User's Guide
SLUUA80–January 2013
Using the UCD3138OL40EVM-032
1 Introduction
UCD3138OL40CEVM-032 EVM offers an easy to use test platform for stand-alone evaluation of Texas
Instruments’ UCD3138 highly integrated digital controller that is optimized for isolated power applications.
Featuring a 40-pin socket and comprehensive set of test points, the EVM allows hardware and firmware
engineers to manipulate signals on the different pins of the device individually and study open loop
operation. The EVM also offers the flexibility to realize simple closed loop control configurations (eg. using
RC circuits to filter PWM output signals and regulate a DC voltage in closed loop control). Hardware ports
available to communicate with the device include PMBus, UART and JTAG. The EVM accepts up to 5-V
DC input and an on-board 3.3-V LDO can be used to bias the device. Alternately, using jumpers, the
device can be biased using the PMBus communication pins.
NOTE: In order to download firmware and program the UCD3138 device in UCD3138OL40EVM-
032, a separate EVM from Texas Instruments known as the USB-TO-GPIO Adapter is
required. The USB-TO-GPIO Adapter is NOT supplied with UCD3138OL40EVM-032 and
must be purchased separately. The USB-TO-GPIO Adapter serves as a communication
interface adaptor or a bridge between a host PC and the UCD3138 via a standard type-A to
mini-B USB cable. The USB-TO-GPIO Adapter is listed below in the related products
section.
2 Description
The UCD3138OL40EVM-032 is an EVM board used to facilitate the evaluation on the UCD3138RHA
digital power controller. This EVM provides hardware needed to evaluate UCD3138 40-pin device. All pins
of UCD3138RHA are accessible through header connections, including all GPIO pins, ADC12 pins, front
end pins, DPWM pins, and Fault pins, etc. Particularly, the board has terminal of PMBus, UART DB-9
RS232, and JTAG. All headers can be jumped to configure for a particular interested evaluation need.
2.1 Typical Applications
• UCD3138RHA Function Evaluation
• Firmware Debug
• Hardware Design Assistance
2.2 Features
• Drop-In Socket to Flexible Change the Device
• External 5.0-V Supply or PMBus Bias Supply
• JTAG Connector
• UART Connector, DB-9, RS232
• LED Indicators
• PMBus Connector to PC Computer Connection Through USB-to-GPIO Adapter
• Rich Test Points to Facilitate the Device's Evaluation, System Design and Circuit and Firmware
Debugging
• Board with Jumpers (to make flexible configuration to adapt various evaluation target)
2Using the UCD3138OL40EVM-032 SLUUA80–January 2013
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