2013/06/18 ver.5 page 1 SP2260 60v buck led driver description applications SP2260 is the monolithic ic designed for a step-down led driver capable of driving 1.5a/ 3a load without an additional transistor. the input voltage range is up to 60v. its feedback voltage, v fb , is 200mv. the SP2260 operates at a switching frequency of 52khz. the external shutdown function is controlled by a logic level on the on/off pin and then the circuit comes into the standby mode with i stby ~50a (typ.). the on/off pin may be used for the analog dimming. as the voltage on the on/off pin is increased from 0.07v to 0.67v, the voltage on the fb pin falls from 200mv to 0. the self-protection features include a cycle-by-cycle current limit and a thermal protection. SP2260 is available in standard to-263 and sop-8 with power pad . package. ? dc/dc led driver applications ? backlighting for flat panel displays ? general purpose constant current source ? automotive ? chargers features pin configuration psop-8l to-263-5l ? v in max = 60v ? v fb = 200mv ? frequency 52khz ? i led max 1.5a with psop-8l ? i led max 3.0a with to-263-5l ? on/off input may be used for the analog dimming ? thermal protection ? cycle-by-cycle current limit part marking psop-8l to-263-5l
2013/06/18 ver.5 page 2 SP2260 60v buck led driver typical applcation circuit pin description pin (psop-8l) pin (to263-5) symbol description 1 1 v in supply voltage input 2 2 sw switch 3 4 fb feedback 4 5 dim on/off and linear dimming 5~8 3 gnd ground ordering information part number package part marking SP2260s8rg psop- 8l SP2260 SP2260s8rgb psop- 8l SP2260 SP2260t265rg to-263-5l SP2260 SP2260t265rgb to-263-5l SP2260 SP2260s8rg : 13? tape reel ; pb ? free SP2260s8rgb : 13? tape reel ; pb ? free ; halogen ? free SP2260t265rg : 13" tape reel ; pb ? free SP2260t265rgb : 13" tape reel ; pb ? free ; halogen ? free block diagram
2013/06/18 ver.5 page 3 SP2260 60v buck led driver absoulte maximum ratings (t a =25 unless otherwise specified) parameter symbol value unit dc supply voltage v in 63 v on/off and dimming voltage dim -0.3~v in v sw voltage sw -0.8 v fb voltage fb -0.3~v in v operating temperature t opr -40 125 maximum junction temperature t j(max) 150 storage temperature t s -65 150 the ic has a protection circuit against static electricity. do not apply high static electricity or high voltage that exceeds t he performance of the protection circuit to the ic. electrical characteristics (t j =25 , v in =12v, i load =350ma unless otherwise specified) symbol parameter conditions min. typ. max. unit v in operating voltage 5.5 60 v v fb feedback voltage v in = 12v, i load = 350ma, dim = 0v 190 200 210 mv v in = 5.5v~60v, i load = 350ma, v dim = 0v 180 220 mv i fb feedback current v fb = 250mv, dim= 0v -150 -50 150 na f osc oscillator frequency 47 52 58 khz v sat saturation current i sw =1.5a psop-8l 1.35 1.5 v i sw =3.0a to-263-5l 1.35 1.5 v d max max duty 100 % i lo sw leakage current v in =60v, v fb = 1.5v, v sw = 0v -0.3 -0.07 ma c l current limit psop-8l 2.5 4.5 a to-263-5l 4.5 6.5 a v th dim threshold voltage 1.0 1.4 2.0 v i ih input current on/off v on/off = 2.5v -1.0 0.01 1.0 ua i il input current on/off v on/off = 0 v -1.0 -0.3 1.0 ua i q quiescent current v fb = 1.5v 5.3 10 ma i stby standby current v in =60v, v dim = 5v 50 200 ua v dim dimming voltage v in = 12v, i load = 0 600 670 750 mv
2013/06/18 ver.5 page 4 SP2260 60v buck led driver performance characteristics (circuit for typical application circuit) fig.1 feedback voltage fig.2 normalized feedback voltage fig.3 switch saturation voltage (no any components connected to sw-pin. vfb=0) fig.4 oscillator frequenc y fig.5 dimming voltage fig.6 normalized dimming voltage
2013/06/18 ver.5 page 5 SP2260 60v buck led driver psop- 8l package outline
2013/06/18 ver.5 page 6 SP2260 60v buck led driver to-263 package outline
2013/06/18 ver.5 page 7 SP2260 60v buck led driver information provided is alleged to be exact and consist ent. sync power corporation presumes no responsibility for the penalties of use of such information or for any viol ation of patents or other right s of third parties which may result from its use. no license is granted by allegati on or otherwise under any pat ent or patent rights of sync power corporation. conditions mentioned in this publ ication are subject to change without notice. this publication surpasses and replaces all information previ ously supplied. sync power corporation products are not authorized for use as critical components in life suppor t devices or systems withou t express written approval of sync power corporation. ?the sync power logo is a registered trademark of sync power corporation ?2012 sync power corporation ? printed in taiwan ? all rights reserved sync power corporation 7f-2, no.3-1, park street nankang district (nksp), taipei, taiwan 115 phone: 886-2-2655-8178 fax: 886-2-2655-8468 http://www.syncpower.com
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