DM330023-2 Microchip Technology, DM330023-2 Datasheet - Page 45

• Manufacturer Part Number: DM330023-2
• Description: Power Management IC Development Tools dsPICDE MCHV-2
• Manufacturer: Microchip Technology
• Type: Motor / Motion Controllers & Driversr

Specifications of DM330023-2

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: PIC24F, PIC24E, dsPIC33F, dsPIC33E
• Input Voltage: 90 V to 265 V
• Output Voltage: 15 V
• Interface Type: UART
• Output Current: 0.75 A
• For Use With: PIC24F, PIC24E, dsPIC33F, dsPIC33E

 2012 Microchip Technology Inc.
The dsPICDEM MCHV-2 Development Board uses discrete op amps (U13) to amplify
the shunt resistor signals. Alternatively, some of the PIC24 MCUs or dsPIC DSCs
include on-board op amps that can be used for this purpose. To accommodate these
two basic configurations, the dsPICDEM MCHV-2 Development Board comes with two
matrix boards.
The Internal Op amp Configuration matrix board is used to configure the development
board to use op amps internal to the PIC24 MCU or dsPIC DSC. This matrix board
bypasses the current feedback circuitry on the Power Module Board and directly connects
the shunt resistor signals to appropriate pins of the Plug-In Module.
The External Op amp Configuration matrix board is used to configure the development
board to use the current feedback circuitry on the Power Module Board. This matrix board
disconnects the shunt resistor signals from the Plug-In Module pins and connects the current
feedback circuitry output to the appropriate Plug-In Module pins.
4.2.6
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.
4.2.7
The power supply used by the push buttons, communication ports, and the Starter Kit
on Board programmer/debugger is isolated from the power supply used by the power
module or the PIC24 MCU or 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
4.2.8
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 PIC24 MCU or dsPIC
DSC UART compatible signals. 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 PIC24 MCU or 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.
configurations.
Note:
Note:
Fault Circuitry
Isolation
Communication Ports
Unless specified in the Plug-In Module information sheet, all PIMs are com-
patible only with the External Op amp Configuration matrix board. Certain
Plug-In Modules are designed to work with the Internal Op amp Configura-
tion matrix boards only. In this case, the corresponding PIM information
sheet (available at www.microchip.com/pims) will explicitly state this.
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.
DC
/1 second.
Table 4-3
shows the possible
DS52074A-page 45