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Summary of Contents for Rohm BD7J200EFJ-LB EVK
- Page 1 Switching Regulator Series Isolated Flyback DC/DC Converter BD7J200EFJ-LB EVK BD7J200EFJ-EVK-002 (48V→12V, 1A)
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Page 2: High Voltage Safety Precautions
[8] Be sure to wear insulated gloves when handling is required during operation. After Use [9] The ROHM Evaluation Board contains the circuits which store the high voltage. Since it stores the charges even after the connected power circuits are cut, please discharge the electricity after using it, and please deal with it after confirming such electric discharge. - Page 3 Output Voltage 12.0 R4=2kΩ, R5=78.7kΩ Output Current Range 1000 Maximum Output Power：12W Operating Frequency Maximum Efficiency Io = 1000mA PCB size: 70mm×50mm×1.6mm Figure 1. BD7J200EFJ-EVK-002 Figure 2. BD7J200EFJ-EVK-002 Top View Bottom View © 2021 ROHM Co., Ltd. No. 63UG030E Rev.001 SEP.2021...
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Page 4: Operation Procedures
Connect the voltmeter2 to VOUT+ and VOUT- pins to measure output voltage. Turn on the power supply. Check if the value of voltmeter2 is 12V. Enable the load. DC Voltmeter 1 DC Voltmeter 2 Load DC Power Figure 3. Connection Diagram © 2021 ROHM Co., Ltd. No. 63UG030E Rev.001 SEP.2021... -
Page 5: Circuit Diagram
Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF7872 ROHM 1kΩ Resistor, Chip, 2W, 5% 3264 LTR100JZPJ102 ROHM Notinstalled Notinstalled 70μH Transformer, Np:Ns=5:2, ±20% 13.5×18.0×12.5mm CEP1311F-4812121R sumida BD7J200EFJ I.C. BD7J200EFJ, HTSOP-J8 4.90×6.00×1.00mm BD7J200EFJ ROHM © 2021 ROHM Co., Ltd. No. 63UG030E Rev.001 SEP.2021... -
Page 6: Board Layout
(Top View) (Top View) Figure 8. Middle Layer1 layout Figure 7. Top Layer layout (Top View) (Top View) Figure 10. Bottom Layer Layout Figure 9. Middle Layer2 Layout (Top View) (Top View) © 2021 ROHM Co., Ltd. No. 63UG030E Rev.001 SEP.2021... - Page 7 BD7J200EFJ-EVK-002 User’s Guide Reference Application Data Figure 11. Power Conversion Efficiency vs Output Current Figure 12. Load Regulation © 2021 ROHM Co., Ltd. No. 63UG030E Rev.001 SEP.2021...
- Page 8 ※There is no land pattern for C11. Figure 13. Top land pattern (Top View) C11 mounting position C11 is mounted on the lead terminals of U1_6pin (PGND) and U1_7pin (SW). Figure 14. C11 mounting position © 2021 ROHM Co., Ltd. No. 63UG030E Rev.001 SEP.2021...
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Page 9: Revision History
BD7J200EFJ-EVK-002 User’s Guide Revision History Revision Date Description Number 9. Sep. 2021 Initial release © 2021 ROHM Co., Ltd. No. 63UG030E Rev.001 SEP.2021... - Page 10 Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM or any other parties. ROHM shall have no responsibility whatsoever for any dispute arising out of the use of such technical information.
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