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EPC9145 Motor Drive Board
EPC – POWER CONVERSION TECHNOLOGY LEADER | EPC-CO.COM | ©2022 | | 2
DESCRIPTION
The EPC9145 demonstration board is a 3-phase BLDC motor drive inverter board featuring the EPC2206 eGaN FET 2.2 mΩ maximum R
DS(on)
, 80 V
maximum device voltage, it can deliver up to 28 A
pk
(20 A
RMS
) maximum output current. The board can also be congured for multi-phase DC–DC
conversion and the EPC2206 supports PWM switching frequencies up to 250kHz. The EPC9145 contains all the necessary critical functions circuits to
support a complete motor drive inverter including gate drivers, regulated auxiliary power rails for housekeeping supplies, voltage, and temperature
sense, accurate current sense, and protection functions. The various functional blocks are shown in gure 1. The EPC9145 mates with an assortment
of compatible controllers, supported by various manufacturers leveraging existing resources for quick development purposes, that can quickly be
congured as a motor drive inverter or DC–DC converter.
Figure 1: Photo overview of the EPC9145 board highlighting the main sections
Figure 2. Block diagram of EPC9145 board in BLDC drive example application
Heatsink mounting (x4)
Motor
connection
Housekeeping
power supply
Overcurrent
protection
jumper
Control
connection
Current sensing
option setting
Main power
connection
EPC2206
and leg shunts
Hall/encoder
interface
Phase shunts
Gate drivers
Thermal sensors
Bottom side
Top side
Half
bridge
gate
driver
Jsns1
3V3
5 V
Va
Vin
Vb
Vc
Ia
Ib
Ic
OCPn
Inverter Board
BLDC
motor
To/From
controller
interface
board
GND
Voltage
sense
Current sense
ampliers
V
IN
up
to 80 V
Vin
Va
Half
bridge
gate
driver
Jsns1
Vb
Half
bridge
gate
driver
Over
Current
Protection
Jsns1
JOCPn
Vc
HV PSU
A functional block diagram of the EPC9145 demonstration board is shown in gure 2 that details the phase current sense, phase and DC voltage sense,
the half-bridge power stages, L-C lter, housekeeping power supply and controller interface connection.