器件名称: AD1991ASVRL
功能描述: Class D/1-Bit Audio Power Output Stage
文件大小: 194.9KB 共11页
简 介:Class D/1-Bit Audio Power Output Stage 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 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 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 PROTECTION SHORT-CIRCUIT PROTECTION MUTE CONTROL
4 AGND DGND
2 TEST CONTROL
4-Channel Mode
AVDD DVDD PVDD 6
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 provides turn-on and turn-off pop suppression, short-circuit protection, and overtemperature shutdown. To control the IC, a power-down/reset in……
