BA3571F

BA3571F Audio ICs Headphone driver for portable CD players BA3571F The BA3571F is headphone drivers designed for portable CD players. An oscillation damper is not needed at the headphone output, minimizing external components. Includes a bass boost circuit which enables setting of the bass boost with external components. !Applications Portable CD players !Features 1) An external oscillation damper is not needed. 2) Includes a bass boost circuit making it possible to set the bass boost with attached components. !Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 5.5 550 *1 -25~+75 -55~+125 Unit V mW ˚C ˚C *1 Reduced by 5.5mW for each increase in Ta of 1˚C over 25˚C. !Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol VCC Min. 2.0 Typ. Max. 5.5 Unit V BA3571F Audio ICs !Block diagram 11 VCC GND Vcc 1 10 9 8 BB SW 6 7 5 4 2 3 1 Power GND Out 1 12 Out 2 Vcc 2 13 τ 14 NC BB SW τ NC 15 BB SW Ripple Filter RF1 16 17 50k LP Out NC 39k LP NF IN 1 18 IN 2 Bias in 19 VCC LP IN Bias out Pre GND 20 Pre GND BA3571F Audio ICs !Electrical characteristics _ (unless otherwise noted, Ta = 25°C, VCC = 3V, RL = 16Ω, and f = 1kHz; measurement circuit shown in Fig.1) Parameter Quiescent current Voltage gain 1 Voltage gain 2 Rated output power Total harmonic distortion Channel balance Output noise voltage 1 Output no...