for further information contact your local stmicroelectronics sales office. june 2012 doc id 023248 rev 1 1/4 4 STEVAL-TLL012V1 4-channel led driver with charge pump based on the stp4cmp data brief features operating voltage range: 2.7 v to 5.5 v full rgb function support 4-channel led driver with individual on/off control directly from input pins individual programmable output current for the 4 channels through 4 external resistors with a max. capability of 30 ma absolute output current accuracy of max. 7% and channel-to-channel mismatch of max. 4% selectable charge pump enable/disable thermal protection rohs compliant description the STEVAL-TLL012V1 demonstration board demonstrates the performance of the stp4cmp, a charge pump based 4-channel led driver designed for rgb illumination or lcd display backlighting. this device works off a battery with an input voltage between 2.7 v - 5.5 v. the device generates regulated current sinks with high absolute and channel-to-channel accuracy to drive up to 4 leds. it can support leds with forward voltage as high as 3.8 v. the current sink for each channel can be set with 4 individual external resistors. each channel is controlled independently. the pwm control can be applied directly to the 4 en (enable) inputs to provide brightness control. www.st.com
schematic diagram STEVAL-TLL012V1 2/4 doc id 023248 rev 1 1 schematic diagram figure 1. schematic diagram ! - v , % $ , % $ , % $ # . / . / . / . # 0 ) 3 % 4 ' . $ % . , % $ 6 / 5 4 6 # # 2 3 % 4 / . ) 3 % 4 2 3 % 4 ) 3 % 4 2 3 % 4 ) 3 % 4 2 3 % 4 # 0 ? 3 e l ' . $ # # # / 5 4 , % $ , % $ , % $ , % $ #
STEVAL-TLL012V1 revision history doc id 023248 rev 1 3/4 2 revision history table 1. document revision history date revision changes 08-jun-2012 1 initial release.
STEVAL-TLL012V1 4/4 doc id 023248 rev 1 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 he rein 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 as sumes 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. i f 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 whatsoev er 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 two authorized st representatives, 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 whatsoev er, any liability of st. st and the st logo are trademarks or register ed 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. ? 2012 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com
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