|
|
PDF LA4725 Data sheet ( Hoja de datos )
| Número de pieza | LA4725 | |
| Descripción | 2-channel 30W BTL Audio Amplifier | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LA4725 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
Ordering number : EN5715A
LA4725
Monolithic Linear IC
2-channel 30W BTL Audio
Amplifier
http://onsemi.com
Overview
The LA4725 is a 2-channel BTL audio power amplifier IC for Car audio. It was designed for the best possible audio
quality and features an extended low band roll-off frequency provided by a newly-developed NF circuit that does not
require an external capacitor. Furthermore, crosstalk, which can cause muddiness in the audio output, has been
significantly reduced by both circuit and wiring pattern improvements. Thus this amplifier can provide powerful lows
and clear highs.
Features
• Total output (EIAJ power): 30W+30W (at VCC = 14.4V, RL = 4Ω, THD = 30%)
• High-fidelity design (fL < 10Hz, fH = 130kHz)
• Extremely low impulse noise levels
• An arbitrary amplifier startup time can be set up with external components
• built-in standby switch circuit
• Full complement of built-in protection circuits (includes circuits that protect against shorting to VCC, shorting to
ground, load shorting, over-voltages and excessive temperatures)
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Surge supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
VCC surge
IO peak
Pd max
Topr
Tstg
Conditions
No signal
t ≤ 0.2s, Giant pulse one-shot
Per channel
With a infinite heat sink
Ratings
18
50
3.0
32
-35 to +85
-40 to +150
Unit
V
V
A
W
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
40109 MS JK 20090313-S00003 No.5715-1/8
1 page  
LA4725
4. Protection circuits
• Due to the system structure of the protection circuit for shorts to VCC or ground, if there is a DC resistance
between the amplifier output pins and ground, the protection circuit may operate when power is first applied and
the amplifier may fail to turn on. The basic design approach we recommend is not to adopt any designs in which
there is a DC resistance between the amplifier outputs and ground.
• The LA4725 includes a built-in thermal protection circuit to prevent the IC from being damaged or destroyed if
abnormally high temperatures occur. This thermal protection circuit gradually reduces the output if the IC
junction temperature (Tj) reaches the range 170 to 180°C due to inadequate heat sinking or other problem. If the
temperature falls, the amplifier will restart automatically.
• The LA4725 also includes other protection circuits. Use of these circuits also requires care during end product
design and testing.
5. Other notes
• The LA4725 is a BTL power amplifier. When testing this device, the ground systems for the test equipment
connected to IC inputs, and that for the test equipment connected to IC outputs, must be isolated. Do not use a
common ground.
Printed Circuit Pattern
(copper foil side)
GND
VCC
C5
+
14
GND
R2 C6
R3 C7
-OUT1
+OUT1
GND
R4 C8
R5 C9
-OUT2
+OUT2
1 LA4625/LA4725
C1
+
IN1
+ C2
R1
+
+
C4
STB
C3
IN2
+C10
No.6631-5/8
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LA4725.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LA47202P | Monolithic Linear IC Four-Channel BTL Power Amplifier |  Sanyo Semicon Device |
| LA4725 | 2-channel 30W BTL Audio Amplifier | ON Semiconductor |
| LA4725 | 2-Channel BTL Power Amplifier 30 W+30 W with Standby Switch for Car Stereos |  Sanyo |
| LA4728 | 2-Channel BTL Power Amplifier 35 W+35 W with Standby Switch for Car Stereos | Sanyo |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |