data brief for further information contact your local stmicroelectronics sales office. december 2007 rev 1 1/4 4 STEVAL-ISA029V1 compact power supply for dvd/ set top box evaluation board with three v out (-30 v, +3.3 v, +12 v) features input voltage range 85 v ac ? 300 v ac v out1 = 12 v (5%) i out1 = 1 a v out2 = 3.3 v (2%) i out2 = 100 ma v out3 = -24 v (10%) i out3 = 40 ma safety en60950 compliant emi - conducted en55022-b compliant description the STEVAL-ISA029V1 evaluation board is an isolated triple-output flyback converter, suitable for wide-range input voltage operation. the converter is based on the smart power viper53-e, which integrates, in the same package, an enhanced current-mode pwm controller with a high-voltage mdmesh? power mosfet. the switching frequency is set to 60 khz by means of an external rc network connected to a dedicated pin on the ic. the closed loop regulation is performed on the 12 v output using an optocoupler, which drives the comp pin of the viper. the 3.3 v output is post regulated using a non-integrated low drop linear voltage regulator to achieve the required accuracy. the negative 24 v output is achieved by means of a discrete linear voltage regulator, made up of a zener diode, a resistor and a pnp transistor. STEVAL-ISA029V1 www.st.com
board schematic STEVAL-ISA029V1 2/4 1 board schematic figure 1. schematic + 1 2 v - 2 4 v + 3 . 3 v c o m e t r a n s i s t o r e d i p o t e n z a : b d 1 4 0 b s s 4 4 c o u t 3 1 5 0 0 u c o u t 3 1 5 0 0 u t 1 t r a n s f o r m e r t 1 t r a n s f o r m e r 1 2 6 5 7 8 4 3 c o u t 2 3 3 0 u c o u t 2 3 3 0 u u 5 p c 8 1 7 b u 5 p c 8 1 7 b c 7 1 0 0 n c 7 1 0 0 n r 5 1 k r 5 1 k c 8 4 . 7 n c 8 4 . 7 n r 9 4 7 k r 9 4 7 k l 1 1 0 m h l 1 1 0 m h 1 4 2 3 c 1 1 1 0 0 n c 1 1 1 0 0 n b d 1 4 0 q 1 b d 1 4 0 q 1 r 3 5 . 6 k r 3 5 . 6 k j 2 c o n 7 j 2 c o n 7 1 2 3 4 5 6 7 c 4 4 . 7 n 4 0 0 v c 4 4 . 7 n 4 0 0 v c 1 0 6 8 n c 1 0 6 8 n c 6 2 2 u c 6 2 2 u u 1 l k 1 1 2 m 3 3 t r u 1 l k 1 1 2 m 3 3 t r 1 2 3 4 5 c 2 1 0 0 n 4 0 0 v c 2 1 0 0 n 4 0 0 v r 6 1 k r 6 1 k c 9 1 0 n c 9 1 0 n c 5 1 0 0 n c 5 1 0 0 n d 7 s t p s 1 1 5 0 d 7 s t p s 1 1 5 0 c 1 2 2 . 2 n c 1 2 2 . 2 n r 1 0 4 . 7 k r 1 0 4 . 7 k j 1 c o n 2 j 1 c o n 2 1 2 c 1 1 0 0 n 4 0 0 v c 1 1 0 0 n 4 0 0 v d 6 s t p s 2 h 1 0 0 d 6 s t p s 2 h 1 0 0 c 1 6 1 0 0 n c 1 6 1 0 0 n r 1 3 4 7 0 r 1 3 4 7 0 r 2 1 0 r 2 1 0 d 1 s t t h 1 0 2 d 1 s t t h 1 0 2 t r t 1 5 0 t r t 1 5 0 1 2 r 7 1 8 k r 7 1 8 k u 2 v i p e r 5 3 u 2 v i p e r 5 3 s o u r c e 3 d r a i n 5 c o m p 1 n . c . 6 v d d 7 o s c 2 s o u r c e 4 t o v l 8 c 3 c 3 4 7 u 4 0 0 v c 1 3 n . m . c 1 3 n . m . r 1 5 1 8 0 1 w r 1 5 1 8 0 1 w d 8 z e n e r 2 4 v d 8 z e n e r 2 4 v d 9 s t t h 1 1 0 d 9 s t t h 1 1 0 r 1 2 3 3 0 r 1 2 3 3 0 r 8 2 . 2 k r 8 2 . 2 k f 1 f u s e f 1 f u s e - + d 2 d i o d e b r i d g e - + d 2 d i o d e b r i d g e 1 3 2 4 c o u t 1 2 2 u c o u t 1 2 2 u r 1 1 8 2 0 r 1 1 8 2 0 c 1 4 1 0 0 n - n m c 1 4 1 0 0 n - n m c 1 7 2 . 2 n 1 k v c 1 7 2 . 2 n 1 k v d 4 s t t h 1 0 2 d 4 s t t h 1 0 2 d 5 s t t h 1 1 0 d 5 s t t h 1 1 0 r 4 1 k r 4 1 k u 4 t l 4 3 1 u 4 t l 4 3 1 2 3 1 d 3 t r a n s i l - n . m . d 3 t r a n s i l - n . m . r 1 1 5 k 2 w r 1 1 5 k 2 w c 1 5 4 . 7 u c 1 5 4 . 7 u
STEVAL-ISA029V1 revision history 3/4 2 revision history table 1. document revision history date revision changes 06-dec-2007 1 initial release.
STEVAL-ISA029V1 4/4 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 parti cular 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 milita ry, 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, an y 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. ? 2007 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 - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com
|
