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| RD9 (R) TM TinySwitch Flyback Prototyping Board User Configurable Input and Output Voltages Product Highlights Unpopulated Prototyping Board * Complete layout for construction of TinySwitch flyback supply * Convenient prototyping area on secondary side of board * Single-sided construction * RD9 boards can be combined for rapid prototyping with RD8 (available separately) (R) INTEGRATIONS, INC. TinySwitch RD9 Rev. B POWER 1.31 in. (33.2 mm) 3.86 in. (97.9 mm) PI-2313-0092398 Figure 1. RD9 Board Overall Physical Dimensions. Description R1 D1 L D3 C2 D4 N U1 C4 C1 T1 The RD9 is a special printed circuit board (Figure 1) designed for rapid prototyping of TinySwitch-based flyback power supplies in the 1-3 W range. Component positions and an optimized layout are provided for a complete single output power supply as shown in Figure 2. Component size and placement are identical to evaluation board RD8. The board is designed to accommodate a transformer using an EE16 core with a 10 pin bobbin (Ying Chin YC-1607 or equivalent*). In addition to the power supply circuitry, the RD9 also provides a prototyping area on the secondary side of the board for circuitry such as additional outputs or voltage and current regulators. Some typical application circuits that can be constructed using the RD9 printed circuit board can be found in the TinySwitch and RD8 data sheets, and Design Ideas DI-4 through DI-8. For extremely rapid prototyping, the RD8 TinySwitch evaluation board and the RD9 prototyping board are perforated between the primary and secondary circuit areas, so that the primary half of the RD8 can be separated and combined with the secondary half of the RD9. EE16_10P2 D2 L1 C6 R2 R4 C3 C5 L2 JMP1 + C7 INTEGRATIONS, INC. TinySwitch RD9 Rev. B POWER (R) U2 VR1 [Not Actual Size] PI-2319-100898 Figure 2. PC Board Layout of the RD9. * Available from B&B Products Corp +1 (520) 884-4818 September 1998 RD9 L1 3 T1 D5 8-10 L2 Bead Output C6 C7 D1 D2 R2 D 4 5-7 RTN TinySwitch EN BP R1 R4 AC Input Fusible C1 C2 U1 S U2 C3 D3 D4 C4 VR1 C5 PI-2315-092298 Figure 3. Schematic Diagram of a Typical RD9 Circuit. Using RD8 and RD9 Together A complete RD9 board is shown in Figure 4, and an RD8 board in Figure 5. To combine the secondary side of RD9 with the primary side of RD8, follow the instructions below: Figure 4. RD9 Printed Circuit Board. Figure 5. RD8 Printed Circuit Board. 2 A 9/98 RD9 * Break the RD9 board along the perforations to separate the primary and secondary halves. The secondary half of the board contains the prototyping area (Figure 6). Figure 6. Prepared RD9 Board. * Prepare the RD8 board by removing T1, C5, and U2. Set these aside for reuse. Break the board along the perforations to separate the primary and secondary circuitry. The board should then look as shown in Figure 7. Figure 7. Prepared RD8 Board. * Fit the primary half of RD8 and the secondary half of RD9 together, using T1, C5, and U2 removed from the RD8 board to bridge between the two board halves (Figure 8). A different transformer can be substituted for T1. Use the cores and bobbins suggested in the text for best mechanical fit. Figure 8. Combined RD8 and RD9. A 9/98 3 RD9 For the latest updates, visit our website: www.powerint.com Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described herein, nor does it convey any license under its patent rights or the rights of others. PI Logo and TOPSwitch are registered trademarks of Power Integrations, Inc. (c)Copyright 1998, Power Integrations, Inc. 477 N. Mathilda Avenue, Sunnyvale, CA 94086 WORLD HEADQUARTERS NORTH AMERICA - WEST Power Integrations, Inc. 477 N. Mathilda Avenue Sunnyvale, CA 94086 USA Main: +1*408*523*9200 Customer Service: Phone: +1*408*523*9265 Fax: +1*408*523*9365 KOREA Power Integrations International Holdings, Inc. Rm# 402, Handuk Building, 649-4 Yeoksam-Dong, Kangnam-Gu, Seoul, Korea Phone: +82*2*568*7520 Fax: +82*2*568*7474 NORTH AMERICA - EAST & SOUTH AMERICA Power Integrations, Inc. Eastern Area Sales Office 1343 Canton Road, Suite C1 Marietta, GA 30066 USA Phone: +1*770*424*5152 Fax: +1*770*424*6567 EUROPE & AFRICA Power Integrations (Europe) Ltd. Mountbatten House Fair Acres Windsor Berkshire SL4 4LE, United Kingdom Phone: +44*1753*622*208 Fax: +44*1753*622*209 TAIWAN Power Integrations International Holdings, Inc. 2F, #508, Chung Hsiao E. Rd., Sec. 5, Taipei 105, Taiwan Phone: +886*2*2727*1221 Fax: +886*2*2727*1223 JAPAN Power Integrations, K.K. Keihin-Tatemono 1st Bldg. 12-20 Shin-Yokohama 2-Chome, Kohoku-ku, Yokohama-shi, Kanagawa 222, Japan Phone: +81*45*471*1021 Fax: +81*45*471*3717 INDIA (Technical Support) Innovatech #1, 8th Main Road Vasanthnagar Bangalore 560052, India Phone: +91*80*226*6023 Fax: +91*80*228*2191 APPLICATIONS HOTLINE World Wide +1*408*523*9260 APPLICATIONS FAX World Wide +1*408*523*9361 4 A 9/98 |
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