Microchip Technology AC164133 Hoja De Datos
Hardware Overview
© 2008 Microchip Technology Inc.
DS70336A-page 21
FIGURE 2-5:
DAUGHTER BOARD HARDWARE CONNECTED TO A 16-BIT 28-PIN STARTER
DEVELOPMENT BOARD
DEVELOPMENT BOARD
2.4.1
16-bit 28-pin Starter Development Board Controls Buck 1 and
Buck 2 Stages (Default Jumper Configuration)
Buck 2 Stages (Default Jumper Configuration)
The dsPIC33FJ16GS502 SMPS device controls buck stages Buck 1 and Buck 2
through the 16-bit 28-pin Starter Development Board as the default configuration on the
Daughter Board, refer to Table 2-3. The two buck stages can be controlled as
multi-phase or as two parallel converters by shorting the VOUT1 (Buck1+) and VOUT2
(Buck2+) output, and by programming the output of buck stages to the same output
voltage value.
through the 16-bit 28-pin Starter Development Board as the default configuration on the
Daughter Board, refer to Table 2-3. The two buck stages can be controlled as
multi-phase or as two parallel converters by shorting the VOUT1 (Buck1+) and VOUT2
(Buck2+) output, and by programming the output of buck stages to the same output
voltage value.
2.4.2
16-bit 28-pin Starter Development Board Controls Buck 1 and
Boost Stages
Boost Stages
This section describes the hardware changes that must be performed to control the
Buck 1 and Boost stages. Figure 2-6 displays the feedback jumper, which must be
modified in the Daughter Board. See Figure A-4 for the complete Daughter Board
schematics.
Buck 1 and Boost stages. Figure 2-6 displays the feedback jumper, which must be
modified in the Daughter Board. See Figure A-4 for the complete Daughter Board
schematics.
MPLAB
®
ICD 2
MPLAB ICD 2
16-bit 28-pin Starter Development Board
+9V Power Supply Connector
Buck/Boost Converter PICtail™ Plus Daughter Board
Connector
Note 1:
To operate the two buck converters using the 16-bit 28-pin Starter Devel-
opment Board, ensure that J12, J13 and J6 are shorted with the jumper
header, and J14 and J15 are open before powering up the board.
opment Board, ensure that J12, J13 and J6 are shorted with the jumper
header, and J14 and J15 are open before powering up the board.
2:
The software file Buck1 Voltage Mode with 28P Starter Board
on the Buck/Boost Converter PICtail Plus Daughter Board CD only
provides control for the Buck 1 stage.
on the Buck/Boost Converter PICtail Plus Daughter Board CD only
provides control for the Buck 1 stage.