ZSLS7025 boost led driver ? 201 2 zentrum mikroelektronik dresden ag rev. 1.00 all rights reserved. the materia l c o ntained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the c opyright owner. the information furnished in this publication is su bject to changes without notice. brief description the ZSLS7025, one of our zsls family of led control ics, is a constant current boost converter designed for driving high - b rightness led s . it is optimal for driving mult iple white leds connected in series so that the led current is uniform for better brightness and color control. the wide input range and high output current enables diverse industrial , after - market auto motive, and consumer lighting applications . the zsls70 25 output current is adjustable v ia an external current sense resistor and can deliver stable constant output current from a few milliamps up to 2a or higher . the ZSLS7025 drives a constant current into the load. the control loop features a pulse frequency modulated (pfm) architecture that is inherently stable and does not need loop compensation. the ZSLS7025 supports pulse - width modulation ( pwm ) or linear voltage dimming, which allows flexible control of the led luminance. the ZSLS7025 can operate in appl ications with a wide inpu t voltage range from 5v to 100v . an integrated over - voltage protection ( ovp ) circuit protects the system , even under no - load conditions. the over - voltage protection is adjustable via external resistors r 1 and r 2 . features ? wide ap plication input voltage range: 5v to 100v ( higher voltage supported. s ee section 2.1 in the data sheet. ) ? constant current output limited only by external component selection ? no loop compensation required ? intern al over - voltage protection ? internal over - temperature protection ? brightness control via pwm or dc voltage control signal input ? sop - 8 package benefits ? high efficiency: up to 95 % ? minimum b ill of m aterial s ? small form - factor package available support ? demonstra tion kit physical characteristics ? junction temperature: - 40 c to 125 c ? rohs compliant for additional information on our led driver family, visit www.zmdi.com/products/led - drivers/ ZSLS7025 typical application circuit t o f f g a t e z s l s 7 0 2 5 l e d s t r i n g v i n = 5 t o 1 0 0 v d c c o u t r 1 l 1 c i n d 1 o v p g n d r f b v d d c v d d r v d d r t o f f a d j r 2 r c s q 1 f b c s
ZSLS7025 boost led driver ? 201 2 zentrum mikroelekt ronik dresden ag rev. 1.00 all rights reserved. the material c o ntained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the c opyright owner. typical applications ? retro - fit lighting ? architectural/building lighting ? mr16 lights ? replacement tubes ? selv lighting ? led b acklighting ? signage and outdoor lighting ? general purpose low - voltage industrial and consumer applications ZSLS7025 block diagram ordering information product sales code description package ZSLS7025 - zi1r ZSLS7025 C boost led driver sop - 8 (tape & reel) ZSLS7025 kit - d1 ZSLS7025 pcb - d 1 demo board, 1 zled - pcb10, and 5 ZSLS7025 ics kit s ales and further information www.zmdi.com led_drivers@zmdi.com zentrum mikroelektronik dresden ag grenzstrasse 28 01109 dresden germany zmd america, inc. 1525 mccarthy blvd., #2 12 milpitas, ca 95035 - 7453 usa zentrum mikroelektronik dresden ag, japan office 2nd floor, shinbashi tokyu bldg. 4 - 21 - 3, shinbashi, minato - ku tokyo, 105 - 0004 japan zmd far east, ltd. 3f, no. 51, sec. 2, keelung road 11052 taipei taiwan zentrum mikroelektr onik dresden ag, korean office posco centre building west tower, 11th floor 892 daechi, 4 - dong, kangnam - gu seoul, 135 - 777 korea phone +49 (0)351.8822.7.533 fax +49 (0)351.8822.8.7533 phone +855 - ask - zmdi (+855.275.9634) phone +81.3.6895.7410 fax +81.3.68 95.7301 phone +886.2.2377.8189 fax +886.2.2377.8199 phone +82.2.559.0660 fax +82.2.559.0700 disclaimer : this information applies to a product under development. its characteristics and specifications are subject to change witho ut notice. zentrum mikroele ktronik dresden ag (zmd ag) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. the information furnished hereby is believed to be true and accurate. however, under no circumstances shall zmd ag be liable to any custom er, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. zmd ag hereby expres sly disclaims any liability of zmd ag to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of zmd ag for any da mages in connection with or arising out of the furnishing, p erformance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise. n l e d l 1 r t o f f v i n c v d d 5 t o 1 0 0 v d c r v d d c i n d 1 c o u t q 1 r 2 r 1 u v l o p o r b l a n k i n g 5 0 0 n s v d d c u r r e n t m i r r o r c s a d j 5 0 k 9 0 0 k 1 0 0 k v r e f 4 v r e f 1 5 v c l a m p v o l t a g e r e g u l a t o r b l o c k + - g a t e f b o v p v r e f 2 v r e f 1 v r e f 1 ( 1 . 0 v ) v r e f 2 ( 0 . 3 v ) v r e f 3 ( 0 . 2 5 v ) v r e f 3 v r e f 4 ( 0 . 0 5 v ) - + - + t o f f s r q v d d + - + - - + z s l s 7 0 2 5 g n d 4 1 3 6 2 5 7 8 r f b r c s
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