zspm4521 high - efficiency charger for li - ion batteries with photovoltaic sources ? 201 3 zentrum mikr oelektronik dresden ag rev.1.00 february 14, 2013. 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 copyright owner. the information furnishe d in this publication is subject to changes without notice. for more information, contact zmdi via analog@zmdi.com . brief description the zspm4521 is a dc/dc synchronous switching lithium - ion ( li - i on ) b attery c harger with fully inte - grated power switches, internal compensation, and full fault protection. it uses a temperature - indepen - dent photovoltaic maximum power point trac king (mp p t) function to optimize power output from the source during full - charge constant - current (cc) m ode. its switching frequency of 1mhz enables the use of small filter c omponents, resulting in smaller board space and reduced bill - of material cos ts. during full - charge constant - current mode, the duty cycle is controlled by the mp p t regulator. once the batterys termination voltage is reached, the regula - tor operates in constant v oltage m ode. in this mode, the zspm4521 modulate s the charging cur rent until the battery reaches full charge . when the regulator is disabled ( the en pin is low), the device draws 1 0 a (typical) quiescent current (disabled mode) . the zspm4521 includes supervisory reporting through the n flt ( i nverted f ault) open - drain output to interface other components in the system. device programming is achieved by an i2c ? * interface through the scl and sda pins. benefits ? up to 1.5a of continuous output current in full - charge constant current (cc) m ode ? high efficiency C up to 92% with typical loads available support ? evaluation kit ? documentation * i 2 c ? is a trademark of nxp. features ? t emperature - independent photovoltaic maximum power tracking (mp p t) regulator ? v bat reverse - current blocking ? programmable temperature - compensated termination voltage : 3.94v to 4.18v 1% ? user programmable maximum charge current: 50ma to 1500ma ? s upervisor for v bat reported at the n flt pin ? input supply under - voltage lockout ? full protection for vbat over - current, over - temp eratu re , vbat over - voltage, and charging timeout ? charge status indication ? i 2 c ? program interface with eep rom registers related zmdi smart power products ? zspm4523 dc/dc synchronous switching super capacitor charger with mppt regulator ? zspm4551 high - e fficiency li - ion battery c harger ? zspm4121 ultra - low power under - voltage switch ? zspm4141 ultra - low - power linear regulator physical characteristics ? wide input voltage range: 4.0v to 7.2v ? junction operating temperature: - 4 0c to 12 5c ? package: 16 - pin p qfn (4 mm x 4 mm ) zspm4521 application circuit c o u t l o u t r s e n s e r r e f p h o t o v o l t a i c c e l l s b a t t e r y r t h m r p u l l u p ( o p t i o n a l ) v d d r p u l l u p ( o p t i o n a l ) v d d c i n c v d d g n d e n v t h e r m s w n f l t v b a t s c l p g n d v i n s d a v t h _ r e f v s e n s e v d d z s p m 4 5 2 1
zspm4521 high - efficiency charger for li - ion batteries with photovoltaic sources ? 201 3 zentrum mikroelektronik dresden ag rev. 1.00 february 14, 2013 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 ? portable solar chargers ? off - grid systems ? wireless sensor networks ? hvac controls zspm4521 block diagram ordering information ordering code description package zspm4521aa1w zspm4521 high efficiency li - ion battery charger for photovoltaic sources 16 - pin pqfn / 7 reel (1000 parts) ZSPM4521AA1R zspm4521 high efficiency li - ion battery charger for photovoltaic sources 16 - pin pqfn / 13 reel (3300 parts) zspm4521kit zspm4521 evaluation kit sales and further information www.zmdi.com analog@zmdi.com zentrum mikroelektronik dresden ag grenzstrasse 28 01109 dresden germany zmd america, inc. 1525 mccarthy blvd., #212 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 mikroelektronik dresden ag, korea office u - space 1 building 11th floor, unit ja - 1102 670 s ampyeong - dong bundang - gu, seongnam - si gyeonggi - do, 463 - 400 korea phone +49.351.8822.7.776 fax +49.351.8822.8.7776 phone +855.275.9634 (usa) phone +408.883.6310 fax +408.883.6358 phone +81.3.6895.7410 fax +81.3.6895.7301 phone +886.2.2377.8189 fax +886.2.2377.8199 phone +82.31.950.7679 fax +82.504.841.3026 disclaimer : this information applies to a product under development. its characteristics and specifications ar e s ubject to change without notice. zentrum mikroelek tronik dresden ag (zmd ag) assu mes no obligation regarding future manufacture unless otherwise agreed to in writing. the information furnished hereby is bel ieved to be true and accurate. however, under no circumstances shall zmd ag be liable to any customer, 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 expressly d isclaims any liability of z md 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 an y damages in connection with or arising out of the furnishing, performance or use of this techni cal data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise. v i n b a t t c u r r e n t c o n t r o l g a t e d r i v e g a t e d r i v e g a t e d r i v e c o n t r o l v b a t s w o s c i l l a t o r r a m p g e n e r a t o r c o m p a r a t o r e r r o r a m p g n d m o n i t o r & c o n t r o l b a t t t h e r m a l c o n t r o l o v e r - v o l t a g e p r o t e c t i o n v b a t v i n v i n ? e n p g n d n f l t c o u t l o u t b a t t e r y c o m p e n s a t i o n n e t w o r k v t h _ r e f v t h e r m p h o t o v o l t a i c c e l l s ~ 5 v @ 4 5 0 m a v r e f v b a t r t h m r r e f r s e n s e v s e n s e m p p & c u r r e n t c o n t r o l s c l s d a v i n c i n v d d c v d d v d d r e g u l a t o r v i n b a c k g a t e b l o c k i n g z s p m 4 5 2 1 i 2 c ? * i n t e r f a c e * i 2 c ? i s a t r a d e m a r k o f n x p .
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