Ordering number: EN3535A
Monolithic Linear IC
LA4581MB Preamplifier + Power Amplifier for 3V Headphone Stereos
The LA4581MB is an auto reverse-supported preamplifier + power amplifier IC that is intended for use in 3V headphone stereos.
unit : mm
. 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 Vref 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.
SANYO : MFP24S
Specifications Maximum Ratings at Ta = 25 °C Parameter
Maximum supply voltage
Allowable power dissipation Operating temperature
–20 to +75
–40 to +125
Operating Conditions at Ta = 25 °C Parameter
Recommended supply voltage Operating supply voltage range
1.8 to 3.6
Operating Characteristics at Ta = 25 °C, VCC = 3.0 V, f = 1 kHz, 0.775 V = 0 dBm, RL = 10 kΩ (preamplifier), RL = 16 Ω (power amplifier) Parameter [Pre + Power] Quiescent current Voltage gain (Closed)
Symbol ICCO VGT
Output Rg = 2.2 kΩ (preamplifer) VIN = 0 V VO = –5 dBm
Continued on next page.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 22896HA(II) No.3535-1/8