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LA4708 Datasheet

  • LA4708

  • 20 W 2-channel BTL AF Power Amplifier for Car Stereos

  • 9頁

  • SANYO

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Ordering number: EN5245A
Monolithic Linear IC
LA4708
20 W 2-channel BTL AF Power Amplifier
for Car Stereos
Overview
The LA4708 is a BTL two-channel power IC for car audio
developed in pursuit of excellent sound quality. Low-region
frequency characteristics have been improved through the use
of a new NF capacitorless circuit, and crosstalk which causes
鈥樷€榤uddy鈥欌€?sound has been reduced by improving both circuit
and pattern layout. As a result, the LA4708 provides powerful
bass and clear treble. In addition, the LA4708 features on-chip
protectors and standby switch. The LA4708 is also
pin-compatible with the LA4705NA (car stereo-use 17 W
two-channel power IC), and can be substituted for the
LA4705NA for higher power. (When the board is shared, pins
1 and 9 must be left open.)
Package Dimensions
unit: mm
3109-SIP18H
[LA4708]
Features
.
High power: supports total output of 30 W + 30 W
R =4
.
(V = 13.2 V, 2THD(P= 30%, W when
鈩?
= 13.2 V,
Supports R =
鈩?/div>
= 30
V
THD = 10%)
.
Designed for excellent sound quality
10 Hz, f
.
(f <capacitorless= 130 kHz)
.
NF on time settable by external capacitor
.
Any pop noise
.
Less switch circuit on chip (microprocessor supported)
.
Standby protectors on chip
Various
CC
L
L
O
CC
L
H
SANYO : SIP18H
(output-to-ground short/output-to-V
CC
short/
load short/overvoltage/thermal shutdown circuit)
Specifications
Maximum Ratings
at Ta = 25擄C
Parameter
Maximum supply voltage
Surge supply voltage
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
max 1
V
CC
max 2
V
CC
surge
I
O
peak
Pd max
Topr
Tstg
t
%
0.2 s, single giant pulse
Per channel
Arbitrarily large heat sink
Conditions
No signal, t = 60 s
Ratings
24
16
50
4.5
37.5
鈥?5 to +85
鈥?0 to +150
Unit
V
V
V
A
W
擄C
擄C
* Set V
CC
, R
L
in a range that does not exceed Pd max = 37.5 W
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93096HA(II)/13096HA(II) No.5245-1/9

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