FaSTTUBe/scruti-documents
61
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

small changes (SDC)

Browse Source
This commit is contained in:
Johnny Hsu 2025-05-05 20:01:24 +02:00
parent 25672d3c94
commit 98d20a9e56
2 changed files with 12 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
SDC-schematic/SDC-schematic.pdf
View File

Binary file not shown.

21
SDC-schematic/SDC-schematic.tex
View File

@ -33,22 +33,24 @@
\section*{AMS \& IMD latching}
See: \hyperlink{./Documents/Master_FT25.pdf.8}{AMS Master - SDC Schematic} \\
Latching is achieved using the MC14013BDG flip-flop\cite{flipflop_datasheet}.
The \texttt{SET} inputs of the flip-flops are pulled high by default, opening the SDC.
The signals \texttt{AMS\_OK} and \texttt{IMD\_OK} pull the \texttt{SET} input low.
The \texttt{RESET} input is the only way to reset the flip-flop state and close the SDC.
Latching is achieved using the MC14013BDG flip-flop. \cite{flipflop_datasheet}
The \texttt{SET} inputs of the flip-flops are pulled high by default, opening the SDC.
The signals \texttt{AMS\_OK} and \texttt{IMD\_OK} pull the \texttt{SET} input low.
The \texttt{RESET} input is the only way to reset the flip-flop state and close the SDC.
\\
This signal is driven high in two cases:
This signal is driven high in two cases:
\begin{itemize}{}
\item when the reset button on the side panel is pressed,
\item when the Power-on-Reset is active (which occurs only once, when the AMS Master receives LV supply for the first time).
\item when the reset button on the side panel is pressed,
\item when the Power-on-Reset is active (which occurs only once, when the AMS Master receives LV supply for the first time).
\end{itemize}
Which mean if SDC is opened by the AMS Master because of an error, the only way to close it is by pressing the reset button or by powercycling the car.
Which mean if SDC is opened by the AMS Master because of an error, the only way to close it is by pressing the reset button or by powercycling the LVS.
\section*{Current Consumption}
See: \hyperlink{./Documents/SDC.pdf.1}{SDC Schematic} \\
To calculate the current consumption, the load on the shutdown circuit must first be identified. As seen in the SDC schematic, the load consists of the AIRs, precharge relay, EBS Relay and the Discharge Circuit.
To calculate the current consumption, the load on the shutdown circuit must first be identified. As seen in the SDC schematic, the load consists of the AIRs, Precharge Relay, EBS Relay and the Discharge Circuit.
The current consumption of the components are as follows:
\begin{multicols}{2}
@ -64,6 +66,7 @@ We can then find the total consumption when we add all the the load together. $\
\section*{Overcurrent Protection}
See: \hyperlink{./Documents/FT25_PDU-powerstages-SDC (9A).pdf.1}{PDU - SDC} \\
The overcurrent protection is achieved with a physical fuse and a power switch on our Power Distribution Unit PCB.
The fuse holder is the 3557-15\cite{fuseholder_datasheet}, which holds our 1A fuse, and the powerswitch is the BTT6050-1ERA\cite{profet_datasheet} from Infineon.