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发布者:微桥PT5322 发布时间:2010-11-26 阅读:5189次    关键字: PT5322 PT5301 PT5302 PT5303 PT5304 PT5305 音频功放
PT5322-带立体声耳机的2.2W音频功率放大器


PT5322-Dual 2.2W Audio Amplifier plus Stereo Headphone Function PDF文档下载
 
 
GENERAL DESCRIPTION
 

The PT5322 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 PT5322 has a HP (headphone) enable input, which 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 PT5322 features a low-power consumption shutdown mode and thermal shutdown protection. It also utilizes circuitry to reduce “pop and click” during device turn-on. The PT5322 is available in a 20 pin TSSOP package.
 
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)

¨          Stereo headphone amplifier mode

¨          “Click and pop” suppression circuitry

¨          Unity-gain stable

¨          Thermal shutdown protection circuitry

¨          PCB area-saving TSSOP package
 
APPLICATIONS
 

¨          Cell phones

¨          Multimedia monitors

¨          Portable and desktop computers

¨          Portable audio systems
 
TYPICAL APPLICATIONS
 

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