Microchip Technology DM183021 Manuel D’Utilisation
PICDEM™ MC LV Development Board
DS51554B-page 14
© 2006 Microchip Technology Inc.
2.5
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.
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
Connecting an Alternate Power Supply
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.
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.
CAUTION
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.
jumper J3 is removed. Failure to do this may cause the board to fail or the power
supply to fail.