11 tracking power supply control (address 0eh), 1 tracking power supply mode, 2 tracking power supply offset – Cirrus Logic CS4234 User Manual
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DS899F1
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CS4234
6.11 Tracking Power Supply Control (Address 0Eh)
6.11.1
Tracking Power Supply Mode
If DAC5 FLTR (
) is set to Tracking Power Supply Mode, setting this bit changes the refer-
ence of the DAC5 output from 0 V to full-scale output voltage. This feature is used when the topology of
the power supply decreases output signal as the reference signal is increased, and increases its output
signal when the reference signal is decreased. If DAC5 FLTR is not set to Tracking Power Supply Mode,
setting this bit inverts the DAC5 output.
6.11.2
Tracking Power Supply Offset
Determines the DC offset is added to the DAC5 output. The DC offset value changes proportionally to VA
changes. Note when TPS Mode = 1 and TPS Gain = 1, the DC offset amount is double the values listed
in the table.
7
6
5
4
3
2
1
0
TPS MODE
TPS OFFSET[2:0]
GROUP DELAY[3:0]
TPS MODE
Output of DAC5 is referenced to:
0
0 VDREGC
1
Full Scale
TPS OFFSET
DC Offset on DAC5 output [% of Full Scale]:
000
0
001
3
010
6
011
9
100
12
101
15
110
18
111
21