UG-1571
User Guide
Rev. 0 | Page 14 of 18
Measure Load Regulation
After the VOUT1 board terminal voltage reaches 1.2 V,
increase the load current at VOUT1 before checking the voltage
between VOUT1 and GND with the voltage meter.
Measure Regulator Efficiency
The regulator efficiency is measured by dividing input power
by output power.
Change Buck Soft Start Time
Set the soft start time in the BUCK_SS bits in the
Buck Setting
box (see Figure 21).The default soft start time is 1 ms and users
must select a different soft start time. The soft start time options
are 1 ms (not recommended), 8 ms, 64 ms, and 512 ms.
BUCK BOOST REGULATOR EVALUATION
Set the EN_BUCKBST bit (see Figure 22) high to enable the
buck boost regulator.
The default buck boost regulator output voltage is 5 V.
Program the VOUT_BUCKBST bits (see Figure 22) to set the
output voltage.
20603
-022
Figure 22. GUI
Buck Boost Setting
in
BUCK & BCKBST Control
Tab
Measure Load Regulation
After the VOUT2 board terminal voltage reaches 5 V, increase
the load current at VOUT2, then check the voltage between the
on-board VOUT2 and GND.
Measure Regulator Efficiency
The efficiency is measured by dividing the input power by the
output power.
Change Buck Boost Soft Start Time
Set the soft start time for the BUCKBST_SS bits in the
Buck
Boost Setting
box (see Figure 22). The default soft start time is
1 ms and users must select a different soft start time. The soft
start time options are 1 ms (not recommended), 8 ms, 64 ms,
and 512 ms.
POWER SUPERVISORY EVALUATION
In the
Supervisory Setting
box (see Figure 23), set the EN_WD
bit high to enable the watchdog function. Program the watchdog
timeout through the WD_TIME bits (see Figure 23). Click the
RESET WD
button, located above the
WD_TIME
box, to
toggle the
watchdog.
2060
3-
023
Figure 23. GUI
Supervisory Setting
in
BUCK & BCKBST Control
Tab
Select V
OUT1
or V
OUT2
as the
monitor voltage rail and
use an oscilloscope to observe the RESET pin voltage (see
Figure 1).
