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C
Conv TTL Blocking
Commit ee4ef3a3 authored by gilsoriano's avatar gilsoriano
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Issue report completed. Corrected filenames.

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pcb/doc/issues/conv-ttl-blo/m25p32.tex → pcb/doc/issues/conv-ttl-blo/02446_issues.tex
View file @ ee4ef3a3
......@@ -248,11 +248,11 @@ the 24 volts power supply rail.\\
\hline
\textbf{Capacitor} & \textbf{Value} \\
\hline
C192 & removed\\
C192 & Not mounted \\
\hline
C193 & removed\\
C193 & Not mounted \\
\hline
C189 & removed\\
C189 & Not mounted \\
\hline
\end{tabular}
\end{center}
......@@ -404,9 +404,186 @@ interrupt acknowledge lines.
\end{tabular}
\end{center}
In addition, power supply must be changed. It is explained in the next section.
\pagebreak
\section{Blocking module}
\section{Blocking module changes}
\begin{table}[!htb]
\begin{center}
\newcolumntype{R}{>{\raggedleft\arraybackslash}X}%
\begin{tabularx}{13cm}{|l|R|}
\hline
\textbf{OHWR issue 462} & \url{http://www.ohwr.org/issues/462}\\
\hline
\hline
\multicolumn{2}{|l|}{
\begin{minipage}[t]{0.95\columnwidth}%
The blocking modules must face some profiling. The
changes address three points:
\begin{itemize}
\item Being less temperature resistance.
\item Improve operating point of the MOSFET (be fully conducting).
\item Improve RC constant after pulse is outputed.
\end{itemize}
\vspace{0.125cm}
\end{minipage}}\tabularnewline
\hline
\end{tabularx}
\caption{Issue 462: Blocking module changes}
\end{center}
\end{table}
\subsection{Eliminate temperature issues}
Due to kT relationship, the gate diode must be removed.
\textbf{CHANGES OF COMPONENTS}\\
\begin{center}
\begin{tabular}{|c|c|}
\hline
\textbf{Diode} & \textbf{Value} \\
\hline
\hline
D69 & Remove \\
\hline
D45 & Remove \\
\hline
D21 & Remove \\
\hline
D65 & Remove \\
\hline
D41 & Remove \\
\hline
D17 & Remove \\
\hline
D61 & Remove \\
\hline
D37 & Remove \\
\hline
D13 & Remove \\
\hline
D67 & Remove \\
\hline
D43 & Remove \\
\hline
D19 & Remove \\
\hline
D63 & Remove \\
\hline
D39 & Remove \\
\hline
D15 & Remove \\
\hline
D59 & Remove \\
\hline
D35 & Remove \\
\hline
D11 & Remove \\
\hline
\end{tabular}
\end{center}
\subsection{Increase power supply of driver stage}
Driver stage must be powered at recommended 5 volts. It permits MOSFETs to be
fully conducting.
The change affects to all BCT25244 (IC2 and IC3).\\
\textbf{CHANGES OF CONNECTIONS}\\
\begin{center}
\begin{tabular}{|c|c|}
\hline
\multicolumn{2}{|c|}{\textbf{BCT25244}}\\
\hline
\hline
\textbf{IC} & \textbf{Value} \\
\hline
IC1 & Power pin to 5V\\
\hline
IC2 & Power pin to 5V\\
\hline
IC3 & Power pin to 5V\\
\hline
\end{tabular}
\end{center}
\subsection{Output resistors: change and add}
To better balancing the deal between fast draining and steady on-current, the
100R output resistors must be changed to 1K.\\
\textbf{CHANGES OF COMPONENTS}\\
\begin{center}
\begin{tabular}{|c|c|}
\hline
\textbf{Resistor} & \textbf{Value} \\
\hline
\hline
R196 & 100R change to 1K\\
\hline
R152 & 100R change to 1K\\
\hline
R118 & 100R change to 1K\\
\hline
R192 & 100R change to 1K\\
\hline
R148 & 100R change to 1K\\
\hline
R114 & 100R change to 1K\\
\hline
R188 & 100R change to 1K\\
\hline
R144 & 100R change to 1K\\
\hline
R110 & 100R change to 1K\\
\hline
R194 & 100R change to 1K\\
\hline
R150 & 100R change to 1K\\
\hline
R116 & 100R change to 1K\\
\hline
R190 & 100R change to 1K\\
\hline
R146 & 100R change to 1K\\
\hline
R112 & 100R change to 1K\\
\hline
R186 & 100R change to 1K\\
\hline
R142 & 100R change to 1K\\
\hline
R108 & 100R change to 1K\\
\hline
\end{tabular}
\end{center}
In addition, an external 1K after the protection diode must be added to
place a small load at the output when no external load is connected.
\textbf{CHANGES OF COMPONENTS}\\
\begin{center}
\begin{tabular}{|c|c|}
\hline
\textbf{Resistor} & \textbf{Value} \\
\hline
\hline
R[x] & Add 1K after the output protection diode \\
\hline
\end{tabular}
\end{center}
\section{Square LED array}
\begin{table}[!htb]
......
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