User's Guide
SLUUB82 – March 2015
Using the UCD3138ACCEVM149
1
Introduction
This UCD3138ACCEVM149 evaluation module is to help evaluate the UCD3138A digital controller device
from Texas Instruments and aid in design of digitally controlled isolated power converters. The UCD3138A
device belongs to the UCD3138 family of highly integrated digital controller devices optimized for isolated
power supply applications.
The UCD3138ACCEVM149 is quite similar to the UCD3138CC64EVM-030. The UCD3138ACCEVM149 is
to be used either as a stand-alone control card to study the UCD3138A controller device or as a DPWM
controller board working with a power stage board to implement a fully regulated power converter. To help
the targeted off-line isolated power applications, this EVM has been designed to work seamlessly with
power converter EVM offered by TI: UCD3138ALLCEVM-150. Please contact Texas Instruments for
assistance with firmware needed to configure the UCD3138A device and successfully interface
UCD3138ACCEVM149 with the above mentioned power converter EVM.
Alternately the EVM can also be loaded with user’s custom developed firmware. In order to communicate
with the UCD3138A digital controller in this EVM, a separate USB Interface Adapter EVM from Texas
Instruments known as the “USB-TO-GPIO Adapter” is required. The USB-TO-GPIO adapter is NOT
supplied with UCD3138ACCEVM149 evaluation module and must be purchased separately. Texas
Instruments also offers a Graphical User Interface in order to program the UCD3138A controller and
configure parameters when used with the power converter EVM mentioned above.
2
Description
The UCD3138ACCEVM149 is an EVM board, functioning as a control card for UCD3138ARGC digital
power supply applications. This EVM is used to control a power converter topology such as LLC Resonant
Half-Bridge DC converter, etc., by downloading the associated firmware and interfacing with an
appropriate power stage board. The EVM works seamlessly with the following EVM board, together with
corresponding firmware, all developed by Texas Instruments.
•
UCD3138ALLCEVM-150, a digital controlled LLC half-bridge DC-to-DC converter evaluation board
Contact Texas Instruments for assistance with firmware needed to configure the UCD3138A device and
successfully interface UCD3138ACCEVM149 with above mentioned power converter EVM.
2.1
Typical Applications
•
Off-line Isolated Power Supply Applications (such as, LLC resonant half-bridge DC-to-DC power
converter, and phase-shifted full-bridge DC-to-DC power converter)
•
Server Systems
•
Telecommunication Systems
2.2
Features
•
40-Pin Digital Signal Connector (to connect digital signals to power converters)
•
JTAG Connector
•
LED Indicator
•
PMBus Connector to PC Computer Connection through USB-to-GPIO Adapter
•
Rich Test Points to Facilitate the Device Evaluation (system design and circuit and firmware
debugging)
•
12-V Input Capable With Onboard Regulator 3.3 V
2
Using the UCD3138ACCEVM149
SLUUB82 – March 2015
Copyright © 2015, Texas Instruments Incorporated
