EPC 9115 Quick Start Manual

Demonstration Board
EPC9115
Quick Start Guide
1/8th Brick Converter
Featuring EPC2020 and EPC2021
For More Information:
Please contact info@epc-co.com
or your local sales representative
Visit our website:
www.epc-co.com
Sign-up to receive
EPC updates at
bit.ly/EPCupdates
or text "EPC" to 22828
EPC Products are distributed
through Digi-Key.
www.digikey.com
DESCRIPTION
The EPC9115 demonstration board is a fully regulated 300 kHz isolated DC/DC bus converter
with a 12 V, 42 A output and a input range of 48 – 60 V. The demonstration board features the
enhancement mode (eGaN®) field effect transistors (FETs), the EPC2020 (60 V) and EPC2021 (80 V),
along with eGaN FET specific integrated circuit drivers – the LM5113 half-bridge driver and
UCC27611 low side driver from Texas Instruments. The power stage is a conventional
hard-switched 300 kHz isolated buck converter. The EPC9115 board is intended to
showcase the superior performance that can be achieved using eGaN FETs and eGaN driver
together in a conventional topology.
The complete converter fits within a standard eighth-brick envelope, but the demonstration board
is oversized to allow connections for bench evaluation. There are also various probe points to
facilitate simple waveform measurement and efficiency calculation.
A complete block diagram of the circuit is given in Figure 1. The converter uses a full-bridge (FB)
primary power stage, a 4:1 transformer, and a center-tapped (CT) output stage with active reset
snubbers. Control is provided by a Microchip dsPIC® controller, and basic voltage mode control
is implemented. For more information on the EPC2020 and EPC2021 eGaN FETs, as well as the
gate drivers and controller, please refer to the datasheets available from EPC at www.epc-co.com,
www.ti.com, and www.microchip.com. These datasheets, should be read in conjunction with
this quick start guide.
Table 1: Performance Summary (V
SYMBOL PARAMETER
V Bus Input Voltage Range
IN
V Output Voltage
OUT
I Output Current
2
OUT
f Switching Frequency
SW
Output Ripple Frequency
Peak Efficiency
Full Load Efficiency
Full Load Efficiency
Full Load Efficiency
Output voltage duty cycle limited to 98%
1
Maximum current limited by thermal considerations
2
Board placed vertical on long edge to aid convection – Do NOT operate horizontally without forced air cooling
3
Demonstration Board Notification
EPC9115 boards are intended for product evaluation purposes only and are not intended for commercial use. As evaluation tools, they are not designed for compliance with the European Union directive on
electromagnetic compatibility or any other such directives or regulations. As board builds are at times subject to product availability, it is possible that boards may contain components or assembly materials
that are not RoHS compliant. Efficient Power Conversion Corporation (EPC) makes no guarantee that the purchased board is 100% RoHS compliant. No Licenses are implied or granted under any patent
right or other intellectual property whatsoever. EPC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual
property rights of any kind.
EPC reserves the right at any time, without notice, to change said circuitry and specifications.
EPC – EFFICIENT POWER CONVERSION CORPORATION |
=52 V, T = 25°C, 400 LFM unless otherwise specified)
IN A
CONDITIONS
T = 25°C, no forced air cooling
3
a
T = 25°C, ~200 LFM
a
T = 25°C, ~400 LFM
a
48 V , 30 A I
IN OUT
52 V , 42 A I
IN OUT
56 V , 42 A I
IN OUT
60 V , 42 A I
IN OUT
WWW.EPC-CO.COM
MIN TYP MAX UNITS
48 52 60 V
11.4 12 12.1 V
1
5 A
35 A
42 A
300 kHz
600 kHz
96.7 %
96.4 %
96.3 %
96.1 %
| COPYRIGHT 2015