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TAS5756M Datasheet(PDF) 49 Page - Texas Instruments |
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TAS5756M Datasheet(HTML) 49 Page - Texas Instruments |
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49 / 104 page ![]() OUTP OUTN OUTP -OUTN Speaker Current OUTP OUTN OUTP-OUTN Speaker Current OUTP OUTN OUTP -OUTN Speaker Current 0 V 0 V PVCC No Output Positive Output Negative Output 0 A 0 A 0 V - PVCC TAS5756M www.ti.com SLAS988B – JUNE 2014 – REVISED AUGUST 2015 8.3.4 Modulation Scheme 8.3.4.1 BD-Modulation The TAS5756M uses BD modulation. This modulation scheme allows operation without the classic LC output filter when the amp is driving an inductive load with short speaker wires. Each output is switching from 0 volts to the supply voltage PVDD. The SPK_OUTx+ and SPK_OUTx- are in phase with each other with no input signal so that there is little or no current in the speaker. The duty cycle of SPK_OUTx+ is greater than 50% and SPK_OUTx- is less than 50% for positive output voltages. The duty cycle of SPK_OUTx+ is less than 50% and SPK_OUTx- is greater than 50% for negative output voltages. The voltage across the load remains at 0 V throughout most of the switching period, reducing the switching current, which reduces any I2R losses in the load. Figure 71. BD-Modulation Copyright © 2014–2015, Texas Instruments Incorporated Submit Documentation Feedback 49 Product Folder Links: TAS5756M |
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