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AD1992ACPZ 데이터시트(PDF) 1 Page - Analog Devices |
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AD1992ACPZ 데이터시트(HTML) 1 Page - Analog Devices |
1 / 16 page Class-D Audio Power Amplifier Preliminary Technical Data AD1990/AD1992/AD1994/AD1996 Rev. PrA – 1/20/05 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. Specifications subject to change without notice. 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. 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 © 2005 Analog Devices, Inc. All rights reserved. FEATURES Integrated Stereo Modulator & Power Stage 0.005% THD+N 101.5dB Dynamic Range PSRR > 65 dB RDS-ON < 0.3 Ω (per transistor) Efficiency > 80% @ 5W/6 Ω EMI Optimized Modulator On-Off-Mute Pop Noise Suppression Short Circuit Protection Over-Temperature Protection Low Cost DMOS Process APPLICATIONS Flat Panel Televisions Automotive Amplifiers PC Audio Systems Mini Components GENERAL DESCRIPTION The AD199x is a two channel Bridge Tied Load (BTL) switching audio power amplifier with integrated ∑∆ modulator. The modulator accepts a 1Vrms input signal (maximum power) and generates a switching waveform to drive speakers directly. One of the two modulators can control both output stages providing twice the current for single-channel applications. A digital, microcontroller-compatible interface provides control of reset, mute and PGA gain as well as output signals for thermal and over-current error conditions. The output stage can operate from supply voltages ranging from 8V to 20V. The analog modulator and digital logic operate from a 5V supply. AD1990: 5Wx2 (10Wx1) AD199 2: 10Wx2 (20Wx1) AD199 4: 25Wx2 (50Wx1) AD199 6: 40Wx2 (80Wx1) PGND1 Σ∆ MODULATOR PGA LEFT CHANNEL VOLTAGE REFERENCE OSCILLATOR MODE CONTROL LOGIC MUTE/ POP CONTROL TEMPERATURE SENSE & OVER-CURRENT PROTECTION 19 29 17 30 49 18 7,8 4,5,6 1,2,3 9,10 11,12,13 14,15,16 55 27 28 22 21 20 41,42 43,44,45 46,47,48 39,40 36,37,38 33,34,35 50 51 60 53 31 32 62 63 PVDD OUTL+ PGND1 PVDD1 OUTL- PGND1 REF_FILT CLKI CLKO PVDD2 OUTR+ PGND2 PVDD2 OUTR- PGND2 AVDD AGND DVDD DGND 57 56 24,25 23,26 Ø1 Ø2 Ø1 Ø2 PGND2 PVDD2 PVDD2 PGND2 LEVEL SHIFT + DEAD TIME CONTROL Σ∆ MODULATOR PGA RIGHT CHANNEL DRIVER HIGH SIDE DRIVER LOW SIDE DRIVER HIGH SIDE DRIVER LOW SIDE DRIVER HIGH SIDE DRIVER LOW SIDE LEVEL SHIFT + DEAD TIME CONTROL Figure 1. Block Diagram |
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