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TPA3007D1PW Fiches technique(PDF) 10 Page - Texas Instruments |
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TPA3007D1PW Fiches technique(HTML) 10 Page - Texas Instruments |
10 / 20 page www.ti.com APPLICATION INFORMATION APPLICATION CIRCUIT INN INP GAIN0 SHUTDOWN PGND VCLAMP BSN PVCC OUTN OUTN PGND VCC VREF BYPASS COSC ROSC AGND AGND BSP PVCC OUTP GAIN1 OUTP PGND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 R3 51 Ω C9 0.22 µF C6 1 µF D1 VCC C12 220 pF C11 1 µF C3 1 µF C4 1 µF VCC L2 (Ferrite Bead) L1 (Ferrite Bead) C15 1 nF C14 1 nF D2 R2 51 Ω C8 0.22 µF C5 1 µF C7 10 µF C10 1 µF C1 0.47 µF C2 0.47 µF IN− IN+ GAIN SELECT GAIN SELECT SHUTDOWN CONTROL U1 TPA3007D1 L1, L2: Fair-Rite, Part Number 2512067007Y3 D1, D2: Diodes, Inc., Part Number B130 VCC R1 120 k Ω CLASS-D OPERATION TRADITIONAL CLASS-D MODULATION SCHEME TPA3007D1 SLOS418A – SEPTEMBER 2003 – REVISED DECEMBER 2004 Figure 13. Typical Application Circuit This section focuses on the class-D operation of the TPA3007D1. The traditional class-D modulation scheme, which is used in the TPA032D0x family, has a differential output where each output is 180 degrees out of phase and changes from ground to the supply voltage, VCC. Therefore, the differential prefiltered output varies between positive and negative VCC, where filtered 50% duty cycle yields 0 V across the load. The traditional class-D modulation scheme with voltage and current waveforms is shown in Figure 14. Note that even at an average of 0 V across the load (50% duty cycle), the current to the load is high, causing high loss, thus causing a high supply current. 10 |
Numéro de pièce similaire - TPA3007D1PW |
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Description similaire - TPA3007D1PW |
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