TI Information – Selective Disclosure Prescalar – Postscalar Open-loop and Closed-loop Settings

TI Information – Selective Disclosure WHY PRES-SCALAR – POST-SCALAR What is it? –Pre-scalar has digital headroom of +24dB without clipping –Post-scalar can be adjusted to the desire distortion for increased power over the full scale input. What is it for? –By increasing the input signal over the full scale (clipped signal) in the pre-scalar block and then adjusting the output the desired distortion in the post-scalar block: The distortion level is independent of PVCC The distortion level is also maintained in post-scalar block, i.e. in a certain range the post-scalar block can be adjusted so that the output amplitude changes but the distortion level stays constant

TI Information – Selective Disclosure Closed-loop TAS5710 Prescalar:0x5700AB AAAA Postscalar:0x Input:13 VDC, full scale digital Load:8 Ohm Output:8W, 10% THD+N 1kHz – 8W – 10% THD+N 15kHz – 8W – 10% THD+N

TI Information – Selective Disclosure Open-loop TAS5709 Prescalar:0x57002B 0000 Postscalar:0x B000 Input:13 VDC, full scale digital Load:8 Ohm Output:8W, 10% THD+N 1kHz – 8W – 10% THD+N 15kHz – 8W – 10% THD+N

TI Information – Selective Disclosure