Datasheet

Hardware Overview

2.2.5 VOUT1 J4 (Buck1+)

An external load can be connected to VOUT1 through the J4 connector. One

on-board parallel resistor, R44 (5Ω/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.

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.

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.

2.2.8 Jumpers

The Daughter Board consists of three jumpers that determine its features. Table 2-3

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: 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

Short with jumper header (closed)

J10 Connects potentiometer RP1 to AN10 on Explorer 16 Develop-

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