QUICK START GUIDE
EPC90148
EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2022 | | 2
DESCRIPTION
The EPC90148 is a half bridge development board with onboard gate
driver, featuring the 150 V rated EPC2308 eGaN® eld eect transistor
(FET). The purpose of this development board is to simplify the evaluation
process of the EPC2308 by including all the critical components on a
single board that can be easily integrated into most existing converter
topologies.
The EPC90148 development board measures 2” x 2” and contains two
EPC2308 eGaN FETs in a half bridge conguration. The EPC90148 features
the Onsemi NCP51820AMNTWG gate driver. The board contains all critical
components, and the layout supports optimal switching performance.
There are also various probe points to facilitate simple waveform
measurement and eciency calculation. A block diagram of the circuit
is given in gure 1.
For more information on EPC2308 please refer to the datasheet
available from EPC at www.epc-co.com. The datasheet should be read in
conjunction with this quick start guide.
Table 1: Performance Summary (T
A
= 25°C) EPC90148
Symbol Parameter Conditions Min Nominal Max Units
V
DD
Gate Drive Regulator
Supply Range
7.5 15
V
V
IN
Bus Input Voltage
Range
(1)
120
I
OUT
Switch Node Output
Current
(2)
30 A
V
PWM
PWM Logic Input
Voltage Threshold
(3)
Input ‘High’ 3.5 5.5
V
Input ‘Low’ 0 1.5
V
EN
Input ‘High’ 3.5 5.5
Input ‘Low’ 0 1.5
PWM ‘High’ State Input
Pulse Width
V
PWM
rise and fall
time < 10 ns
50
ns
PWM ‘Low’ State Input
Pulse Width
(4)
V
PWM
rise and fall
time < 10 ns
200
(1) Maximum input voltage depends on inductive loading, maximum switch node ringing
must be kept under 150 V for EPC2308.
(2) Maximum current depends on die temperature – actual maximum current is aected by
switching frequency, bus voltage and thermal cooling.
(3) When using the on-board logic buers, refer to the NCP51820AMNTWG datasheet
when bypassing the logic buers.
(4) Limited by time needed to ‘refresh’ high side bootstrap supply voltage.
EPC90148 development board
Back viewFront view
Figure 1: Functional block diagram overview of the EPC90148 board
V
DD
V
IN
Q
1
Q
2
C
Bypass
PWM1
EN
GND jumper
EN
Default
- Independent PWM
- No-X conduction protection
5 V
GND
C
out
Gate driver
Out
PGND
PWM2
L
1
Level
shift
LDO
LDO
Hin
Lin
DT
LDO
Level
shift
D
BTST
LDO
Logic
Gate drive
regulator
Logic and
dead-time
adjust
*
*