IRSM505-084

IRSM515-084 Series

8

www.irf.com

© 2014 International Rectifier

November 24, 2014

Application Notes

A basic application schematic is shown below.

HVICs

VCC

HIN1

HIN2

HIN3

LIN1

LIN2

LIN3

VTH

VB1

VB2

VB3

U, VS1

V, VS2

W, VS3

Power

Supply

PWMWH

PWMVH

PWMUH

PWMVL

PWMWL

GATEKILL

AIN1

IFB+

IFB-

IFBO

VSS

VDD

VDDCAP

XTAL0

XTAL1

AIN2

SPD-REF

COM

VBUS

IRMCF171

PWMUL

4.87k

2M

7.50k

1nF

0.25

6.04k

7.68k

+

-

3V

IRSM505-084

Figure 3: Basic sensor-less motor drive circuit connection. Motor is connected to U, V, W

A complete reference design board for running any permanent magnet motor via sensorless sinusoidal control is

available. The board

– photo below – features the µIPM™-DIP module and the iMotion™ digital control IC.

Reference design kits are available on the International Rectifier website (irf.com > Design Resources >

Reference Designs > Intelligent Power Modules)

Figure 4: Reference design board featuring the

µIPM™-DIP module and the iMotion™ IRMCF171 digital control IC