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LA4905 Datasheet

  • LA4905

  • 17-W, 2-Channel BTL AF High-Efficiency Power Amplifier for C...

  • 550.45KB

  • 10頁

  • SANYO

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Ordering number : EN5504
Monolithic Linear IC
LA4905
17-W, 2-Channel BTL AF High-Efficiency
Power Amplifier for Car Stereo Systems
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鈥檚 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.
Package Dimensions
unit: mm
3160-SIP23HZ
[LC4905]
Features
鈥?Power dissipation reduced by 50% (When average
music power is measured, and when compared to earlier
Sanyo products.)
鈥?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.
鈥?The output is a pure analog signal: no switching noise is
output to the output lines.
鈥?Operates on an 8 to 18-V single-voltage power supply.
鈥?Full complement of built-in protection circuits (shorting
to the power supply, shorting to ground, overvoltage,
and thermal protection)
鈥?Built-in standby switch
SANYO: SIP23HZ
Specifications
Maximum Ratings
at Ta = 25擄C
Parameter
Maximum supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
max1
V
CC
max2
I
O
Peak
Pd max
Topr
Tstg
(Per channel)
With an arbitrarily large heat sink
Conditions
No input, t = 1 minute
Ratings
24
18
4.5
37.5
鈥?5 to +85
鈥?0 to +150
Unit
V
V
A
W
擄C
擄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.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
83096HA (OT) No. 5504-1/10

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