DM330023-2 datasheet(39/64 Pages) MICROCHIP

39 / 64 page

Hardware

 2009 Microchip Technology Inc.

DS70605A-page 33

The fast-in connectors PFC_OUT “+” and PFC_OUT “-” provide DC bus voltage to the

Power Module Stage. The recommended cable size is 16-18 AWG or 1.0 to 1.5mm2. It

is also recommended that cables used for the power connections should be terminated

with blue or red crimp terminals. If crimp terminals are not used, care should be taken

to ensure that stray strands of wire do not short to adjacent terminals or the enclosure.

If possible, all wires should be stripped and tinned with solder before connecting to the

dsPICDEM MCHV development board terminals.

The 14-pin keyed connector provides the signals and power supply rails from and to

the Power Stage. These signals are shown in Table 4-1.

TABLE 4-1:

14-PIN KEYED CONNECTORS

4.2

POWER MODULE STAGE

This board has two main functions; the first is to control the motor using a dsPIC DSC

and a Power Module and the associated feedback signals for each control algorithm.

The second is to provide the safety means to interact with the user.

4.2.1

Plug-In Module Configuration

This section summarizes the resistor configuration required to connect the PIM pins to

dsPIC DSC pins. The following PIMs can be configured on the dsPICDEM™ MCHV

Development System:

• dsPIC33FJ256MC710 PIM (MA330013)

• dsPIC33FJ12MC202 PIM (MA330014)

• dsPIC33FJ32MC204 PIM (MA330017)

• dsPIC33FJ128MC804 PIM (MA330018)

Note: The user should only access the power terminals when the system is fully

discharged (see the “Safety Notice” on page iii).

Number

Name

Type

3.3V, digital rail

Output

Not Connected

3.3V, analog rail

Output

AC input voltage feedback

Output

Ground, analog rail

Output

AC input current feedback

Output

Fault (Overcurrent OR Overvoltage condition)

Output

VAC zero crossing signal

Output

Ground, digital rail

Output

PWM signal for the PFC IGBT

Input

Ground, digital rail

Output

Not Connected

15V

Output

Not Connected

Note: The circuits for the hardware described in this section are shown in

Appendix A. “Board Layout and Schematics”.

Note: When using PIMs, make sure that the 28-pin SOIC dsPIC DSC is removed

from the dsPICDEM™ MCHV Development System.

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