Demoboard EPC9131

19 V Regulated SEPIC Using EPC2112

Topology: SEPIC
Input Voltage (min.): 14.00 V
Input Voltage (max.): 48.00 V
Output 1: 19.00 V / 1.420 A

Original publication on 2018-04-04, revision 1.0


The EPC9131 demonstration board is a 19 V output, 300 kHz single-ended primary-inductor converter (SEPIC) with a 27 W maximum output power and 14 V to 48 V input voltage range. The demonstration board features the EPC2112 enhancement mode (eGaN®) integrated circuit (IC), as well as the LM3481 controller intended for use with MOSFETs. The EPC9131 board contains the complete power stage (including eGaN IC, driver, inductors and input/output capacitors) in a compact 25 mm x 33 mm layout to showcase the performance that can be achieved using the eGaN IC. It also contains a closed-loop SEPIC with optimized control loop. The total board dimension is 48 mm x 50 mm.There are also various probe points to facilitate efficiency measurement. A complete power schematic block diagram of the circuit is given in figure 1.For more information on the EPC2112 eGaN IC or LM3481 controller, please refer to the datasheet available from EPC at www.epc-co.comand www.ti.com respectively. These datasheets should be read in conjunction with this quick start guide.


  Order Code SPEC Product series C
Tol. C VR
(V (DC))
Bauform Keramiktyp H
Technische Artikelnummer DF
885012005057 PDF WCAP-CSGP MLCCs 50 V(DC) 22 ±5% 50 0402 NP0 Class I 0.5 NP00402220J050DFCT10000
885012205037 PDF WCAP-CSGP MLCCs 16 V(DC) 100 ±10% 16 0402 X7R Class II 0.5 X7R0402104K016DFCT10000 5
885012205038 PDF WCAP-CSGP MLCCs 25 V(DC) 100 ±10% 25 0402 X7R Class II 0.5 X7R0402101K025DFCT10000 3.5