User`s guide

August 2012L010185

Setting the Output Current

The output current on the MBC10SI1 is set by the on-board potentiometer R29 (Refer to Dimen-

sions/Jumper and Potentiometer Locations). This current adjust potentiometer determines the

per phase peak output current of the driver. This relationship between the output current and the

potentiometer setting is as follows:

Potentiometer Settings

Reducing Output Current

Reducing the output current is accomplished automatically depending on the current reduction

setting in the SMPG-SMSI software. The amount of current per phase in the reduction mode is

approximately 70% of the set current. When the current reduction circuit is activated, the current

reduction resistor is paralleled with the current adjustment potentiometer. This lowers the total

resistance value, and thus lowers the per phase output current. This is done when the pulse

generator is not running.

Peak Current Potentiometer Setting

1.5A 0%

2.4A 10%

3.0A 20%

4.0A 30%

5.2A 40%

6.4A 50%

7.7A 60%

8.7A 70%

9.8A 80%

10.0A 90%

10.3A 100%