ROHM BD7J200EFJ-EVK-002 Switching Regulator Series Isolated Flyback DC-DC Converter Instruction Manual

BD7J200EFJ-EVK-002 Switching Regulator Series Isolated Flyback DC-DC Converter
Instruction Manual

＜High Voltage Safety Precautions＞
◇ Read all safety precautions before use

Please note that this document covers only the BD7J200EFJ-LB evaluation board (BD7J200EFJ-EVK-002) and its functions. For additional information, please refer to  the datasheet.

To ensure safe operation, please carefully read all precautions before handling the evaluation board

Depending on the configuration of the board and voltages used,
Potentially lethal voltages may be generated.
Therefore, please make sure to read and observe all safety precautions described in the red box below.

Before Use

1. Verify that the parts/components are not damaged or missing (i.e. due to the drops).

2. Check that there are no conductive foreign objects on the board.

3. Be careful when performing soldering on the module and/or evaluation board to ensure that solder splash does not occur.

4. Check that there is no condensation or water droplets on the circuit board.
   During Use

5. Be careful to not allow conductive objects to come into contact with the board.

6. Brief accidental contact or even bringing your hand close to the board may result in discharge and lead to severe injury or death.
   Therefore, DO NOT touch the board with your bare hands or bring them too close to the board.
   In addition, as mentioned above please exercise extreme caution when using conductive tools such as tweezers and screwdrivers.

7. If used under conditions beyond its rated voltage, it may cause defects such as short-circuiting or, depending on the circumstances, explosion or other permanent damages.

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.

10. Protect against electric shocks by wearing insulated gloves when handling.

This evaluation board is intended for use only in research and development facilities and should be handled only by qualified personnel familiar with all safety and operating procedures.
We recommend carrying out operations in a safe environment that includes the use of high voltage signage at all entrances, safety interlocks, and protective glasses.

Isolated Flyback DC/DC Converter BD7J200EFJ-LB EVK

BD7J200EFJ-EVK-002 (48V→12V, 1A)

BD7J200EFJ-EVK-002 delivers an output of 12 volts from an input of 48 volts using BD7J200EFJ-LB, Isolated Flyback DC/DC converter integrated circuit, with an output current rating of maximum 1A.

Performance specification
These are representative values, and it is not guaranteed against the characteristics.
VIN = 48V, VOUT = 12V, unless otherwise specified.

EVK

PCB size: 70mm×50mm×1.6mm

Operation Procedures

1. Necessary equipment
   (1) DC power supply capable of supplying 48V / 1A
   (2) Maximum 1A load
   (3) DC voltmeter

2. Connecting the equipment (as shown in Figure 3)
   (1) Preset DC power supply to 48V and turn it off.
   (2) Set the load to less than 1A and disable it.
   (3) Connect the power supply to VIN and GND pins with a pair of wires.
   (4) Connect the load to VOUT+ and VOUT- pins with a pair of wires.
   (5) Connect the voltmeter1 to VIN and GND pins to measure input voltage.
   (6) Connect the voltmeter2 to VOUT+ and VOUT- pins to measure the output voltage.
   (7) Turn on the power supply.
   (8) Check if the value of voltmeter2 is 12V.
   (9) Enable the load.

Circuit Diagram

VIN = 48V, VOUT = 12V

Bill of Materials

Table 1. Bill of Materials

No.| Value| Description| Size| Part Number / Series| Manufacturer
---|---|---|---|---|---
C1| 1pF| Capacitor, Chip, 100V, X7R| 3216| GRM31CR72A105KA01| MURATA
C2| 10pF| Capacitor, Chip, 100V, X7S| 3225| GRM32EC72A106KE05| MURATA
C3| –| Not installed| –| –| –
C4| –| Not installed| –| –| –
C5| 100pF| Capacitor, Chip, 100V, COG| 1608| GCM1885C2A1013A16| MURATA
C6| –| Not installed| –| –| –
C7| 24ffi| Capacitor, Chip, 25V, X7R| 3225| GRM32ER71E226KE15| MURATA
C8| 47pF| Capacitor, Chip, 16V, X6S| 3225| GRT32EC81C476KE13L| MURATA
C9| –| Not installed| –| –| –
C10| –| Not installed| –| –| –
C11| 100pF| Capacitor, Chip, 250V, COG| 2012| GRM21A5C2E101.1W01| MURATA
D1| 1A/90V| Diode, Schottky| 3516| RB160MM-90| ROHM
D2| Vz=36.0～| Diode, Zener, Vz=36.0-40.0V| 3516| KDZV36B| ROHM
D3| –| Not installed| –| –| –
D4| 3A/60V| Diode, Schottky| 3516| RBR3MM6OB| ROHM
D5| Vz=13.3V～| Diode, Zener, Vz=13.3-15.0V| 3516| KDZV13B| ROHM
R1| 1MΩ| Resistor, Chip, 1/16W, 1%| 1005| MCRO1MZPF1004| ROHM
R2| 68k5-Ω| Resistor, Chip, 1/16W, 1%| 1005| MCRO1MZPF6802| ROHM
R3| –| Short| –| –| –
R4| 2k5-Ω| Resistor, Chip, 1/16W, 1%| 1005| MCRO1MZPF2001| ROHM
R5| 78.71dΩ| Resistor, Chip, 1/16W, 1%| 1005| MCRO1MZPF7872| ROHM
R6| lkΩ| Resistor, Chip, 2W, 5%| 3264| [M10021)3102| ROHM
R7| –| Not installed| –| –| –
R8| –| Not installed| –| –| –
T1| 70pH| Transformer, Np:Ns=5:2, ±20%| 13.5×18.0x12.5mm| CEP1311F-4812121R| sumida
U1| BD7J200EFJ| I.C. BD7J200EFJ, HTSOP-J8| 4.90×6.00×1.00mm| BD7J200EFJ| ROHM

Board Layout

EVK PCB information

The following are layers of the BD7J200EFJ-EVK-002

Reference Application Data

C11 mounting method

Revision History

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 Products 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 ensure the accuracy of the information contained in this document. However, ROHM does not warrant 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 from 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 the prior consent of ROHM.

Thank you for your access to ROHM product information.
More detailed product information and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/

References

• ROHM Semiconductor - ROHM Co., Ltd.
• contactus

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