Brake Function

In order to use the integrated brake switch, an external power resistor should be connected between pins BR and

P of terminal block J5. This resistor should be dimensioned for desired braking performance. Carefully choose the

value of this component to ensure the brake IGBT integrated within the power module remains below its maximum

current capability.

2. Power Module Description

The power module integrates all rectifiers, ultra-fast short circuit rated IGBTs, fast recovery commutation diodes ,

brake IGBT and other processing components needed for a 3HP Motor Drive or other loads requiring a 3-phase

variable frequency and/or PWM drive. Semiconductor dice are mounted on a thermally effecient substrate and

housed within a convenient, potted module. When connected to the host PCB, the power components become

configured as a 3-phase input bridge rectifier, and IGBT inverter with current sensing shunt resistors. An NTC

thermistor is bonded to the substrate to furnish the host PCB with accurate temperature reading. A galvanically

isolated metal backplate provides excellent thermal coupling to an external heatsink, which is necessary for full-

load operation.

Circuit Layout within the module is carefully designed to minimize inductance in the power path, reduce noise

during inverter operation and to improve inverter efficiency. The IR2233 host board should be soldered to the power

module pins to complete the assembly. For detailed electrical specifications, please refer to the power module

datasheet.

IRMDAC3

Reference Design Data Sheet (October 1998)