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GMA7496LD20 Datasheet(PDF) 5 Page - Gamma Microelectronics Inc. |
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GMA7496LD20 Datasheet(HTML) 5 Page - Gamma Microelectronics Inc. |
5 / 11 page 5 APPLICATION SUGGESTIONS The recommended values of the external components are those shown on the application circuit of figure 1A. Different values can be used, the following table reference for the designer. Component Suggestion Value Purpose Larger than Suggestion Smaller than Suggestion R1 P1 C1 C5 C6 C7 C8 C9 C2 C3 C4 R2 300k 50k 1000µF 100nF 1000µF 1µF 1000µF 100nF 470nF 470nF 470µF 10k Volume control Circuit Volume control Circuit Supply voltage bypass Volume control time costant Output DC decoupling Mute time costant Output DC decoupling Supply voltage bypass Input DC decoupling Input DC decoupling Ripple rejection Mute time control Larger volume regulation time Larger mute on/ off time Smaller volume regulation time Smaller mute on/ off time Danger of oscillation Smaller volume regulation time Higher low frequency cutoff Smaller mute on/ off time Higher low frequency cutoff Danger of oscillation Higher low frequency cutoff Higher low frequency cutoff Worse SVR Lower low frequency cutoff Lower low frequency cutoff Better SVR Larger volume regulation time Lower Low frequency cutoff Larger mute on/ off time Lower low frequency futoff Volume OP-Amp + - MUTE/STBY PROTECTIONS 9 C2 470nF INR 30K Volume OP- Amp + - 30K C8 1000µF C6 1000µF R2 10K 4 C3 470nF INL 7 14 11 12 17 6 5 R1 300K C5 100nF Volume OUTR S1 STBY S2 MUTE OUTL 1,2,3,13, 18,19,20 C4 470µF SVR 10 VS Varout_R 15,16 C9 0.1µF C1 1000µF +VS PW_GND VOL P1 50K LOG +5V TP1 PW_GND PW_GND S_GND +5V +5V Varout_L 60K APPLICATION CIRCUIT C7 1µF A A MICROELECTRONICS GMA7496L Audio Amp. 2W+2W AMPLIFIER W/ DC VOLUME CONTROL |
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