2023-07-11 Servo Module 12S Meeting notes

Missing ground in Overcurrent Protection ICs

Jack

• Done

Find bootstrap cap and Schottky diode with larger voltage rating

Jack

Bootstrap cap: https://www.digikey.ca/en/products/detail/kemet/C1206C104K2RAC7800/2215074

Sourced Schottky diode (:
https://www.digikey.ca/en/products/detail/vishay-general-semiconductor-diodes-division/V1PM12-M3-H/7427083

Tss timing + ss cap

Stanley

• New cap found, 0.68uF with 0805 package

• Altium project updated

Buffer Chips for PWM + DNP resistor in IO Schematic

Jerry

• Done

Add PN for IO connectors

Jerry

• Done

Input Capacitance

Stanley

• New input capacitors selected

• Altium project updated. New footprints should be reviewed

100K resistor for Vgs of FETs (DNP)

Jack

Revised to DNP after discussion with Daniel - not critical

Switching Frequency Justification

Stanley

• Added justification to project page

Inductor Current/Temp Rating

Stanley

• Added justification to project page

0 ohm res. between FET gates and chip

Jack

Sourced on digikey https://www.digikey.ca/en/products/detail/yageo/RC0603FR-070RL/1304008

Determine if FETs are justified, if not, find better ones

Jerry

• Selected new switching FETs

•  

Calculations for bootstrap supply

Jerry

• Done, minimum Cboot is 0.02 uF

Add DNP pads for components that aren’t in the current schematic but are shown in places in the datasheet (reference screenshot from Daniel)

Jerry

• Done

TVS diode for overcurrent protection boards

Stanley

• Done, went with diode similar to recommended in terms of specs, but uses package with existing warg footprint

AAM justification

Stanley

• Added justification to project page