TA2120FN

TOSHIBA Bipolar Linear Integrated Circuit SIlicon Monolithic TA2120FN TA2120FN Low Consumption Current Stereo Headphone Power Amplifier for Portable CD (3V Use) The TA2120FN is a low consumption current stereo headphone power amplifier developed for portable CD players (3V). This IC has active bass boost, output limiter, input pin for beep sound. Features · Low consumption current: ICCQ = 1.9 mA (C-CUP) (typ.) ICCQ = 2.6 mA (OCL) (typ.) · Two kinds of gain mode available: GV = 16dB or 8.5dB · Output power (VCC = 2.0 V, f = 1 kHz, THD = 10%, RL = 16 Ω) Po = 8 mW (typ.) · Low noise: Vno = −98dBV (typ.) Weight: 0.14 g (typ.) · Built-in the center amplifier ON/OFF function. (Favorable for low dissipation current in the C-Couple output configuration) · Built-in active bass boost system · Built-in output limiter function · Input pin for beep sound · Excellent ripple rejection ratio · Built-in capacitor for reducing buzz noise · Built-in power mute · Built-in a power on/off switch · Operating supply voltage range (Ta = 25°C): VCC = 1.8~4.5 V 1 2002-04-19 Block Diagram TA2120FN BIAS VCC VCC BEEP OFF BST ON SW PW MT SW SW ON ON OFF OFF ON OFF ATT SW 24 23 22 21 20 19 18 17 16 15 14 13 BST BST BIAS BIAS PW MT MT BEEP GND INB INA ATT OUT SW IN SW SW TC IN SW BIAS PW MT SW SW BBEeEepP OUTB OUTA ALC ALC ATT SW ADDB BST ADDA PWC SW PW PW PW A BC ALC DET BST ADD NF OUT RF IN PWC SW PWR MIX VCC OUTB OUTC OUTA GND OUT ALC IN ALC DET 1 2 3 4...