User Manual
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V 1.0
2021-08-25
XDPP1100 technical reference manual
Digital power controller
Telemetry
Peripheral Field name
Access Address
Bits
Description
7000_3818h
(Loop 1)
LSB = 2^-12 V/V, range = 0.0 to
0.9998 V/V
telem
tlm_iout_fs
R
7000_341Ch
(Loop 0)
7000_381Ch
(Loop 1)
[12:0]
Unfiltered, cycle-averaged output
current updated at F
switch
rate.
LSB = 62.5 mA, range = -256 to
+255.9375 A
telem
tlm_iout_fsw
R
7000_3420h
(Loop 0)
7000_3820h
(Loop 1)
[12:0]
Low-pass filtered output current
telemetry updated at F
switch
rate.
PMBus command computed by
FW as follows:
READ_IOUT(S9.2) =
tlm_iout_fsw[12:2]
LSB = 62.5 mA, range = -256 to
+255.9375 A
telem
tlm_vin_force
RW
7000_3424h
(Loop 0)
7000_3824h
(Loop 1)
[10:0]
Forced V
IN
input value. Selected as
source for V
IN
by tlm_vin_src_sel.
Can be used by FW to bypass the
HW-based V
IN
computation.
LSB = 62.5 mV, range = 0.0 to
127.9375 V
telem
tlm_vin_convert_factor
RW
7000_3428h
(Loop 0)
7000_3828h
(Loop 1)
[21:0]
Conversion factor for computing V
IN
from the measured VSADC output.
It consists of three components:
scaling for the V
RECT
resistor divider,
scaling for the
transformer/topology and shifting
the binary point from the ADC
representation (1.25 mV) to 1 V.
Computed by FW from PMBus
commands as follows:
exp1 = $signed(MFR_VRECT_SCALE
[15:11]), exp=-10, -11, -12
supported
exp2 =
$signed(MFR_TRANSFORMER_
SCALE[15:11]), exp=-10, -11, -12
supported
prod1(U0.14) =
MFR_VRECT_SCALE[9:0] *
MFR_TRANSFORMER_SCALE[9:0] /
2^(-14-exp1-exp2)
quot1(U7.8) = 2^22 / prod1(U0.14),
clamp to 2^15-1
tlm_vin_convert_factor(U-2.24) =
quot1(U7.8) * 82(U-9.16)
LSB = 2^-24, range = 0.0 to 0.2500
telem
tlm_vin_lpf
R
7000_342Ch
(Loop 0)
[10:0]
Low-pass filtered input voltage
telemetry.
PMBus command computed by
