data brief for further information contact your local stmicroelectronics sales office. january 2012 doc id 022723 rev 1 1/5 5 EVLALTAIR05T-5W altair05t-800 5 w wide range cv-cc optoless adapter demonstration board features universal input mains range: 90 - 264 vac, frequency 45 - 65 hz output voltage: 5 v@1 a continuous operation optoless constant voltage - constant current output regulation standby mains consumption: < 100 mw @ 230 vac average efficiency: > 70% emi: according to en55022-class-b description this board implements a 5 w (5 v / 1 a) wide range mains battery charger with constant voltage-constant current, tailored for ac-dc chargers for mobile phones and adapters and other hand-held equipment. the core of the application is the altair05t-800, the first ?all-primary sensing switching regulator? of the new altair family. the ic combines a high-performance low-voltage pwm controller chip and an 800 v, avalanche- rugged power mosfet in the same package. the pwm chip is a quasi-resonant (qr) current- mode controller ic specifically designed for qr zvs (zero voltage switching at switch turn-on) flyback converters. the device is capable of providing constant output voltage (cv) and constant output current (cc) regulation using primary-sensing feedback. this eliminates the need for the optocoupler, the secondary voltage reference, as well as the current sensor, while still maintaining quite accurate regulation. in addition, it is possible to compensate the voltage drop on the output cable, so as to improve cv regulation on the externally accessible terminals. extremely low consumption under no load conditions is ensured thanks to a controlled burst- mode operation that, along with the built-in high- voltage startup circuit and the low operating current of the device, helps minimize the residual input consumption. although an auxiliary winding is required in the transformer to correctly perform cv/cc regulation, the chip is able to power itself directly from the rectified mains. this is useful especially during cc regulation, where the flyback voltage is generated by the winding drops. www.st.com
EVLALTAIR05T-5W 2/5 doc id 022723 rev 1 figure 1. output characteristics 9 $ & 9 $ & 9 2 8 7 > 9 @ , 2 8 7 > $ @
EVLALTAIR05T-5W doc id 022723 rev 1 3/5 figure 2. EVLALTAIR05T-5W electrical diagram & x ) 9 1 & 5 9 & ' & & 2 0 3 6 2 8 5 & ( ' 5 $ , 1 9 ' ' & 8 5 5 ( 1 7 & 2 1 7 5 2 / , 5 ( ) * 1 ' ) % = & ' 8 $ / 7 $ , 5 5 q ) & ' 6 7 7 + / . 5 . 5 q ) & & x ) & q ) 7 % 5 0 % 6 5 & q ) < & d s & 5 n 5 . 5 & x ) 9 / x + 5 : ' 6 7 3 6 / 8 ) & q ) & q ) 5 n & x ) / r z ( 6 5 ' % $ 7 9 $ * 1 ' $ & , 1 $ & , 1
revision history EVLALTAIR05T-5W 4/5 doc id 022723 rev 1 1 revision history table 1. document revision history date revision changes 26-jan-2012 1 initial release.
EVLALTAIR05T-5W doc id 022723 rev 1 5/5 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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