AmplifierCircuits

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  Clickless Mute Function Turn-On and Turn-Off Pop Suppression Short-Circuit Protection Overtemperature Protection Data Loss Protection 2-Channel BTL Outputs or 4-Channel Single-Ended Outputs 52-Lead Exposed Pad TQFP Package Low Cost DMOS Process APPLICATIONS: PC Audio Systems Minicomponents Automotive Amplifiers Home Theater Systems Televisions GENERAL DESCRIPTION: The AD1991 is a 2-channel BTL or 4-channel single-ended  class D audio power output stage. The part is configured during  reset to be in either 2-channel mode or 4-channel mode.  To protect the IC as well as the connected speakers, the AD1991  pr...