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PA4863L-N20-T Datasheet(PDF) 5 Page - Unisonic Technologies |
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PA4863L-N20-T Datasheet(HTML) 5 Page - Unisonic Technologies |
5 / 11 page PA4863 CMOS IC UNISONICTECHNOLOGIESCO.,LTD 5 of 11 www.unisonic.com.tw QW-R502-120.C TYPICAL APPLICATION CIRCUIT SLEEVE AMP 1A VDD CS 0.1µF TANT RF 20KΩ RI 20KΩ Audio Input CI 1μF - + 20KΩ 20KΩ 20KΩ -OUT A 5 3 +OUT A RL 8Ω CO 100µF + 1kΩ To HP-IN Circuit 50KΩ 50KΩ VDD/2 -IN A +IN A Bypass -IN B +IN B Shutdown 1 16 GND 2,7,15 100KΩ 20KΩ RF 20KΩ CI 1μF Audio Input 100kΩ VDD To Control Pin on Headphone jack 20KΩ 20KΩ 20KΩ -OUT B +OUT B 12 14 RL 8Ω + 1kΩ CONTROL PIN HEADPHONE JACK TIP 10 11 9 8 6 4,13 AMP 1B - + AMP 2A - + AMP 2B - + HP-IN RING CB (CB size) 0.33μF + RI CO 100µF Note: Pin out shown for DIP-16. Refer to the PIN CONFIGURATION for the pin out of other packages. Figure 1.Typical Audio Amplifier Application Circuit EXTERNAL COMPONENTS DESCRIPTION Components Functional Description RI The inverting input resistance, along with RF, set the closed-loop gain. RI, along with CI form a high pass filter with fc=1/(2πRICI) CI The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. CI, along with RI, create a high pass filter with fc=1/(2πRICI). Refer to the section. Selecting Proper External Components, for an explanation of determine the value of CI. RF The feedback resistance, along with RI, set the closed-Ioop gain. CS The supply bypass capacitor. Refer to the Power Supply Bypassing section for information about properly placing and selecting the value of, this capacitor. CB The capacitor, CB, filters the half-supply voltage present on the Bypass pin. Refer to the Selecting Proper External Components section for information concerning proper placement and selecting CB’S value. |
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