TAS5715
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SLOS645 –AUGUST 2010
Bit 0: This is bit should be 1 if the headphone function is used in the TAS5715. If the headphone is not used, this
bit can be cleared to 0. Then if bit 1 is also set to 1, the TAS5715 drives the FAULTZ signal out on the A_SEL
pin. FAULTZ is the internal power-stage fault signal asserted low during errors like overcurrent, overtemperature,
and UVP.
Figure 46 shows the connection of A_SEL_HP_SDZ pin to headphone shutdown.
I2S Audio
Left
TAS5715
Right
(HP Amplifier)
HPL
RC
Filter
HPR
A_sel_HP_SDZ
Addr = 0x54
15 kΩ
B0424-01
Figure 46. Headphone Shutdown (HP_SD)
Digital THD Manager
The THD manager can be used to achieve digitally the {specified ?} THD levels without voltage clipping. This
allows the customer to achieve the same THD (for example, 10% THD) for different power levels (15 W/10 W/5
W) with same PVCC level.
The waveform of Figure 47 shows digital clipping using the THD manager.
Figure 47. Digital Clipping Using the THD Manager
Register 0x57 is used to achieve the clipping. Register 0x56 is used to scale the clipped waveform to get the
desired power out.
Copyright © 2010, Texas Instruments Incorporated
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