Asynchronous Buck Converter - Wolfspeed SPEEDVAL KIT HALF-BRIDGE MOD-MB-HB-0900V-40A User Manual

8.4. ASYNCHRONOUS BUCK CONVERTER

F
IGURE
 Connect buck/boost filter board to the motherboard using the 5 screws and terminal nuts on
the motherboard (Figure 46).
 Plug the fan from the buck/boost filter board into the motherboard.
SELECT A CONTROL OPTION
1. External Function Generator
 Connect function generator to "HS IN" connector
 Set the two 3-pin jumpers near the BNC connectors to the "BNC" setting
 Ensure dead-time is provided between the input signals. 200 ns minimum is a
recommended starting point.
 Turn on the fan switch before running, and ensure both fans are operating
2. Control Card
 Plug a control card into the control card slot. Ensure firmware has been loaded per
instructions in user guide.
 Connect control card to PC to operate the program
 Attach the voltage feedback cable between the buck/boost filter board and
motherboard
 Set the two 3-pin jumpers near the BNC connectors to the "CTRLR" setting
 Fans should operate automatically when testing starts. Ensure both fans are
operating.
PRD-06829 REV. 1, December 2022
© 2022 Wolfspeed, Inc. All rights reserved. Wolfspeed® and the Wolfstreak logo are registered trademarks and the
SpeedVal Kit™ and Wolfspeed logo is a trademark of Wolfspeed, Inc. Other trademarks, product and company names
are the property of their respective owners and do not imply specific product and/or vendor endorsement,
sponsorship or association.
46: C D
ONENCTION IAGRAM FOR
SpeedVal Kit™ Half-Bridge User Guide
A B C
SYNCHRONOUS UCK ONVERTER
47