Microchip Technology AC164133 Data Sheet
Hardware Overview
© 2008 Microchip Technology Inc.
DS70336A-page 17
2.2.5
VOUT1 J4 (Buck1+)
An external load can be connected to VOUT1 through the J4 connector. One
on-board parallel resistor, R44 (5
on-board parallel resistor, R44 (5
Ω/5W), is connected at the output of VOUT1
through MOSFET Q13 to optionally load the Buck 1 converter circuit. Resistor R45 is
on-board, and there is space to solder resistor R46 onto the board. When resistor
R46 is connected to VOUT1, the J11 jumper must be open while working with +9V
power from the control board. The on-board load resistor can be connected to
VOUT1 by controlling the signal name “Load”. The “Load” signal is the I/O pin of the
SMPS dsPIC DSC device, and is active-high. See Figure A-2 for the location of this
connector.
on-board, and there is space to solder resistor R46 onto the board. When resistor
R46 is connected to VOUT1, the J11 jumper must be open while working with +9V
power from the control board. The on-board load resistor can be connected to
VOUT1 by controlling the signal name “Load”. The “Load” signal is the I/O pin of the
SMPS dsPIC DSC device, and is active-high. See Figure A-2 for the location of this
connector.
2.2.6
VOUT2 J5 (Buck2+)
An external load can be connected to VOUT2 through the J5 connector. VOUT2
can load up to a maximum of 3 amps when the auxiliary input voltage source is
connected at the J9 input connector. See Figure A-3 for the location of this connec-
tor.
can load up to a maximum of 3 amps when the auxiliary input voltage source is
connected at the J9 input connector. See Figure A-3 for the location of this connec-
tor.
2.2.7
VOUT3 J8 (Boost)
An external load can be connected to VOUT3 through the J8 connector. VOUT3 can
load up to 0.75 amps when the auxiliary input voltage source is connected at the J9
input connector. See Figure A-4 for the location of this connector.
load up to 0.75 amps when the auxiliary input voltage source is connected at the J9
input connector. See Figure A-4 for the location of this connector.
2.2.8
Jumpers
The Daughter Board consists of three jumpers that determine its features. Table 2-3
lists jumpers and their functions.
lists jumpers and their functions.
TABLE 2-3:
JUMPERS
2.2.9
Potentiometer and LED
The Daughter Board consists of a potentiometer and LEDs for the user application.
Table 2-4 lists components and their functions.
Table 2-4 lists components and their functions.
TABLE 2-4:
POTENTIOMETERS AND LED
Jumpers
Description
Default Configurations
J6
Select either 9V power provided by the Explorer 16 Develop-
ment Board or 16-bit 28-pin Starter Development Board, and
an external power supply
ment Board or 16-bit 28-pin Starter Development Board, and
an external power supply
Short with jumper header (closed)
J10
Connects potentiometer RP1 to AN10 on Explorer 16 Develop-
ment Board
ment Board
Open
J11
Connects R46 load resistor to VOUT1
Open
J12
Buck 2 voltage feedback selection
Short with jumper header (closed)
J13
Buck 2 current feedback selection
Short with jumper header (closed)
J14
Boost current feedback selection
Open
J15
Boost voltage feedback selection
Open
Label
Hardware Elements
RP1
Potentiometer connected to AN10 of Explorer 16 Development Board controller
D11
Buck 1 output LED
D12
Buck 2 output LED
D13
Boost output voltage LED
D14
Input voltage LED