator oscillation prevention capacitor. We recommend a value of 1000pF.
Power supply capacitor
C13 :
Switching regulator output smoothing capacitor. The LA4919N adopts a self-excited switching
regulator technique. Since this capacitor influences the self excitation stability characteristics and
the regulator efficiency, we recommend using a capacitor with a low equivalent series resistance
and excellent thermal characteristics. For the same reason, resistor R5 (2.2Ω) is used together with
this capacitor.
C20 :
Pre-V
power supply capacitor. This capacitor is not required when used connected to V
.
CC
CC
No.A0323-5/6
LA4919N
Tr1 :
External switching transistor. We recommend using a device with I = 2.5A and f = 30 to
C T
50MHz. Note that if a transistor with f = 100MHz or higher is used, it may induce oscillation in
T
the switching waveform. In this case, we recommend adding a base resistor of about 10Ω, and
adjusting the circuit so that oscillation does not occur.
D1 :
L1 :
Flywheel diode to take up the energy from the coil. We recommend using a Schottky barrier diode
with a low VF.
We recommend using a 200µH coil. In particular, we recommend a coil in the inductance range
180 to 220µH, a DC resistance of under 0.3Ω, and a maximum allowable current of over 0.4A.
〈Headphone Block〉
C1 and C2 :
C3 :
Input capacitors. We recommend a value of 0.1µF.
Ripple filter capacitor. We recommend a value of 47µF.
C16 and C17 :
Oscillation prevention capacitors. We recommend using polyester film capacitors with excellent
thermal characteristics. These are used together with R6 and R7.
Output capacitors. We recommend a value of 100µF.
C18 and C19 :
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 November, 2006. Specifications and information herein are subject
to change without notice.
PS No.A0323-6/6
相关型号：
©2020 ICPDF网 联系我们和版权申明