© 2012 Fairchild Semiconductor Corporation

3

FEBSPM3SPM45_M01MTCA

• Rev. 1.0.1

This user guide supports the SPM3V2_V4 / SPM45H evaluation board, identifiable by

the marking FEBSPM3SPM45_M01MTCA on the topside of the PCB. It should be used

in conjunction with SPM3V2_V4 / SPM45H product datasheets, as well as Fairchild

Semiconductor’s application notes and technical support team available through the

website at http://www.fairchildsemi.com.

1. Overview of the Evaluation Board

This motion Smart Power Module (SPM®) evaluation board is designed to evaluate

Fairchild Semiconductor’s SPM3V2_V4 and SPM45H SPM families of parts. The motion

SPM is installed as the motor power module on the evaluation board to drive a three-phase

AC Induction Motor (ACIM), Brushless DC (BLDC) motor, Brushless AC (BLAC)

motor, or Permanent-Magnet Synchronous Motor (PMSM). A Switched-Mode Power

Supply (SMPS) is integrated into the design, along with the necessary bulk capacitors and

microcontroller (MCU) interface circuitry. This allows evaluation of Fairchild’s motion

SPM products with a minimum investment of time, expense, and peripheral equipment. As

this board is designed for a wide variety of motor types, not all included circuitry is

required for all types of motors. Some motor types may require some additional circuitry be

added, depending on the control algorithms being implemented.

By default, the FNB41560 (600 V/15 A SPM45H) is installed as the motor power

module, as shown in Figure 9. It is possible to replace the provided SPM45H module

with a part from the SPM3_V2 family (i.e. FSBB30CH60, 600 V/30 A) per Figure 10 or

the SPM3_V4 family (i.e. FSBB30CH60C, 600 V/30 A) per Figure 11. Depending on the

power level of the device, some additional discrete component value changes may be

required. The most common reason to consider a SPM3V2_V4 device over the SPM45H

family is to increase motor power level.

The evaluation board is designed to connect to either AC or DC power sources feeding

current to the motor. There are three example test configurations in Section 3. The three-

phase motor output terminals (U, V, W) from the SPM should be connected to the motor

windings. Three bootstrap power supply circuits are designed into the evaluation board,

one per phase. A bootstrap capacitor, charge resistor for charging the capacitor, and the

blocking diode for high-voltage isolation make up each bootstrap supply. With SPM45H

and SPM3_V4 modules, R50-55 and D5-7 are not required. These extra bootstrap

positions are provided for compatibility with SPM3_V2 modules.

The microcontroller (MCU) or motion-controller development board connects to this

SPM board via the provided connector. Six low-pass filters are used between the signal

input connector and the gate input signal pins of the FNB41560. Short-circuit current

protection is provided by a single shunt resistor, op amp, and low-pass filter. Additional

circuitry is included to monitor bus voltage, inverter phase current, and module

temperature. This evaluation board is designed to support a wide array of test conditions

and requirements.