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

2. 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

3. TI Information – Selective Disclosure
Closed-loop TAS5710
Prescalar: 0x57 00AB 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

4. TI Information – Selective Disclosure
Open-loop TAS5709
Prescalar: 0x57 002B 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

5. TI Information – Selective Disclosure