pled ? series www.littelfuse.com ?2009 littelfuse 1 pled ? series rohs description the open led protector provides a switching electronic shunt path when an led in an led array fails as an open circuit. this ensures that the entire array of leds will continue to function even if a single led in the array does not. this provides higher reliable lighting functions in applications such as headlights, aircrafts, aircraft runway lighting, roadside warning lights, etc. this device is compatible with one, two and three watt leds that have a nominal 3v forward characteristic. the pled ? is available in two surface mount packages, the do-214 and the quad flat pak no-lead (qfn). the qfns low pro?le, chip scale package (csp) is ideal for dense board applications. electrical characteristics part number marking v br breakdown v drm breakdown i h i s i t @v t v t @i t =1 amp critical rate of rise dv/dt volts volts mamps mamps amps volts volts min max min min max max max max pled6q12 pl6 6 16 6 5 600 1.0 3 250v/s pled6s pl6 6 16 6 5 600 1.0 3 250v/s PLED9Q12 pl9 9 18 9 5 600 1.0 3 250v/s pled9s pl9 9 18 9 5 600 1.0 3 250v/s pled13q12 pl13 13 26 13 5 600 1.0 3 250v/s pled13s pl13 13 26 13 5 600 1.0 3 250v/s features & bene?ts ? fast switching ? automatically resets after power cycle ? small footprint qfn and standard do214aa packages ? compatible with industrial lighting environments ? compatible with pwm dimming speeds of up to 10 khz ? rohs compliant and halogen-free agency approvals agency agency file number e133083 schematic symbol control circuit mt 2 mt1 (cathode) hf
pled ? series www.littelfuse.com ?2009 littelfuse 2 package symbol parameter value unit qfn 3x3 do-214 t j operating junction temperature range -40 to +150 c t s storage temperature range -65 to +150 c r ja thermal resistance: junction to ambient do-214: 90 qfn: 120 c/w thermal considerations i h i t i s v br v t +v -v +i -i v br v-i characteristics 0.4 -40 -20 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 case temperature (t c ) C ?c f o o i t a r i h i h t ( c c ? 5 2 =) 25 ?c 0 20 40 60 80 100 120 140 160 on/off switch pwm led driver v bat 12 vdc + - 2.0 , 1/4 w 110 k , 1/4 w q2 2n2222 q1 control circuit mt 2 mt 1 pled -8 -40 -20 -6 -4 0 2 4 6 8 10 12 14 junction temperature (t j ) C ?c r e pf o t n e cv br C e g n a h c% 25 ?c 0 20 40 60 80 100 120 140 160 v br vs. junction temperature normalized dc holding current vs. case temperature led interference test circuit (cathode)
pled ? series www.littelfuse.com ?2009 littelfuse 3 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 $ i b o o f m d v s s f o u u i s p v h i - & |