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LM4880L-D08-T Datasheet(PDF) 4 Page - Unisonic Technologies |
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LM4880L-D08-T Datasheet(HTML) 4 Page - Unisonic Technologies |
4 / 11 page LM4880 CMOS IC UNISONICTECHNOLOGIESCO.,LTD 4 of 11 www.unisonic.com.tw QW-R502-033. E TYPICAL APPLICATION Bias + + 1 7 OUT A OUT B Shutdown Bypass IN B 6 3 5 2 + + - + - + IN A GND + 4 8 RI 20kΩ Audio Input Audio Input RI 20kΩ VDD/2 50kΩ CS 0.1µF RF 20kΩ + VDD CO RL 8Ω or 32Ω 50kΩ CO CB 1.0µF CI CI RF 20kΩ Fig. 1 Typical Audio Amplifier Application Circuit 15kΩ 15kΩ RL 8Ω or 32Ω EXTERNAL COMPONENTS DESCRIPTION (Fig. 1) COMPONENTS FUNCTIONAL DESCRIPTION 1. RI Inverting input resistance which sets the closed-loop gain in conjunction with RF. This resistor also forms a high pass filter with CI at fC = 1/(2πRICI). 2. CI Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a high pass filter with RI at fC = 1/(2πRICI). 3. RF Feedback resistance which sets closed-loop gain in conjunction with RI. 4. CS Supply bypass capacitor which provides power supply filtering. 5. CB Bypass pin capacitor which provides half-supply filtering. 6. CO Output coupling capacitor which blocks the DC voltage at the amplifier’s output. Forms a high pass filter with RL at fO = 1/(2πRLCO). |
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