11
EasyPIC6 Development System
MikroElektronika
page
5.0. Power Supply
The EasyPIC6 development system may use one of two power supply sources:
1
. +5V PC power supply through the USB programming cable;
2
. External power supply connected to a DC connector provided on the development board.
The MC34063A voltage regulator is used for enabling external power supply voltage to be either AC (in the range of 7V to 23V) or DC
(in the range of 9V to 32V). Jumper J6 is used as power supply selector. When using USB power supply, jumper J6 should be placed in
the USB position. When using external power supply, jumper J6 should be placed in the EXT position. The development system is turned
OFF/ON by changing the setting on the OFF/ON switch respectively.
CN16
AC/DC
R55
3K
R57
0.22
R56
1K
E2
J6
10uF
E3
330uF
E1
U10
D12
4x1N4007
D13
D14
D15
330uF
OFF
ON
C8
220pF
VCC-5V
VCC-USB
MC34063A
L2
220uH
D7
MBRS140T3
R14
2K2
LD42
POWER
VCC
VCC-MCU
MOSFET
switch
on-board
programmer
SWC
SWE
CT
GND
DRVC
IPK
Vin
CMPR
Side view
Top view
221
Bottom view
Side view
330
35A
8N6
Side view
Side view
A
K
106
10V
Side view
A
K
Side view
+
106
10V
Side view
MC
34063A
Figure 5-2
: Power supply source schematic
AC/DC connector
USB connector power supply
Power supply voltage regulator
DC connector (
2
)
Jumper J6 used for
selecting power supply
OFF/ON switch
USB connector (
1
)
Figure 5-1
: Power supply
The programmer uses the MOSFET switch for suspending power supply on the development system during programming. When the
process of programming is complete, the programmer enables the development system to be supplied with power.
SMD MOSFET
IRFR9024N
