LA4581MB Datasheet, PDF (1/8 Pages) Sanyo Semicon Device – Preamplifier Power Amplifier for 3V Headphone Stereos

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.
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 (r₀ = 10 Ω) is built in, the virtual
grounding impedance is about 10 Ω. This eliminates the
. need for a large capacitor.
8 Ω speaker drivable.
Package Dimensions
unit : mm
3112-MFP24S
[LA4581MB]
SANYO : MFP24S
Specifications
Maximum Ratings at Ta = 25 °C
Parameter
Maximum supply voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V_CC max
Pd max
Topr
Tstg
Operating Conditions at Ta = 25 °C
Conditions
Ratings
Unit
4.5
V
530
mW
–20 to +75
°C
–40 to +125
°C
Parameter
Recommended supply voltage
Operating supply voltage range
Symbol
V_CC
V_CC op
Conditions
Ratings
Unit
3.0
V
1.8 to 3.6
V
Operating Characteristics at Ta = 25 °C, V_CC = 3.0 V, f = 1 kHz, 0.775 V = 0 dBm,
R_L = 10 kΩ (preamplifier), R_L = 16 Ω (power amplifier)
Parameter
[Pre + Power]
Quiescent current
Voltage gain (Closed)
Symbol
Output
I_CCO
VG_T
Rg = 2.2 kΩ (preamplifer) V_IN = 0 V
V_O = –5 dBm
min typ max Unit
17 27 mA
65 68 71 dB
Continued on next page.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
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22896HA(II) No.3535-1/8