Littelfuse PLEDxSW Series - Manual (Page 3)

3
PLED Open LED Protectors
Revision: May 23, 2013
©2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
PLEDxSW Series
PLEDxSW Series
6 LEDs in Series 50% Duty Cycle 10kHz 5 LEDs and 1 PLED in Series 50% Duty Cycle 10kHz
PLED in the Off-State 10kHz PLED device zeners and then turns fully on 10kHz
Channel 1: current through LEDs (318 mA)
Channel 2: voltage across PLED device (4.5 V) Channel 1: current through LEDs (346 mA) and PLED device once it is fully turned on 2.5 μsec later
Channel 2: voltage across PLED device (21.3 V before PLED crowbars with 2 V drop)
Note: These two graphs show the current magnitude through the LED string with and without the PLED included. There is no noticeable effect on the LED current magnitude when the
PLED is included in the circuit as compared to the LED current magnitude when the PLED is not in the circuit. (The conversion factor for the test measurement in the graphs above is
10mA/mV for the Pearson coil measurement, therefore, the current magnitude in the first figure is 10mA*8.9 = 89mA, while the second figure is 91mA.)