Schematic Rev 1 - S2021 - Farris Matar
Project Path: MarsRover2021-hardware/Projects/48V-24V Buck Converter/Rev1/48V-24V Buck Converter
Link to schematic: https://github.com/uwrobotics/MarsRover2021-hardware/blob/master/Projects/48V-24V%20Buck%20Converter/Rev1/48V-24V%20Buck%20Converter/48V-24V%20Buck%20Converter.pdf
Datasheet: https://www.ti.com/lit/ds/symlink/lm5117.pdf?ts=1621470012181
WEBENCH Design: https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=9CAE84D568631494
Comments
May 19, 2021
May 21, 2021
Consider increasing this capacitors capacitance.
Consider improving all the capacitors Voltage rating
Consider trying to find part alternative with more units available
(edited)
May 23, 2021
Implemented Cindy's and Wolfgang's feedback
Todo:
Power rail indicator LEDs
Some review comments:
Rename the 48V net to VBAT (according the webench the input can vary 36V - 50.4V)
Show the MPN for the diode
Style: avoid 4-way connection points
→
→
Suggestion: add power rail indicator LEDs to Vin and Vout
Add test points to Vin, Vout, and GND
Replace R2, R3, R4, R7, C3, C9 with 0603 or 0805 package (some of them are 0201 right now which is extremely tiny and not hand-solderable!)
Warning: there's only 31 of the MOSFETs, 43 of the input bulk caps, and 6 of the output bulk caps on Digi-Key as of now... just be aware of the stocking
Buck IC missing designator number
Add a comment describing inductor specs. Example from a different schematic for reference: