Setting Files And Eeprom - Analog Devices ADP1046A User Manual

ADP1046A 100Watt
Evaluation board

SETTING FILES AND EEPROM

The ADP1046A communicates with the GUI software using the I2C bus.
The register settings (having extension .46r) and the board settings (having extension .46b) are two files that are associated
with the ADP1046A software. The register settings file contains information that govern the functionality of the part such as the
over voltage and over current limits, softstart timing, PWM settings, etc. The ADP1046A stores all its settings in the EEPROM.
When the ADP1046A is connected to the USB dongle, the LDO powers the IC and the GUI downloads the settings from the
registers of the ADP1046A. It is possible to save these settings in a file for later use through the GUI. Older register settings
are overwritten when new files are loaded.
Information about the board, such as current sense resistor, output inductor and capacitor values is stored in the board setup
file (extension .46b) and can be stored to Page 2 of the EEPROM. This information is necessary for the GUI to display the
correct information in the 'Monitor' tab as well as 'Filter Settings' window. The ADP1046A does not need this information in
order to operate, but the GUI will need it in order to show the values correctly in the 'Flags and Settings' window. The entire
status of the power supply such as the OrFET and synchronous rectifiers enable/disable, primary current, output voltage and
current can be digitally monitored and controlled through software. Always make sure that the correct board file has been
loaded for the board currently in use.
Each ADP1046A chip has trim registers for temperature, input current and output voltage and current. These can be
configured during production and are not overwritten whenever a new register settings file is loaded. This is done in order to
retain the trimming of all the ADCs for the corresponding environmental and circuit conditions (component tolerances, thermal
drift, etc.). A guided wizard called 'Auto Trim' is started which trims the above mentioned quantities so that the measurement
value matches the value displayed in the GUI.
In the following pages it will be shown that the ADP1046A can be easily programmed to modify the behavior of the PSU under
different fault and load conditions without any hardware changes. All the changes are purely through software and do not
require desoldering components and replacing them with new values to specify a different operating condition
Figure 3 - ADP1046A and GUI interaction
Rev. 1.3 | Page 6 of 55
PRD1386