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LA4708 Datasheet(Fiches technique) 1 Page - Sanyo Semicon Device

Numéro de pièce LA4708
Description  20 W 2-channel BTL AF Power Amplifier for Car Stereos
Télécharger  9 Pages
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Fabricant  SANYO [Sanyo Semicon Device]
Site Internet  http://www.ssdc-jp.com/eng/
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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
‘‘muddy’’ 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.)
Features
.
High power: supports total output of 30 W + 30 W
(VCC = 13.2 V, THD = 30%, RL =4 Ω)
.
Supports RL =2 Ω (PO = 30 W when VCC = 13.2 V,
THD = 10%)
.
Designed for excellent sound quality
(fL < 10 Hz, fH = 130 kHz)
.
NF capacitorless
.
Any on time settable by external capacitor
.
Less pop noise
.
Standby switch circuit on chip (microprocessor supported)
.
Various protectors on chip
(output-to-ground short/output-to-VCC short/
load short/overvoltage/thermal shutdown circuit)
Package Dimensions
unit: mm
3109-SIP18H
[LA4708]
SANYO : SIP18H
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max 1
No signal,t=60s
24
V
VCC max 2
16
V
Surge supply voltage
VCC surge
t
% 0.2 s, single giant pulse
50
V
Maximum output current
IO peak
Per channel
4.5
A
Allowable power dissipation
Pd max
Arbitrarily large heat sink
37.5
W
Operating temperature
Topr
–35 to +85
°C
Storage temperature
Tstg
–40 to +150
°C
* Set VCC,RL in a range that does not exceed Pd max = 37.5 W
Ordering number: EN5245A
Monolithic Linear IC
LA4708
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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