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发布者:微桥PT5321 发布时间:2010/12/1 阅读:4874次    关键字: PT5321 微桥 音频功放 Audio Amplifier
PT5321-带3D增强立体声音效功能的双模式2.2W音频功率放大器


PT5321-Dual 2.1W Audio Amplifier Plus Stereo Headphone Function & 3D Enhancement PDF文档下载

 

PT5321-带3D增强立体声音效功能的双模式2.2W音频功率放大器

GENERAL DESCRIPTION
 

The PT5321 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4Ω load or 2.4W to a 3Ω load with less than 1.0% THD+N. In addition, the headphone input pin allows the amplifiers to operate in single-ended mode when driving stereo headphones.

The PT5321 has two separate HP (headphone) enable inputs, each having different logic level thresholds. Either HP enable input activates the single ended headphone mode and disables the BTL output mode. The HP Sense input is for use with a normal stereo headphone jack. The remaining input, HP Logic, accepts standard logic level thresholds. The PT5321 provides a user selectable “3D Enhancement” mode to enhance stereo imaging.

The PT5321 features a low-power consumption shutdown mode and thermal shutdown protection. It also utilizes circuitry to reduce “pop and click” during device turn-on.
 
FEATURES
 

¨          PO@1% THD+N:

¨          3Ω, 4Ω loads:      2.5W (typ), 2.2W (typ)

¨          8Ω load:       1.1W (typ)

¨          SE mode THD+N@75mW into 32Ω: 0.01% (max)

¨          Shutdown current:       0.7µA (typ)

¨          Supply voltage range: 2.5V to 5.5V

¨          PSRR@217Hz:           85dB (typ)

¨          Selectable headphone enable modes

¨          3D Enhancement

¨          Stereo headphone amplifier mode

¨          “Click and pop” suppression circuitry

¨          Unity-gain stable

¨          Thermal shutdown protection circuitry

¨          PCB area-saving QFN-24 package
 
APPLICATIONS
 

¨          Cell phones

¨          Multimedia monitors

¨          Portable and desktop computers

¨          Portable audio systems
 
TYPICAL APPLICATIONS
 

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