User's Guide Switching Regulator Series Isolated Flyback DC/DC Converter BD7F100EFJ-LB Evaluation Board BD7F100EFJ-EVK-003 (5V5V, 0.2A) BD7F100EFJ-EVK-003 Evaluation board delivers an output 5 volts from an input 5 volts using BD7F100EFJ-LB, Isolated Flyback DC/DC converter integrated circuit, with output current rating of maximum 1A. Performance specification These are representative values, and it is not a guaranteed against the characteristics. VIN = 5V, VOUT = 5V, Unless otherwise specified. Parameter Min Typ Max Units Input Voltage 5.0 V Output Voltage 5.0 V Output Current Range 3.75 200 Conditions R4=3.9k, R5=13.3k mA Operating Frequency 400 kHz Maximum Efficiency 79.4 % Maximum Output Power1W IO = 100mA Evaluation Board PCB size: 70mmx50mmx1.6mm Figure 1. BD7F100EFJ-EVK-003 Evaluation Board Figure 2. BD7F100EFJ-EVK-003 Evaluation Board Top View (c) 2017 ROHM Co., Ltd. Bottom View 1/5 No. 60UG030E Rev.002 NOV.2018 BD7F100EFJ-EVK-003 User's Guide Operation Procedures 1. Necessary equipments (1) DC power-supply of 5V/0.5A (2) Maximum 200mA load (3) DC voltmeter 2. Connecting the equipments (1) DC power-supply presets to 5V and then the power output turns off. (2) The maximum load should be set at 200mA and over it will be disabled. (3) Connect positive-terminal of power-supply to VIN terminal and negative-terminal to GND terminal with a pair of wires. (4) Connect load's positive-terminal to VOUT+ terminal and negative-terminal to VOUT-terminal with a pair of wires. (5) Connect positive-terminal of DC voltmeter 1 to VIN and negative-terminal to GND for input-voltage measurement. (6) Connect positive-terminal of DC voltmeter 2 to VOUT+ and negative-terminal to VOUT- for output-voltage measurement. (7) DC power-supply output is turned ON. (8) Check DC voltmeter 2 displays 5V. (9) The load is enabled. + DC Voltmeter 1 V V DC Voltmeter 2 + + Load DC Power - + Figure 3. Connection Diagram (c) 2017 ROHM Co., Ltd. 2/5 No. 60UG030E Rev.002 NOV.2018 BD7F100EFJ-EVK-003 User's Guide Circuit Diagram VIN = 5V, VOUT = 5V SDX/EN D3 VOUT+ 3,4 R1 + T1 7 VIN D2 CN1 C3 C2 C1 C5 + - CN2 R2 C7 R7 D4 - 3 VIN SDX/EN SW COMP PGND REF FB 7 VOUT- 6 R5 5 C8 9 4 AGND FIN 2 D1 8 1,2 R6 U1 1 6 GND C4 R3 R4 C6 Figure 4. BD7F100EFJ-EVK-003 Circuit Diagram Bill of Materials No. Value Description Size Part Number / Series Manufactuer C1 1F Capacitor, Chip, 50V, X7R 2012 GRM21BR71H105KA12L MURATA C2 4.7F Capacitor, Chip, 50V, X7R 3216 GRM31CR71H475KA12L MURATA C3 - Notinstalled - - - C4 - Notinstalled - - - C5 1000pF Capacitor, Chip, 50V, CH 1005 GRM1552C1H102JA01 MURATA C6 - Notinstalled - - - C7 22F Capacitor, Chip, 25V, X7R 3225 GRM32ER71E226KE15L MURATA C8 - Notinstalled - - - D1 1SS400SM Diode 1608 1SS400SM ROHM D2 KDZ3.6B Diode, Zener, Vz=3.604.00V 3516 KDZ3.6B ROHM D3 RB160MM-40 Diode, Schottky 3516 RB160MM-40 ROHM D4 - Notinstalled - - - R1 510k Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF5103 ROHM R2 680k Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF6803 ROHM R3 - Short - - - R4 3.9k Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF3901 ROHM R5 13.3k Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF1332 ROHM R6 200 Resistor, Chip, 1/8W, 1% 2012 MCR10EZPF2000 ROHM R7 1k Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF1001 ROHM T1 10H Transformer, Np:Ns=1:2, 20% 10.0 x 10.0 x 11.5mm CEP911B-0505051R sumida U1 BD7F100EFJ I.C. BD7F100EFJ HTSOP-J8 BD7F100EFJ ROHM (c) 2017 ROHM Co., Ltd. 3/5 No. 60UG030E Rev.002 NOV.2018 BD7F100EFJ-EVK-003 User's Guide Layout Figure 5. Top Silk Screen and Layout Figure 6 . Bottom Silk Screen and Layout (Top View) (Top View) Figure 7. Top Side Layout Figure 8. Middle Layer1 Layout (Top View) (Top View) Figure 9. Middle Layer2 Layout Figure 10. Bottom Side Layer Layout (Top View) (c) 2017 ROHM Co., Ltd. (Top View) 4/5 No. 60UG030E Rev.002 NOV.2018 BD7F100EFJ-EVK-003 User's Guide Reference Application Data VIN = 5V, VOUT = 5V 90 80 70 Efficiency[%] 60 50 40 30 20 10 0 0.00 0.05 0.10 0.15 0.20 IOUT[A] Figure 11. Efficiency vs Load Current 5.5 5.4 5.3 VOUT[V] 5.2 5.1 5.0 4.9 4.8 4.7 4.6 4.5 0.00 0.05 0.10 0.15 0.20 IOUT[A] Figure 12. Load Regulation (c) 2017 ROHM Co., Ltd. 5/5 No. 60UG030E Rev.002 NOV.2018 Notice Notes 1) The information contained herein is subject to change without notice. 2) Before you use our Products, please contact our sales representative and verify the latest specifications : 3) Although ROHM is continuously working to improve product reliability and quality, semiconductors can break down and malfunction due to various factors. Therefore, in order to prevent personal injury or fire arising from failure, please take safety measures such as complying with the derating characteristics, implementing redundant and fire prevention designs, and utilizing backups and fail-safe procedures. ROHM shall have no responsibility for any damages arising out of the use of our Poducts beyond the rating specified by ROHM. 4) Examples of application circuits, circuit constants and any other information contained herein are provided only to illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. 5) The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the 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. 6) The Products specified in this document are not designed to be radiation tolerant. 7) For use of our Products in applications requiring a high degree of reliability (as exemplified below), please contact and consult with a ROHM representative : transportation equipment (i.e. cars, ships, trains), primary communication equipment, traffic lights, fire/crime prevention, safety equipment, medical systems, servers, solar cells, and power transmission systems. 8) Do not use our Products in applications requiring extremely high reliability, such as aerospace equipment, nuclear power control systems, and submarine repeaters. 9) ROHM shall have no responsibility for any damages or injury arising from non-compliance with the recommended usage conditions and specifications contained herein. 10) ROHM has used reasonable care to ensurH the accuracy of the information contained in this document. However, ROHM does not warrants that such information is error-free, and ROHM shall have no responsibility for any damages arising from any inaccuracy or misprint of such information. 11) Please use the Products in accordance with any applicable environmental laws and regulations, such as the RoHS Directive. For more details, including RoHS compatibility, please contact a ROHM sales office. ROHM shall have no responsibility for any damages or losses resulting non-compliance with any applicable laws or regulations. 12) When providing our Products and technologies contained in this document to other countries, you must abide by the procedures and provisions stipulated in all applicable export laws and regulations, including without limitation the US Export Administration Regulations and the Foreign Exchange and Foreign Trade Act. 13) This document, in part or in whole, may not be reprinted or reproduced without prior consent of ROHM. 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