UCD3138ARMHT datasheet(53/83 Pages) TI

53 / 83 page

UCD3138A

www.ti.com

SLUSC66B – MARCH 2015 – REVISED MAY 2015

Application, Implementation, and Layout

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

7.1

Application Information

The UCD3138A has an extensive set of fully-programmable, high-performance peripherals that make it

suitable for a wide range of power supply applications. In order to make the part easier to use, TI has

prepared an extensive set of materials to demonstrate the features of the device for several key

applications. In each case the following items are available:

1. Full featured EVM hardware that demonstrates classic power supply functionality.

2. An EVM user guide that contains schematics, bill-of-materials, layout guidance and test data

showcasing the performance and features of the device and the hardware.

3. A firmware programmers manual that provides a step-by-step walk through of the code.

Table 7-1. Application Information

APPLICATION

EVM DESCRIPTION

This EVM demonstrates a PSFB DC-DC power converter with digital control using the UCD3138A device. Control is

implemented by using PCMC with slope compensation. This simplifies the hardware design by eliminating the need

for a series blocking capacitors and providing the inherent input voltage feed-forward that comes from PCMC. The

Phase shifted full

controller is located on a daughter card and requires firmware in order to operate. This firmware, along with the entire

bridge

source code, is made available through TI. A free, custom function GUI is available to help the user experiment with

the different hardware and software enabled features. The EVM accepts a DC input from 350 VDC to 400 VDC, and

outputs a nominal 12 VDC with full load output power of 360 W, or full output current of 30 A.

This EVM demonstrates an LLC resonant half-bridge DC-DC power converter with digital control using the

UCD3138A device. The controller is located on a daughter card and requires firmware in order to operate. This

LLC resonant

firmware, along with the entire source code, is made available through TI. A free, custom function GUI is available to

converter

help the user experiment with the different hardware and software enabled features. The EVM accepts a DC input

from 350 VDC to 400 VDC, and outputs a nominal 12 VDC with full load output power of 340 W, or full output current

of 29 A.

Application, Implementation, and Layout

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