STEVAL-ILL022V1 25 W LED street light with an 80 W solar energy charger based on the STM32 Data brief Features ■ MPPT maximizes electricity conversion efficiency from solar panels ■ Self-adapting charger for 12 V/24 V battery ■ Automatic day/night/weather detection ■ Automatic battery/mains switch over ■ Constant current control for LED lamps ■ Battery charge control ■ Optional LED lighting duration mode ■ Easy system-monitor via debug LED indicators ■ Full protection function for OTP, OCP, and UVP ■ STEVAL-ILL022V1 RoHS compliant Description The solar-LED streetlight controller is made up of one 80 W battery charger and one 25 W LED driver. When the sun is present the charger converts the electricity from the solar panel then charges the battery. In a dark ambient where no sun is present the battery powers on the LED lamp as a streetlight. When wet or cloudy weather persists for several days the battery gradually runs out of power. The controller then switches on the AC mains supply instead of the battery to power on the LED until the battery is fully charged again. August 2010 Doc ID 17833 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Doc ID 17833 Rev 1 6$$ 6 ?3OLAR 2 2 + 6$$ 2 + 0/3 6## '.$ 2 + 2 + + + 2 + 2 + 2 2 2 + 2 + 2 + $ 63 $ # # # U& "!4 "!4 $ # # $) 0 $) 0 $) 0 $) 0 4$/ 4234 4?, %$ ! 2 $ # N& 6$2 2 2 )?"ATTERY "!4 $ 0" 0" 0""//4 0"*4$/ 0"*.4234 0" 0" 0" 0" 0" 0" 0" 0" 0" 0" 0" 0/3 6## .%' 2 + 2 + '.$ $ 6" $ "!4 "!4 $ "//4 .234 /3#?/54 /3#?) . 0$ 0#/3#?/54 0#/3#?) . 0#4!- 0 %224# 0# 0# 0# 0# 0# 0# 0# 0# 0# 0# 0# 0# 0# # U& 2 # P& 2 -(Z 8 2%3%4 # P& 2 + + 2 $ , $ , $ , $ , $ , $ , $ , %$ $RIVER 4HERM AL 4?$RIV ER #HARGER 4HERM AL 2 6$$! 2 + N& "LUE "LUE "LUE "LUE 2ED 'REEN # 2 + .4# N& 4?#HARGER $ ) , %$ $ N& "!4 "!4 '.$ 6$$ 2%3%4 # " 2 + 6$$! 2 1 --"4 2 6BA 2 + #/.?" 2 + 2 M 6 2 2 M ! '.$ 5 '.$ $ 2 N& # N& # 4?, %$ # P& + $ "!4 56## 2 # U& 6 N& # 2 + "EAD , # N& 2 + # 6$$ 6$$! # 2 # 6$$ '.$ # P& # 2 6"!4 633? 633? 633? 633? 6$$? 6$$? 6$$? 6$$? 5" 34-& 2X4 6$$! 633! '.$ N& # $ 6 # "!4 $ "EAD '.$ , , %$?& AULT 6$$! + 2 $ "!4 --"4 1 N& N& N& N& N& # 2 + 2 + U& # '.$ 5! , -$ 2 + 56## 2 + --"4 1 , %$ 0 6 , %$?0 ROTECTION '.$ 2 6?, %$ 2 5 43#!) , 4 N& 2 # N& 5" , -$ '.$ )?, %$ 2 + U& # U& # '.$ 6 6*0 # U& '.$ "!4 , %$ 4HERMAL 2 2 + + 2 6 '.$ 2 + # P& 6$$! 2 + , !"$ 42 , , !"$ 42 ). /54 .# .# '.$ '.$ '.$ '.$ 5 2 + 5! , -$ '.$ 2 # U& P& # 5" , -$ P& # 4?"AT T ERY 0 2 # N& #/.?, "ATTERY 4HERM AL 6$$! 2 + N& # N& # 2 2 + # P& 2 + '.$ 56## # P& U( 4 # N& 2 + 56## # U& 6 # U& 2 + '.$ 340 3(! $ $ '.$ $ 340 3(#& 0 1 340 .& &0 6 $ 2 M 1 "# 2 # U& 0 # U& $ '.$ # U& # N& 49.2' 1 3-!*! 42 2 1 --"4 6 $ 6 # U& 2 # 2 + .4# N& 2 6$$! 2 + + 2 2 2 2 2 2 2 + # )?, %$ "# 1 # P& 6, %$ $ '.$ 5 43) , 4 .%' /54 6## 0/3 2 + '.$ # U& 2 + "ATTERY 6BA , %$?0 ROTECTION U& "!4 "!4 2 '.$ 6$$! #/.?" # 6$$! 2 + 2 + '.$ N& # 6?, %$ $ "!4 2 + 6$$ 2 + '.$ 2 $ 0 340 3#& 0 $ "!4 0 & ! 6 6BA 6?"ATTERY 07-?$RIV ER 2 + -AINS?%NABLE "!4? & 5, , "!4? , %$ $%"5'?, %$ $%"5'?, %$ $%"5'?, %$ $%"5'?, %$ 4?"ATTERY 63 , %$?& AULT 4?$RIV ER 6, %$ ), %$ '.$ N& "!4 "!4 '.$ $ )" $ 6$$! N& 2 + # )?"ATTERY #6$2 '.$ U& # 2 U& U& 6 # # 2 2 '.$ 2 2 2 2 6 1 --"4 2 + 1 "# 6$$! , 5 43#!) , 4 340 3(#& 0 5 43) , 4 34-& 2X4 '.$ N& # '.$ /54 '.$ '.$ 'ND 6P 6M U( 4 $2) 6%2 42!.3 2 + # U& 6?"ATTERY 2 + 0! 7+ 50 0! 0! 0! 0! 0! 0! 0! 0! 0! 0! 0! 0! 0!*4-337$) / 0!*4#+ 37#, + 0!*4$) 5! N& "!4 "!4 '.$ 2 + # )3 $ 6$$! 2 $ 2 + 6 P& P& # # /UT 6CC $ 340 3, ! N& # 2 2 + '.$ 6 2 + "!4 07-?#HARGER 2 + 5! , -$ 1 340 .& &0 2 $ )?3OLAR 6$$ 6 U& 63 $ 6$$! # U& 07-?$RIV ER )" 6" 07-?#HARGER 4?#HARGER 63 )3 07-?) NPUT 4-3 4#+ 4$) 2 + 2 + 56## 2 + 'ATE?)NPUT '.$ U& '.$ N& # 6 ?3OLAR --"4 1 # '.$ # U& # P& + N& N& N& N& # "!4 "!4 '.$ 2 + 1 "# 5 43) , 4 2 # U& 2 + 2 + 6 + 2 '.$ '.$ 6$$! /54 2 + .%' '.$ $"'!#+ $"'21 2%3%4 4$/ 24#+ 4#+ 4-3 4$) 4234 2 2 2 2 2 + # U& N& # 6?3OLAR "!4 2 + 37 $) 0 *4! ' #. $ 2 + 2 + 2 + $ "!4 07-?) NPUT 2 + 'ATE?)NPUT 2 1 340 .& 6 3 6$$! 3OLAR #ELLS 0 6?3OLAR N& " # '.$ 2 )?3OLAR 3- ! *! 4 2 /UT 6 P ' ND 5" , -$ 6 CC 6M 56## 2 " U& # 6$$! Circuit schematic 6O Figure 1. . # ' ND ' ND Circuit schematic ) NHIBIT ' ND ' ND 6 IN 1 2/4 6 Circuit schematic STEVAL-ILL022V1 !-6 STEVAL-ILL022V1 2 Revision history Revision history Table 1. Document revision history Date Revision 18-Aug-2010 1 Changes Initial release. Doc ID 17833 Rev 1 3/4 STEVAL-ILL022V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 4/4 Doc ID 17833 Rev 1