STEVAL-ISB001V1

STEVAL-ISB001V1 Cell phone battery charger demonstration board based on the STD1LNK60Z-1 Data brief Features ■ Vac = 85 to 265 V ■ Output voltage: 4.7 V ■ Output power: 1.9 W ■ RoHS compliant Description The STEVAL-ISB001V1 demonstration board is a ringing choke converter (RCC)-based, step-bystep cell phone battery charger. The RCC is essential to the self-oscillating flyback converter, and operates within the discontinuous conduction mode (DCM) and continuous conduction mode (CCM) boundaries without noticeable reverse recovery of the output rectifying diodes. STEVAL-ISB001V1 RCC control is achieved by using discrete components to control the peak current mode, so the overall RCC cost is relatively low compared to the conventional pulse width modulation (PWM) IC flyback converter. As a result, RCC is widely used for low-power applications in industry and home appliances as a simple and cost-effective solution. December 2010 Doc ID 18140 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Circuit schematic STEVAL-ISB001V1 1 Circuit schematic Figure 1. RCC control circuit components schematic VDC +5V T R2 R3 C13 U1A 1N5819 R21 D5 R15 C10 + STD1LNK60Z R9 R18 R22 R11 R16 R11a Q2 C6 C11 TL431 3904 Q3 C5 R10 Q1 R19 R12 R7 U1B 3904 + C4 C7 AI11827 Figure 2. D1 1N4007 R1 10/1W D3 1N4007 STD1LNK60Z-based RCC schematic D2 1mH C3 1N4007 150K/1W C1 4.7µF/400V R3 +5V D7 U1A 1N5819 222/1KV 2 P817 C8 + 330µ/16V D5 STTH108 C2 4.7µF.400V T1 16 Vbs R2 L1 D4 R4 5 3 R18 910 C5 1N4007 R6 5.1 Q1 R11 STD1LNK60-1 C6 R7 R13 4 Q3 3904 R12 1K R9 U1B D6 1N4148 R8 + C4 100µ/16V C7 R20 2.7 0.1u/60V U2 TL431 C9 + 47µ/16V R22 1K R16 3.0 R17 2.2 CY 102/Y2 Vbs 2/4 C11 R14 Z1 Q2 3904 R19 150 C10 102/60V R10 R5 R21 910 R15 75 Doc ID 18140 Rev 1 AI11828 STEVAL-ISB001V1 2 Revision history Revision history Table 1. Document revision history Date Revision 15-Dec-2010 1 Changes Initial release. Doc ID 18140 Rev 1 3/4 STEVAL-ISB001V1 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 18140 Rev 1