6
ASC Breakout Board
Figure 3. ASC Block Diagram
Voltage Monitoring
There are 10 VMON inputs to the analog section of the device (including the HIMONN_HVMON pin). These are
routed to slide potentiometers, board power supplies (not populated), and the on-board Hot Swap circuits (not pop-
ulated).
Most of the voltage monitors on the breakout board have low value series resistors connected between the on-
board components and the voltage monitors. These series resistors are populated so that the on-board voltage
monitor test points can be driven by an off-board source without damaging the on-board components. These series
resistors are not required for a real-world application board.
All voltages can be read out from the A/D converter using I
2
C. The VMON signal connections and board compo-
nents are described in Table 1. The schematic sheet location for the given components and signals are also listed
(see the
Appendix A. Schematics
section).
Table 1. Voltage Monitor Components and Signals
Component / Signals
Ref. Des.
Schematic
Sheet
Description
Components Populated on Breakout Board
Slider Potentiometers
(POT1 and POT2)
R50, R52
5
1 k
Ω
slider pot: provides a variable Voltage from zero
to 3.3 V. Connected to VMON7 and VMON8 of U1
with a 1k series resistor.
Series Resistors
R51, R53
5
1 k
Ω
resistor allows the user to safely drive VMON7
and VMON8 test points with an off-board Voltage
source.
Series Resistors
R5
1
, R6
1
2
270
Ω
resistor allows the user to safely drive VMON5
and VMON6 test points with an off-board Voltage
source.
O
u
tp
u
t Control
Block
ASC
Interface
(ASC-I/F)
N
on -
V
olatile
Fa
u
lt Log
Trim & Margin
Control
ADC
ADC
MOSFET &
Digital I/O Dri
v
e
C
u
rrent
Sense
V
oltage
Sense
T
emper
a
t
u
re
Sense
I
2
C
Interface
ADC
ADC
