User's Guide
SLUU885B–March 2012–Revised July 2012
Digitally Controlled Single-Phase PFC Pre-Regulator
1 Introduction
This EVM is to help evaluate the UCD3138 64-pin digital control device in off-line power converter
application and then to aid its design. The EVM is a standalone Power Factor Correction (PFC) pre-
regulator of single-phase AC input. The EVM UCD3138PFCEVM-026 is used together with its control
card, UCD3138CC64EVM-030, also an EVM on which is placed UCD3138RGC.
The EVM of UCD3138PFCEVM-026 together with UCD3138CC64EVM-030 can be used as they are
delivered without additional work, from either hardware or firmware, to evaluate PFC. The
UCD3138PFCEVM-026 together with the UCD3138CC64EVM-030 can also be re-tuned on its design
parameters through the operation of GUI, called Texas Instruments Fusion Digital Power Designer, or re-
loaded up with custom firmware with user’s definition and development.
The EVM system is in topology of single-phase boost converter at its delivery on both hardware and
firmware, but can be re-configured into two other PFC topologies: dual-phase interleaved, and bridgeless,
then corresponding operation can be made by reloading with that associated firmware. All necessity of
hardware and firmware for the two additional topologies are already developed and delivered with the
shipment. Please contact Texas Instruments to obtain the instructions how to make re-configuration.
In the package delivered, three EVMs are included UCD3138PFCEVM-026, UCD3138CC64EVM-030, and
USB-TO-GPIO. In the same package, also included is a hard copy of Evaluation Module Electrical Safety
Guideline.
This user’s guide provides basic evaluation instruction from a viewpoint of system operation in standalone
PFC in its boost configuration.
3
SLUU885B–March 2012–Revised July 2012 Digitally Controlled Single-Phase PFC Pre-Regulator
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Copyright © 2012, Texas Instruments Incorporated
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