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.
¨ 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
¨ Cell phones
¨ Multimedia monitors
¨ Portable and desktop computers
¨ Portable audio systems