Ordering number: EN3535A
Monolithic Linear IC
LA4581MB
Preamplifier + Power Amplifier
for 3V Headphone Stereos
Overview
The LA4581MB is an auto reverse-supported preamplifier +
power amplifier IC that is intended for use in 3V headphone
stereos.
Package Dimensions
unit : mm
3112-MFP24S
[LA4581MB]
Features
.
Preamplifier muting and preamplifier output on/off can be
.
.
.
.
implemented with one pin. This IC can easily be used to
construct a set with a radio.
The power amplifier needs no input/output coupling
capacitor.
A high-frequency cut capacitor is connected to the
preamplifier input pin and the power amplifier input pin.
(Anti-buzz provision)
Because V
ref
AMP (r
0
= 10
鈩?
is built in, the virtual
grounding impedance is about 10
鈩?
This eliminates the
need for a large capacitor.
8
鈩?/div>
speaker drivable.
SANYO : MFP24S
Specifications
Maximum Ratings
at Ta = 25 擄C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
max
Pd max
Topr
Tstg
Conditions
Ratings
4.5
530
鈥?0 to +75
鈥?0 to +125
Unit
V
mW
擄C
擄C
Operating Conditions
at Ta = 25 擄C
Parameter
Recommended supply voltage
Operating supply voltage range
Symbol
V
CC
V
CC
op
Conditions
Ratings
3.0
1.8 to 3.6
Unit
V
V
Operating Characteristics
at Ta = 25 擄C, V
CC
= 3.0 V, f = 1 kHz, 0.775 V = 0 dBm,
R
L
= 10 k鈩?(preamplifier), R
L
= 16
鈩?/div>
(power amplifier)
Parameter
[Pre + Power]
Quiescent current
Voltage gain (Closed)
Symbol
I
CCO
VG
T
Output
Rg = 2.2 k鈩?(preamplifer) V
IN
= 0 V
V
O
= 鈥? dBm
min
typ
17
68
max
27
71
Unit
mA
dB
65
Continued on next page.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
22896HA(II) No.3535-1/8
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