DatasheetsPDF.com

AD1991 Dataheets PDF



Part Number AD1991
Manufacturers Analog Devices
Logo Analog Devices
Description Class D/1-Bit Audio Power Output Stage
Datasheet AD1991 DatasheetAD1991 Datasheet (PDF)

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 .

  AD1991   AD1991


Document
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 input and a mute pin are available. The output stage can be operated over a power supply range from 8 V to 20 V. In 2-channel mode, Transistors A1, B2, C1, and D2 are turned on by a Logic 1 on inputs INA and INC, and Transistors A2, B1, C2, and D1 are turned on by a Logic 0 on inputs INA and INC. In 4-channel mode, Transistors A1, B1, C1, and D1 are turned on by a Logic 1 on the four inputs, and Transistors A2, B2, C2, and D2 are turned on by a Logic 0 on the four inputs (see the Functional Block Diagrams). INA A1 A2 OUTA 3 LOAD REQUIRING DC VOLTAGE SUPPLY INB B1 B2 LEVEL SHIFTER AND SWITCH CONTROL H-BRIDGE OUTB 3 INC C1 C2 OUTC 3 IND D1 D2 OUTD 3 LOAD REQUIRING DC VOLTAGE SUPPLY CLK RST/PDN MUTE ،n THERMAL PROTECTION SHORT-CIRCUIT PROTECTION MUTE CONTROL CURRENT OVERLOAD THERMAL SHUTDOWN THERMAL WARNING DATA LOSS 14 REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. 4 AGND DGND 2 TEST CONTROL PGND One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. (AV = 5 V, DV = 5 V, PV = 20 V, Ambient Temperature = 25؇C, Impedance = 8 ⍀, unless otherwise noted.) AD1991–SPECIFICATIONS1 Load DD DD DDX Parameter OUTPUT POWER PO (f = 1 kHz SINE WAVE) EFFICIENCY RON Per High-Side Transistor Per Low-Side Transistor Temperature Coefficient THERMAL WARNING ACTIVE THERMAL SHUTDOWN ACTIVE OVERCURRENT SHUTDOWN ACTIVE POWER SUPPLIES Supply Voltage AVDD Supply Voltage DVDD Supply Voltage PVDDX Power-Down Current AVDD DVDD PVDDX Operating Current AVDD DVDD PVDDX DIGITAL I/O Input Voltage High Input Voltage Low Output Voltage High Output Voltage Low Leakage Current on Digital Inputs NOTES 1 Performance of both channels is identical. 2 Measurement requires PWM modulator. Specifications subject to change without notice. 2 Min Typ 20 20 87 260 190 0.7 135 150 5 5.0 5.0 8 to 20 6 1 17 1.8 4 40 Max Unit W W % Test Conditions RL = 4 Ω, PVDDX = 14 V RL = 8 Ω, PVDDX = 20 V f = 1 kHz, PO = 20 W, RL = 8 Ω @1A @1A Die temperature Die temperature 320 235 3.8 4.5 4.5 6.5 6.75 5.5 5.5 22.5 14 13 mΩ mΩ mΩ/°C °C °C A V V V µA µA µA mA mA mA RST/PDN held low RST/PDN held low RST/PDN held low 2.75 5.2 50:50 384 kHz square wave on INA and INC 2.0 DVDD – 0.8 DVDD 1.2 0.4 10 V V V V µA @ 2 mA @ 2 mA DIGITAL TIMING CHARACTERISTICS Symbol tPDL tPST tNOL tPDRP tMSU tMH tMPDL Parameter (Guaranteed over –40؇C to +85؇C, AVDD = DVDD = 5 V ؎ 10%, PVDDX = 20 V ؎ 10%, Edge Speed = Slowest, Nonoverlap Time = Shortest.) Min Typ 3.5 25 to 40 20 5 5 3 Max 30 Unit ns ns ns ns ns ns ␮s Input transition to output initial response Power transistor switching time Nonoverlap time RST/PDN minimum low pulsewidth Mode pin setup time before RST/PDN going high Mode pin hold time after RST/PDN going high MUTE asserted to output initial response Specifications subject to change without notice. –2– REV. 0 AD1991 INA tPST tPST tPST tPST tNOL tPDL tPDL tNOL OUTA OUTB Figure 1. Output Timing RST/PDN tPDRP MODEx tMSU tMH Figure 2. RESET and Mode Timing.


AD1985 AD1991 AD203SN


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)