Description
2
Description
UCD3138A64CEVM-660 is an EVM board, functioning as a control card for UCD3138A64PFC digital
power supply applications. This EVM is used to control a power converter topology such as LLC Resonant
Half-Bridge DC converter, and Phase-Shifted Full-Bridge DC converter, and so forth, by downloading the
associated firmware and interfacing with an appropriate power stage board. When coupled with the
appropriate corresponding firmware, the EVM works seamlessly with the following EVM boards:
•
UCD3138PSFBEVM-027,
A Digital Controlled Phase-Shifted Full-Bridge DC-to-DC Converter
•
UCD3138LLCEVM-028,
A Digital Controlled LLC Half-Bridge DC-to-DC Converter Evaluation board
Contact Texas Instruments for assistance with obtaining the firmware source code used to interface the
UCD3138A64 with these EVMs.
2.1
Typical Applications
•
Off-line isolated power supply applications such as, LLC resonant half-bridge dc-dc power converter,
and phase-shifted full-bridge dc-dc power converter
•
Server systems
•
Telecommunication systems
2.2
Features
•
40-pin digital signal connector to connect digital signals to power converters
•
40-pin analog signal connector to connect analog signals to power converters
•
2-Mbit SPI and I2C accessible EEPROMs for additional, onboard memory storage capacity
•
JTAG connector
•
LED indicator
•
PMBus connector to PC computer connection through USB-to-GPIO adapter
•
Rich test points to facilitate the IC evaluation, system design and circuit and firmware debugging
2.3
Configuring the EVM to Access EEPROM SPI or I
2
C Communication with
UCD3138A64
The UCD3138A64CEVM-660 contains all the features of the UCD3138CC64EVM-030. However, the
UCD3138A64CEVM-660 adds two programmable EEPROM devices for use with the UCD3138A64
device – one accessed via SPI communication port and the other via the 2
nd
I
2
C port in UCD3138A64.
Additionally, unlike the UCD3138064EVM-166, both EEPROMs can be accessed by the device
simultaneously, since both SPI and I
2
C hardware have been assigned dedicated pins. Appropriate
firmware is necessary to configure the UCD3138A64 device to choose the communication port desired.
No hardware changes are required to interface with either the SPI or I
2
C EEPROMs.
•
To choose I
2
C EEPROM, connect jumpers J9 and J10, each in position 1 (Pins 1 and 2). Also, make
sure J7 and J8 are disconnected.
•
To choose SPI EEPROM, connect jumpers J7 and J8 as well as jumpers J9 and J10, each in position
2 (Pins 2 and 3).
3
SLUUB53 – July 2014
Control Card in Digitally Controlled Off-Line Isolated Power Converters
Copyright © 2014, Texas Instruments Incorporated
