STEVAL-ISA017V1 Power supply for STB based on L6565 (US-110 V) Data Brief Features Switch mode Quasi-Resonant Flyback Power Supply Input: 88 to 138 Vac (US version) Switching frequency: 50/60 Hz Output1: 12 V @ 500 mA delivering 6 W with 10% of stability Output2: 8 V @ 40 mA delivering 0.32 W with 15% of stability Output3: 5 V @ 1 A delivering 5 W with 5% of stability Output4: 3.3 V @ 450 mA delivering 1.485 W with 2% of stability ST components Output5: 1.23 V @ 1 A delivering 5 W with 5% of stability STTH108 High Voltage Ultrafast Rectifier, 1 A, 800 V Output6: 2.5 V @ 0.7A delivering 1.75 W with 2% of stability SMBYW02-200 High Efficiency Fast Recovery Rectifier Diode, 2 A, 200 V STPS5L40 Power Schottky Rectifier, 5 A, 40 V STPS5L25B low drop power Schottky Rectifier, 3 A, 40 V STPS340 Power Schottky Rectifier, 3 A, 40 V L6565 Quasi Resonant SMPS controller L5973D step down switching regulator up to 2.5 A LD29080DT25, 800 mA fixed and adjustable output, very low dropout voltage regulator STD5NK50Z, N-channel zener protected SuperMESH Power MOSFETs, 500 V, 1.22 Ohm, 4.4 A STEVAL-ISA017V1 General description This document describes a reference design of a 17 W Switch Mode Power Supply dedicated to Set-Top Box applications. The board accepts US input voltages (90 to 265 Vrms) and delivers up to 6 W outputs. It is based on the L6565 quasi resonant SMPS controller, working in variable frequency mode. The Quasi-resonant operation and the high flexibility of the L6565 make it a very suitable device, able to satisfy all the requirements with only few external components. March 2007 Rev 3 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 110Vac R1 16 Ohm - D1 S1ZB80 + C1 22F 200V 1 3 I1A 4 2 C2 47F 200V 2x47mH I1B 4 IC2A K1010 3B 3 R10 1.5K C5 10nF R9 1K R4 10K R3 1.5M R2 0 ohm R6 270K R5 0 ohm 1 2 3 4 L6565 INV VCC COMP GD VFF GND CS ZCD IC1 C3 47F 25V 8 7 6 5 R7 150K D3 R11 10 ohm R13 47K BAV21W R8 1K C4 10nF 200V 4 5 TR1B MAR5145 R12 33 ohm UF108G D2 TR1A MAR5145 1 2 C7 1nF KX R14 1.1 ohm T1 STD5NM50 C6 1nF KX TR1E MAR5145 TR1D MAR5145 TR1C MAR5145 6 8 8 7 7 9 C15 470F 16V D7 STPS5L25B C10 470F 16V D6 STPS5L40 C16 470F 16V C11 470F 16V C8 470F 16V D4 SMBYW02-200 C20 220pF 3.3V C17 470F 16V C12 470F 16V 1 1 Vin IC4 VCC VREF SYNC COMP GND 2 IC3 Vout 1 3 FB OUT L5973D TS2431ILT I3 1H R17 220 Ohm IC5 LD29080DT25 4.7K R21 I2 1H IC2B K1010 3B C21 100nF 8 6 2 4 2 2/4 3 R23 47K 5 1 2 C18 47nF D5 9.1V R15 560 ohm R22 2.2K I4 10H R19 6.98K 1% C13 N.M. 2.5V C19 470F 16V 3.3V C14 470F 16V 5V C9 470F 16V C22 470F D8 STPS340U 16V R20 10K 1% R18 18.7K 1% T2 BC847 R16 56 ohm 2W 8V C24 10F 25V 470F 16V C23 1.23V 12V 3 10 9 8 7 6 5 4 12 11 2 1 2.5V/0.7A 1.23V/1.7A GND 3.3V/0.45A 5V/1A 8V/40mA 12V/0.5A Figure 1. INH GND 1 3 7 F1 1A T Board schematic STEVAL-ISA017V1 Board schematic Board schematic STEVAL-ISA017V1 2 Revision history Revision history Table 1. Revision history Date Revision Changes 09-Oct-2006 1 First issue 06-Feb-2007 2 Typo mistake on page 1 09-Mar-2007 3 Minor text change 3/4 STEVAL-ISA017V1 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. (c) 2007 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 - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 4/4