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Typical Connection

The IG100 series may be used in a wide variety of on-board power

distribution applications. However, it has been designed specifically to

power 962 type IGBT drivers. A typical connection to the MicroPower

Direct IGD962 is shown in the diagram above.

Some notes on this circuit (starting with the IG120-15

input) are:

1. The IG100 DC/DC should be mounted as close to the IGBT driver as

possible, to minimize the length of connecting board traces or wires.

2. The IG100 series does not include overload protection (typical of most

low power DC/DC’s). It is recommended that an external fuse be used.

The recommended fuse is shown in the model chart on page 2.

bring the circuit within the limits of EN 55022 Class B. The recom-

mended values for these components are shown in the table at right.

If meeting EN 55022 class B is not a concern, the inductor (LDM) can

be eliminated (as shown in the circuit diagram below). In this case, the

are shown in the table at right.

ensure peak gate current, these capacitors should have a low ESR.

The trace (or wire) between the DC/DC and the driver circuit should

be as short as possible.

6. The average output power of the driver circuit must be lower than

output power of the DC/DC.

Derating Curve

7. Recommended values for components are:

Component

4.7 µF/50V

4.7 µF/50V

4.7 µF/50V

LDM

12 µH

12 µH

12 µH

100 µF/35V

100 µF/35V

100 µF/35V

100 µF/35V

100 µF/35V

100 µF/35V

Go to the MPD website for complete information on our wide

line of IGBT driver products, including the IGD962. Or contact

the factory with any technical inquiries.