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发布者:微桥 发布时间:2011-11-23 阅读:4317次    关键字: 音频功放
AD52650-2.5W Stereo Class-D Audio Amplifier


AD52650-2.5W/CH Stereo Filter-less Class-D Audio Amplifier DataSheet 

Features
􀁺 Supply voltage range: 2.5 V to 5.5 V
􀁺 Support single-ended or differential analog input
􀁺 Low static operation current
􀁺 Low shut-down current
􀁺 Short power-on transient time
􀁺 Two volume control modes
􀂄 DC volume control from -38dB to +20dB
􀂄 4-step volume gain of +6, +12, +18, +24dB
􀁺 Independent shut-down control for left or right channel
􀁺 Short-circuit and thermal protection
􀁺 Loudspeaker power within 10% THD+N
􀂄 1.5W/ch into 8Ω loudspeaker
􀂄 2.5W/ch into 4Ω loudspeaker
􀁺 Loudspeaker efficiency
􀂄 90% @ 8Ω, Po,10% THD+N
􀂄 85% @ 4Ω, Po,10% THD+N

Applications
􀁺 Monitor audio
􀁺 PDA
􀁺 Portable multimedia devices
􀁺 Notebook computer
􀁺 Mobile phone

Description
    The AD52650 is a stereo, filter-less class-D audio amplifier. Operating with 5.0V loudspeaker driver supply, it can deliver 2.5W/CH output power into 4 Ω loudspeaker within 10% THD+N.
    The AD52650 has two volume control modes by setting MODE pin. While MODE pin is set logic high, AD52650 is in DC volume control mode with 31-step volume gain from -38 dB to +20dB, adjusted by the DC voltage applied on G0 pin. Otherwise, AD52650 is the 4-step volume gain mode with +6dB, +12dB, +18dB, and +24dB gain, selected by setting G0 and G1 pins. The two volume adjustment modes aredesigned to fit the different volume control requirements in various applications.
    The AD52650 packaged as E-TSSOP 24L is a stereo audio amplifier with high efficiency, which leads to longer battery life, less heat sink requirement, smaller board size and lower system cost, and suitable for the notebook computer, and
portable multimedia devices. With the independent shut-down control for left or right channel, the AD52650 is more convenient to control the left and
right channels.

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