H832PDVAA Board
H832PDVAA is a DC power board. It supplies one channel of -48 V DC
power to the backplane, or converts -48 V DC power to +3.3 V DC and
+12 V DC and then supplies power to service boards, control board,
and fan monitoring board using the backplane.
Functions and Specifications
For details, see Differences Between Power Boards.
Power Consumption of the H836VPBA Daughter Board
For details, see Board Power Consumption.
Working Principles
Figure 1shows working principles of the H832PDVAA board.
Figure 1Working principles of the H832PDVAA board
Basic working principles of the H832PDVAA board are as follows:
The protection and filter circuit protects the -48 V DC power input
against surges and lightning strikes for current limiting and also
filters EMI for the -48 V DC power input.
The soft-start circuit provides the soft-start function for the -48
V DC power input of the +12 V DC and +3.3 V DC power modules.
The output filter circuit filters the output of the +12 V DC and
+3.3 V DC power modules.
The detection and alarm circuit detects the availability of the -48
V DC power and reports related alarms.
The electronic label and board type reporting circuit stores the
board manufacturing information and reports the board type.
The H836VPBA daughter board implements the vectoring function for
calculating and canceling the crosstalk on narrowband lines.
Front Panel Port
