DM330023 Microchip Technology, DM330023 Datasheet - Page 45

• Manufacturer Part Number: DM330023
• Description: BOARD DEV DSPICDEM MCHV
• Manufacturer: Microchip Technology
• Series: dsPICDEM™r

Specifications of DM330023

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, Other
• Utilized Ic / Part: dsPIC33F
• Primary Attributes: AC Induction (ACIM) Motors, Brushless DC (BLDC) Motors, Permanent Magnet Synchronous (PMSM) Motors
• Secondary Attributes: Power Factor Corrected (PFC)
• Processor To Be Evaluated: dsPICDEM
• Processor Series: dsPIC DSC
• Interface Type: RS-232, USB
• Operating Supply Voltage: 90 V to 265 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

 2009 Microchip Technology Inc.
4.2.5
In addition to the fault signal generated by the power module, the system can also
create a DC bus overcurrent fault.
DC Bus Overcurrent, this fault signal is generated when the maximum current limit of
15A is reached. The comparison of the threshold value and the actual current is done
by comparator U14. The threshold limit is set by R42 and R47. R69 is a shunt jumper
resistor that can disconnect the overcurrent fault from the dsPIC DSC.
4.2.6
The power supply used by the push buttons, communication ports, and the SKDE pro-
grammer/debugger is isolated from the power supply used by the power module or the
dsPIC DSC. An isolated 3.3V rail is generated from the digital 3.3V rail using a
DC-to-DC converter (U10). This converter provides galvanic isolation rated up to
1000 V
4.2.7
The power module stage board provides two methods for transmitting/receiving data to
and from the system. Both communication methods are powered using the isolated
3.3V rail.
UART-to-USB communication port is based on a PIC18LFJ2450 device with a serial
emulator firmware. This device translates the USB signals to dsPIC DSC UART com-
patible signals. The firmware used for this serial emulator is enclosed in the CD shipped
along with the unit. Isolation for the UART-to-USB communication port is provided by
U25.
UART-to-RS-232 communication port is based on a RS-232 transceiver (U9). This
device translates the dsPIC DSC UART signals to UART compatible signals. Isolation
for the UART-to-RS-232 communication port is provided by U25.
Shunt jumpers J2 and J3 select the communication port. Table 4-5 shows the possible
configurations.
TABLE 4-5:
Designator
Note:
J2
J3
DC
/1 second.
Fault Circuitry
Isolation
Communication Ports
The comparator is open-drained and needs an external pull-up resistor.
Both the power module output and the comparator output share this pull-up
resistor creating an OR condition at the output.
Position
COMMUNICATION PORT CONFIGURATION
1-2
2-3
1-2
2-3
Connects UART receive line to RX.
Connects USB receive line to RX.
Connects UART transmit line to TX.
Connects USB transmit line to TX.
Description
DS70605A-page 39