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dc2518af
DEMO MANUAL DC2518A
GLOSSARY OF TERMS
Figure 1. DC2518A Demo Setup
The following list contain terms used throughout the
document.
Channel
– The collection of functions that monitor, su-
pervise, and trim a given power supply rail.
EEPROM
– Nonvolatile memory (NVM) storage used to
retain data after power is removed.
Margin
– Term used typically in board level testing that
increases/decreases the output voltage to look for sensi-
tivity/marginality problems.
Monitor
– The act of measuring voltage, current, and
temperature readings.
NVM
– Nonvolatile memory, see EEPROM.
OV
– Overvoltage, the result of a voltage comparison that
a pin voltage is above a programmable threshold voltage.
PMBus
– An industry standard power management proto-
col with a fully defined command language that facilitates
communication with power converters and other devices
in a power system.
Rail
– The final output voltage that the LTC2975 supervises.
Supervise
– The act of quickly responding to a voltage
and current condition that is compared to pre-programmed
values.
Trim
– The act of adjusting the final output voltage. A servo
loop is typically used to trim the voltage.
UV
– Undervoltage, the result of a voltage comparison that
a pin voltage is below a programmable threshold voltage.
• Prototype your system by modifying: nominal output
voltages, range and resolution of margining, sequenc-
ing, OV/UV limits, and OC limits.
• Create your own configuration: store in the LTC2975
EEPROM or save to a project file. Order pre-programmed
parts.
• Test fault scenarios. Short outputs to ground, and
observe system response and faults.
WHAT THIS DEMO SYSTEM CAN DO
Demo System Hardware
Hardware Required:
1. DC2518A
2. PC + USB Cable
3. 12V, >1A Power Supply
4. USB to I
2
C/SMBus/PMBus Controller (DC1613)
dc2518a F01
USB to I
2
C/SMBus/
PMBus Controller
(DC1613)
LTC2975 PSM &
4-Ch HV/Neg Demo
Board (DC2518A)
+12V Power
Supply
USB
CH0: +12V
CH1: –12V
CH2: +48V
CH3: –48V
