EPC9118: 5V @ 20A, 30 ~ 60 Vin, Buck


The EPC9118 demonstration board is a 5 V output, 400 kHz buck converter with a 20 A maximum output current [25A with convection cooling] and 30 V to 60 V input voltage range (48 V nominal).

The demonstration board features the EPC2001/EPC2021 enhancement mode (eGaN®) field effect transistors (FETs), as well as the LTC3891 Buck controller intended for use with MOSFETs.The EPC9118 board contains the complete power stage (including eGaN FETs, driver, inductor andinput/output caps) in a compact 1" x 1.3" layout to showcase the performance that can be achieved using the eGaN FETs and a traditional MOSFET controller together.

The EPC9118 demonstration board is 2 ½" square and contains a fully closed-loop buck converter with optimized control loop.

There are also various probe points to facilitate efficiency calculation. A complete block diagram of the circuit is given in Figure 1. For more information on the EPC2001/EPC2021 eGaN FETs orLTC3891 controller, please refer to the datasheet which should be read in conjunction with this quick start guide.


Manufacturer EPC
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 917-1073-ND
Eval Board Supplier EPC
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 5 V
Current Out 20 A
Voltage In 30 ~ 60 V
Efficiency @ Conditions >92%, 36V in, 5V @ 3 ~ 25 A
>91%, 48V in, 5V @ 5 ~ 25 A
>90%, 56V in, 5V @ 6 ~ 25 A
Voltage Out Range - Fixed
Features Current Limit (Adj. or Fixed)
LDO Regulator(s), On-Chip
Over Voltage Protection
Power Good Output
Shutdown, Enable, Standby
Soft Start
Under Voltage Protection, Brown-Out
Voltage Tracking
Switching Frequency 400 kHz
Standby Current [Typical] 14 µA
Quiescent Current [Typical] 50 µA
Component Count + Extras 42 + 11
Internal Switch No
Design Author EPC
Application / Target Market Automotive
Portable Devices
Power: Auxiliary Power Supply
Standby Current [Maximum] 25 µA
Quiescent Current [Maximum] 75 µA
Main I.C. Base Part EPC2001
Date Created By Author 2014-10
Date Added To Library 2017-04

Eval Board

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