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參數資料
| 型號： | LA4905 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 元件分類： | 音頻放大器 |
| 英文描述： | 17-W, 2-Channel BTL AF High-Efficiency Power Amplifier for Car Stereo Systems |
| 中文描述： | 17鎢，雙通道橋接自動對焦高效率數字功放的汽車音響系統(tǒng) |
| 文件頁數： | 1/10頁 |
| 文件大?。?/td> | 549K |
| 代理商： | LA4905 |
Overview
The LA4905 is a BTL 2-channel power amplifier IC for
use in car audio systems. Increases in the number of
external components are held to a minimum by adopting
both a signal-following type switching scheme in the
amplifier’s output stage power supply, and a newly-
developed nonlinear amplifier that has nonlinear
characteristics in the signal system. The power dissipation
(thermal loss) in the actual operating range has been
reduced to about 1/2 that of earlier class B amplifier ICs.
This contributes significantly to miniaturization of the heat
sink and to reduction of heating within the set.
Features
Power dissipation reduced by 50% (When average
music power is measured, and when compared to earlier
Sanyo products.)
The number of required signal follower circuits has been
reduced to a single circuit for two channels, allowing the
number of external components to be reduced.
The output is a pure analog signal: no switching noise is
output to the output lines.
Operates on an 8 to 18-V single-voltage power supply.
Full complement of built-in protection circuits (shorting
to the power supply, shorting to ground, overvoltage,
and thermal protection)
Built-in standby switch
Package Dimensions
unit: mm
3160-SIP23HZ
Monolithic Linear IC
LA4905
Ordering number : EN5504
83096HA (OT) No. 5504-1/10
SANYO: SIP23HZ
[LC4905]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
17-W, 2-Channel BTL AF High-Efficiency
Power Amplifier for Car Stereo Systems
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max1
V
CC
max2
I
O
Peak
Pd max
No input, t = 1 minute
24
V
18
V
Maximum output current
(Per channel)
4.5
A
Allowable power dissipation
With an arbitrarily large heat sink
37.5
W
Operating temperature
Topr
–35 to +85
°C
Storage temperature
Tstg
–40 to +150
°C
Specifications
Maximum Ratings
at Ta = 25°C
Notes: 1. Set VCC and RL in the range where Pd max does not exceed 37.5 W.
2. The overvoltage protection circuit operates when VCC is 20 V or higher.
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