PT2338 150mw stereo audio power amplifier tel: 886-66296288 ? fax: 886-29174598 ? http://www.princeton.com.tw ? 2f, 233-1, baociao road, si ndian, taipei 23145, taiwan description the PT2338 is a stereo power amplifier designed for the audio equipment; it is possible to delivery up to 150mw power to the 16 ? loads. overall voltage gain is determine by the external resistors, for some application needs higher common mode reject performance to canceling common mode noises, the input port of the PT2338 is configuration as differential input. very low quiescent current and low voltage operation capability let it become a best choice for the portable audio application. applications ? portable media player ? wireless headset ? mobile phone ? lcd tv ? mini compo ? pc audio ? other audio applications features ? cmos processing ? stereo differential inputs ? wide operation range: from 2.5v to 5.5v ? driving capability up to 16 ? headphone ? low quiescent current:1.5ma ? pop noise free circuitry ? thermal and short-circuit protection ? low harmonic distortion and low residual noise ? available in 10 pins, msop small outline package block diagram amp 2 amp 1 bias control 1 2 3 4 56 7 8 9 10 350k 350k
PT2338 v1.0 2 application circuit diagram single ended configuration amp 2 amp 1 bias control 1 2 3 4 56 7 8 9 10 350k 350k ip1 ip2 in1 in2 vo1 vo2 vdd gnd bypass sd r2a 100k r2c 100k r2d 100k r2b 100k r1a 100k r1b 100k r1c 100k r1d 100k cby pa ss 1uf hi=shutdown on vdd cs 1uf vdd co1 220uf co2 220uf lch rch ci 0.47uf ci 0.47uf ci 0.47uf ci 0.47uf l r g ri n lin 2 1 3 note : 1. single-ended inverted amplifier configuration can get the better performance of the psrr. 2. increase the capacitance of the cbypass can improve the ps rr performance, but it also extends power on muting period. differential input configuration amp 2 amp 1 bias control 1 2 3 4 56 7 8 9 10 350k 350k ip1 ip2 in1 in2 vo1 vo2 vdd gnd bypass sd r2a 100k r2c 100k r2d 100k r2b 100k r1a 100k r1b 100k r1c 100k r1d 100k cby pa ss 1uf hi=shutdown on vdd cs 1uf vdd co1 220uf co2 220uf lch rch ci 0.47uf ci 0.47uf ci 0.47uf ci 0.47uf l r g lin+ ri n+ ri n- lin- 2 1 3
PT2338 v1.0 3 order information valid part number package type top code PT2338-ms 10 pins, msop PT2338-ms pin configuration pin description pin name i/o description pin no. vo1 o audio output for channel 1 1 in1 i negative input for channel 1 2 ip1 i positive input for channel 1 3 bypass i internal mid-supply voltage bypassing 4 gnd - ground 5 sd i put the device in low quiescent current mode when held high 6 ip2 i positive input for channel 2 7 in2 i negative input for channel 2 8 vo2 o audio output for channel 9 vdd - supply voltage terminal 10
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