DM183021 Microchip Technology, DM183021 Datasheet - Page 18

• Manufacturer Part Number: DM183021
• Description: BOARD DEV PICDEM MC LV
• Manufacturer: Microchip Technology
• Series: PICDEM™r

Specifications of DM183021

• Main Purpose: Power Management, Motor Control
• Embedded: No
• Utilized Ic / Part: PIC18F, dsPIC30F
• Primary Attributes: Brushless DC (BLDC) Motors, 3-Phase, 1A, LIN, SPI, PWM Interface
• Secondary Attributes: Graphical User Interface
• Silicon Manufacturer: Microchip
• Silicon Core Number: PIC18F2431, DsPIC30F3010
• Core Architecture: PIC
• Core Sub-architecture: PIC18F, PIC30F
• Silicon Family Name: Piccolo
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PICDEM™ MC LV Development Board
2.5
DS51554B-page 14
POWER SUPPLY
A 24V DC block power supply connected to J20 serves as the main power supply to
the board. A +15V power supply is generated for the gate drivers using a 15V regulator
(VR2). This 15V regulator is passed through a 5V regulator to drive a +5V power supply
to the MCU and the control circuit around the MCU.
2.5.1
The board can support the motors up to the rated voltage of 48V. However, the input
power supply that can be connected on J20 is limited to 24V. In such cases, a provision
is made to connect a different power supply that powers the DC bus using ‘+’ and ‘–’
terminals on J9. The power jumper J3 that is next to the connector J9 should be opened
when a second power supply is connected to J9. This arrangement can also be used
if the motor has a lower rated voltage, for example, 12V.
When using a second power supply on ‘+’ and ‘–’ terminals on J9, make sure that
jumper J3 is removed. Failure to do this may cause the board to fail or the power
supply to fail.
Connecting an Alternate Power Supply
CAUTION
© 2006 Microchip Technology Inc.