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2016-03-0004

PT0489-5

04/29/16

9

PI5PD2560/2561

Dual Channel,

Adjustable Current-Limited Power Switch

Figure 9. Current-Limit Threshold vs. RILIM

APPLICATION 1: DESIGNING ABOVE A MINIMUM CURRENT LIMIT

Some applications require that current limiting cannot occur below a certain threshold. For this example, assume that 2 A must be

delivered to the load so that the minimum desired current-limit threshold is 2000 mA. Use the IOS equations and Figure 9 to

select RILIM.

Select the closest 1% resistor less than the calculated value: RILIM = 25.5 kΩ. This sets the minimum current-limit threshold at

2A. Use the IOS equations, Figure 9, and the previously calculated value for RILIM to calculate the maximum resulting current-

limit threshold

The resulting maximum current-limit threshold is 2382 mA with a 25.5 kΩ resistor

(2)

61200V

1

1.056

61200V

52850V

52850V

25.5