IRMCS1071

Hardware Description

A top view of IRMCS1071 is shown in Figure 2.

RS232 Connector

JTAG Connector

Power Supply

Isolation Boundary

Magnetic Isolator

Diode Bridge

Rectifier

Reset Switch

Digital I/O

IRMCK171 IC

with socket

EMI Filter

IRAM

Powermodule

Power LED

NTC

Earth Ground

DC Bus Capacitor

Figure 2 Top View of IRMCS1071

PCB

The printed circuit board has two electrical layers and its size is 4.5 x 5 inches.

Isolation Boundary

Note that there are two different grounds on this system. The RS232 connector and JTAG connector are

isolated by magnetic isolators so that the user can connect their debugger and computer without isolating

the computer. However, the user should keep in mind that most parts of the hardware have negative DC

bus ground and it is necessary to isolate the scope when waveforms are measured.

Power

IRMCK171 requires only a 3.3V power supply. Internally, the controller creates a 1.8V and a 1.2V required

for the ADC.

This document is the property of International Rectifier and may not be copied or distributed without expressed consent.

7