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TPA0213DGQ Fiches technique(PDF) 9 Page - Texas Instruments |
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TPA0213DGQ Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 24 page TPA0213 2-W MONO AUDIO POWER AMPLIFIER WITH HEADPHONE DRIVE SLOS276D – JANUARY 2000 – REVISED NOVEMBER 2002 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS –60 –100 –120 0 –20 20 100 1k 10k 20k f – Frequency – Hz POWER SUPPLY REJECTION RATIO vs FREQUENCY CB = 0.47 µF –40 –80 VDD = 5 V Stereo/SE Gain = 1.9 dB CB = 1 µF Bypass = 2.5 V Figure 13 APPLICATION INFORMATION gain setting via input resistance The gain of the input stage is set by the user-selected input resistor and a 50-k Ω internal feedback resistor. However, the power stage is internally configured with a gain of –1.25 V/V in SE mode, and –2.5 V/V in BTL mode. Thus, the feedback resistor (RF) is effectively 62.5 kΩ in SE mode and 125 kΩ in BTL mode. Therefore, the overall gain can be calculated using equations (1) and (2). (1) A V + –125 k W R I (BTL) (2) A V + –62.5 k W R I (SE) The –3 dB frequency can be calculated using equation 3: (3) ƒ –3dB + 1 2 p R I C i If the filter must be more accurate, the value of the capacitor should be increased while the value of the resistor to ground should be decreased. In addition, the order of the filter could be increased. |
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Description similaire - TPA0213DGQ |
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