AD1991 - Class D/1-Bit Audio Power Output Stage
FUNCTIONAL BLOCK DIAGRAMS 2-Channel Mode AVDD DVDD PVDD 6 OUTA INA LEFT INPUT A1 A2 3 INB B1 B2 LEVEL SHIFTER AND SWITCH CONTROL H-BRIDGE OUTB 3 OUTC INC RIGHT INPUT C1 C2 3 IND D1 OUTD D2 3 CURRENT OVERLOAD THERMAL SHUTDOWN THERMAL WARNING DATA LOSS 14 PGND CLK RST/PDN MUTE ،n THERMAL PRO
AD1991 Features
* Class D/1-Bit Audio Power Output Stage 5 V Analog and Digital Supply Voltages Power Stage Power Supply 8 V to 20 V Output Power @ 0.1% THD + N Stereo Mode 2 ؋ 20 W @ 4 ⍀ @ 14.4 V 2 ؋ 20 W @ 8 ⍀ @ 20 V Mono Mode 1 ؋ 40 W @ 4 ⍀ @ 20 V RON < 320 m⍀ (per Transistor) Efficiency > 85% @ Full Power/8 ⍀ Cli
