AN3338 datasheet(40/72 Pages) STMICROELECTRONICS

40 / 72 page

Package

AN3338

40/72

Doc ID 18441 Rev 4

The main properties of DBC ceramic substrates

The main properties of DBC include good mechanical strength, mechanically stable shape,

good adhesion and corrosion resistance, and also offer:

•

Excellent electrical isolation

•

Very good thermal conductivity

•

The thermal expansion coefficient is close to that of silicon, so no interface layers are

required

•

Good heat spreading

•

May be structured just like printed circuit boards or “IMS substrates”

•

Environmentally clean

3.2

PCB

A PCB (printed circuit board) is used to mechanically support the gate driver ICs and to

electrically connect those using conductive pathways.

Thanks to the internal PCB it is possible to realize various electric configurations, necessary

to add advanced features, and to insert several passive components, such as resistors or

capacitors, to properly bias the gate drivers. The insertion of filter capacitors, directly across

the gate driver pins, improves the SLLIMM noise immunity and helps users to work in a

safer condition.

Figure 27 shows the internal PCB detail.

3.3

Package structure

Figure 28 and Figure 29 contain images and an internal structure illustration of the SDIP-

25L and SDIP-38L package.

Figure 27. PCB structure

AN3338 Datasheet(PDF) 40 Page - STMicroelectronics