AN3338 datasheet(52/72 Pages) STMICROELECTRONICS

Part #	AN3338

Description	In recent years the variable speed motor control market has required high performance

PDF	72 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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52 / 72 page

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AN3338

52/72

Doc ID 18441 Rev 4

Positive DC-link

Pin: P

•

These are three DC-link positive power supply pins of the inverter, which offer

designers more flexibility in their approach. They are internally connected to the

collectors of the high-side IGBTs.

•

To suppress the surge voltage caused by the DC-link wiring or PCB pattern inductance,

connect decoupling capacitors close to

this pin and power ground (typically, high

frequency, high voltage, non-inductive capacitors of about 0.1 or 0.22

μF are used).

Negative DC-link

Pins: NU, NV, NW

•

These are the DC-link negative power supply pins (power ground) of the inverter.

•

These pins are connected to the low side IGBT emitters of each phase.

•

The power ground of the application should be separated from the logic ground of the

system and they should be reconnected at one specific point (star connection).

Inverter power output

Pins: U, V, W

•

Inverter output pins for connecting to the inverter load (e.g. motor).

AN3338 Datasheet(PDF) 52 Page - STMicroelectronics