LA4708 Datasheet, PDF (1/9 Pages) Sanyo Semicon Device – 20 W 2-channel BTL AF Power Amplifier for Car Stereos

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
‘‘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.)
Package Dimensions
unit: mm
3109-SIP18H
[LA4708]
Features
. _{High power: supports total output of 30 W + 30 W}
. ^{(VCC = 13.2 V, THD = 30%, RL = 4 Ω)}
Supports R_L = 2 Ω (P_O = 30 W when V_CC = 13.2 V,
. THD = 10%)
Designed for excellent sound quality
(f_L < 10 Hz, f_H = 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-V_CC short/
load short/overvoltage/thermal shutdown circuit)
Specifications
Maximum Ratings at Ta = 25°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
Conditions
No signal, t = 60 s
t % 0.2 s, single giant pulse
Per channel
Arbitrarily large heat sink
* Set V_CC, R_L in a range that does not exceed Pd max = 37.5 W
SANYO : SIP18H
Ratings
Unit
24
V
16
V
50
V
4.5
A
37.5
W
–35 to +85
°C
–40 to +150
°C
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