Data Sheet rev 0.2

IRCS2277S

www.irf.com

page

8/20

May 5

OPERATING DESCRIPTION

Normal operating mode

The IRCS2277S demo board has to be connected to a board equipped with shunt resistors to be operated

properly.

IRMD22381Q, IRMD2214SS and IRMD22141SS driver boards can be connected with the IRCS2277S

current sensing board through the 40-pin connector J2 and the 3-pin connectors P4, P8 and P12.

J1 reflects J2 connector bringing all the signals to the controller board.

More information is available with gate driver board data sheets.

Pre-charge of the bootstrapped sections

High voltage current sensor sections are supplied by bootstrap topology technique.

It’s recommended to pre-charge the bootstrap supplies before starting to drive the motor with the preferred

driving scheme.

BOARD Customization

This demo board is meant to be flexible for self-customization. Place for many spare components allow to

verify functionality of the current sensors under different external configurations.

This section will go through the possible customizations of the board.

Bootstrap circuit

Figure 4: Bootstrap circuit

VCC

VSS

*

**

15V

*

**

DC+

Phase

+