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ISL78226EVKIT1Z, ISL78224EVKIT2Z
(8) Turn on the 12V supplies, 5V supplies, and the 48V supply (with no particular power supply sequence).
(9) The first time you power up the board after configuring the board for the Buck mode operation, verify the
operation is set to Buck mode.
(a) In the software, navigate to the Quick Access Control Panel under Mode Pin Selection.
(b) Select Buck mode from the BT/BK drop-down menu.
(c) Click the Enable button at the top of the Quick Access Control Panel. The indicator next to the Enable
button turns red.
(d) Verify the flyback circuit is working by measuring the voltages at V6 and V12 (see
connections and
If the V6 and V12 measurements are correct, the controller is running and providing the proper clock signal
to the flyback circuit. If the measurements are correct, proceed to Step 10.
If the V6 and V12 measurements are not correct, disable the part through the software, turn off all the
supplies, and recheck all the connections.
(10) To automatically start the converter, click the Read Startup Files Options button shown in
This loads the startup.csv file in the project directory that specifies startup options that set initial device
settings. Note: You can manually edit the file.
(11) Click Execute Startup. The program sets the initial device registers as well as the GUI controls and value
windows.
UG073 Rev.4.00
Jun 7, 2019
Table 3. ISL78224 Probe Connections to Monitor Phase Voltages
Jumper
TP
26
TP
27
TP
28
TP
29
N/A
N/A
Figure 56
for ISL78224 connections). V6 should measure about 6V and V12 around 12V.
Figure 18. Read Startup File Options
3. Functional Description
Phase
1
2
3
4
5
6
Figure 55
for ISL78226
Figure
18.
Page 16 of 105
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