MCP39F521 Power Monitor Demonstration Board User’s Guide
DS50002413A-page 18
2015 Microchip Technology Inc.
3.2
POWER SUPPLY CIRCUIT
The power supply circuit for the MCP39F521 Power Monitor Demonstration Board is
shown in
.
FIGURE 3-4:
Power Supply Circuit with Option for AC/DC Switching Supply from Mains or DC Supply.
150 FB 470
4.7 µF
1
3
2
0.1 µF
+3.3 VD
+
10 µF
IN
OUT
GND
MCP1754
0.1 µF
A
GND
GNDB
GNDB
GNDB
GNDB GNDB
NT
‘
0.1 µF 10 µF
A
GND
A
GND
+3.3 VA
33
+
GNDB
4.7 µF
BP
FB
D
S
S
S
S
0.1 µF
GNDB
GNDB
100 µF
GNDB
470
150 FB
DC SUPPLY
AC/DC SUPPLY
AC/DC SUPPLY
JP2
8LNK304
8.2 K
2.05 K
4.7 µF
2.05 k
L
N
GNDB
10
µF
+
