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LA4906 Datasheet

  • LA4906

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

  • 10頁

  • SANYO

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Ordering number : EN
*5714
Monolithic Linear IC
LA4906
17-W, 2-Channel BTL AF High-Efficiency
Power Amplifier for Car Audio Systems
Preliminary
Overview
The LA4906 is a BTL two-channel power amplifier for
use in car audio systems. It uses a signal-following
switching technique in the power supply for the amplifier
output stage and a newly-developed nonlinear amplifier
that features nonlinear characteristics in the signal system.
These features hold increases in the number of external
components to a minimum, and reduce power dissipation
(and thus heat generation) in the practical operating region
to about 1/2 that of earlier class B amplifier ICs. This can
contribute significantly to miniaturization and weight
reduction in the heat sink and to reduction of the heat
generated within the end product case.
鈥?Uses a single-voltage power supply from 8 to 18 V.
鈥?Provides a full range of built-in protection circuits,
including shorting of output pin to V
CC
, shorting of
output pin to ground, overvoltage, and thermal
shutdown protection.
鈥?Built-in standby switch
鈥?Clipping detection function
Package Dimensions
unit: mm
3160-SIP23HZ
[LA4906]
Features
鈥?Power dissipation reduced by 50% (for music at average
power levels, as compared to earlier Sanyo products)
鈥?The number of required signal-following switching
circuits has been reduced to just one circuit for two
channels, reducing the number of external components.
鈥?The output is a pure analog signal; no switching noise
whatsoever appears on the output lines.
SANYO: SIP23HZ
Specifications
Absolute 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
With no signal, t = 1 minute
Ratings
18
16
4.5
37.5
鈥?5 to +85
鈥?0 to +150
Unit
V
V
A
W
擄C
擄C
Notes: 1. Set V
CC
and R
L
to be in the range where Pd max does not exceed 37.5 W.
2. The overvoltage protection circuit operates at V
CC
= 26 V or higher.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
73097HA(OT) No. 5714-1/10

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