NJM2775A

www.DataSheet4U.com NJM2775A PRELIMINARY s PACKAGE OUTLINE PRE&HI-POWER AMPLIFIER with ALC for PORTABLE TAPE RECORDER s GENERAL DESCRIPTION The NJM2775A is a pre&power amplifier with ALC designed for micro and compact cassette recorders. It contains pre-amplifier, ALC circuit, power amplifiers, and ripple filter. The pre-amplifier amplifies the signal come from magnetic head. The ALC circuit limits the input signal to optimize level in recording. The power amplifiers drive a speaker in play back and the magnetic head in recording. The ripple filter stabilizing the supply voltage to the internal pre-amplifier and an external condenser microphone. The NJM2775A improves high output power compared with the NJM2128. It is suitable for portable tape recorder, and other portable playing back and recording recorder items. NJM2775AM s FEATURES qOperating Voltage qOperating Current qOutput Power qAutomatic Level Control (ALC) Limit Level qRipple Filter R.R. (Ripple Rejection) qBipolar Technology qPackage Outline V =1.8 to 6.0V 9mA typ. + 350mW typ. at V =3V,RL=4Ω,THD=10% 200mVrms typ., at f=1kHz 47dB typ., at f=200Hz,C=47µF + DMP16 s PIN CONFIGURATION 1 2 3 4 5 6 7 8 PRE+IN PRE-IN 16 15 14 13 12 11 10 9 SGND PRE AMP PREOUT POW+INA POWOUTA POWER AMPA POW-INA V+ POW-INB PGND POWER AMPB POW+INB POWOUTB RFOUT TC RIPPLE FILTER RFIN ALC ALCIN PIN FUNCTION 1.PRE +IN 2.SGND 3.POW +1NA 4.POW -INA 5.POW -INB 6.POW +INB 7.REFOUT 8.REFIN 9.ALCIN 10.TC 11.POW OUTB 12.PGND + ...