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TDA2050 Scheda tecnica(PDF) 5 Page - STMicroelectronics |
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TDA2050 Scheda tecnica(HTML) 5 Page - STMicroelectronics |
5 / 13 page SPLIT SUPPLY APPLICATION SUGGESTIONS The recommended values of the external compo- nents are those shown on the application circuit of fig. 2. Different values can be used. The follow- ing table can help the designer. Component Recommended Value Purpose Larger than Recommended Value Smaller than Recommended Value R1 22k Ω Input Impedance Increase of Input Impedance Decrease of Input Impedance R2 680 Ω Feedback Resistor Decrease of Gain (*) Increase of Gain R3 22k Ω Increase of Gain Decrease of Gain (*) R4 2.2 Ω Frequency Stability Danger of Oscillations C1 1 µF Input Decoupling DC Higher Low-frequency cut-off C2 22 µF Inverting Input DC Decoupling Increase of Switch ON/OFF Noise Higher Low-frequency cut-off C3 C4 100nF Supply Voltage Bypass Danger of Oscillations C5 C6 220 µF Supply Voltage Bypass Danger of Oscillations C7 0.47 µF Frequency Stability Danger of Oscillations (*) The gain must be higher than 24dB PRINTED CIRCUIT BOARD The layout shown in fig. 2 should be adopted by the designers. If different layouts are used, the ground points of input 1 and input 2 must be well decoupled from the ground return of the output in which a high current flows. TDA2050 5/13 |
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