Page 1
© 2017 ROHM Co., Ltd.
No. 60AP001E Rev.001
2017.4
© 2017 ROHM Co., Ltd.
No. 60UG032E Rev.002
NOV.2018
User’s Guide
Parameter
Min
Typ
Max
Units
Conditions
Input Voltage
24.0 V
Output Voltage
5.0 V
R4=3.9kΩ, R5=80.6kΩ
Output Current Range
13.8 1000
mA
Maximum Output Power：5W
Operating Frequency
400 kHz
Maximum Efficiency
77.5 %
IO = 1000mA
Switching Regulator Series
Isolated Flyback DC/DC Converter
BD7F100HFN-LB Evaluation Board
BD7F100HFN-EVK-002 (24V→5V, 1A)
BD7F100HFN-EVK-002 Evaluation board delivers an output 5 volts from an input 24 volts using BD7F100HFN-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 = 24V, V
= 5V, Unless otherwise specified.
OUT
Evaluation Board
PCB size: 70mm×50mm×1.6mm
Figure 1. BD7F100HFN-EVK-002 Evaluation Board Figure 2. BD7F100HFN-EVK-002 Evaluation Board
Top View Bottom View
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User’s Guide
BD7F100HFN-EVK-002
© 2017 ROHM Co., Ltd.
No. 60UG032E Rev.002
NOV.2018
DC Voltmeter 1
DC Voltmeter 2
-
+
-
+
-
DC Power
+
-
Load
+
V
V
Operation Procedures
1. Necessary equipments
(1) DC power-supply of 24V / 0.5A
(2) Maximum 1A load
(3) DC voltmeter
2. Connecting the equipments
(1) DC power-supply presets to 24V and then the power output turns off.
(2) The maximum load should be set at 1A 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.
Figure 3. Connection Diagram
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User’s Guide
BD7F100HFN-EVK-002
© 2017 ROHM Co., Ltd.
No. 60UG032E Rev.002
NOV.2018
C6
C5
R6
D3
C7 R7 D4
GND
R1
R2
VOUT-
VOUT+
SDX/EN
C8
CN1
+
-
-
CN2
+
T1
4,5 1,2
6,7 9,10
U1
AGND
1
SDX/EN
2
COMP
3
REF
4
FIN
9
VIN
8
SW
7
PGND
6
FB
5
D1
D2
C3
C2C1
R4R3C4
R5
VIN
No. Value Description Size Part Number / Series Manufactuer
C1 1μF Capacitor, Chip, 50V, X7R 2012 GRM21BR71H105KA12L MURATA
C2 4.7μF Capacitor, Chip, 50V, X7R 3216 GRM31CR71H475KA12L MURATA
C3 - Notinstalled - - C4 - Notinstalled - - C5 1000pF Capacitor, Chip, 50V, CH 1608 GRM1882C1H102JA01 MURATA
C6 - Notinstalled - - C7 47μF Capacitor, Chip, 10V, X7R 3225 GRM32ER71A476KE15 MURATA
C8 - Notinstalled - - D1 RB160MM-40 Diode, Schottky 3516 RB160MM-40 ROHM
D2 TFZ20B Diode, Zener, Vz=18.63～19.59V 2514 TFZ20B ROHM
D3 RB160MM-40 Diode, Schottky 3516 RB160MM-40 ROHM
D4 - Notinstalled - - R1 1MΩ Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF1004 ROHM
R2 120kΩ Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF1203 ROHM
R3 - Short - - R4 3.9kΩ Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF3901 ROHM
R5 80.6kΩ Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF8062 ROHM
R6 1kΩ Resistor, Chip, 2/5W, 1% 2012 ESR10EZPF1001 ROHM
R7 330Ω Resistor, Chip, 1/10W, 1% 1608 MCR03EZPFX3300 ROHM
T1 63μH Transformer, Np:Ns=3:1, ±20% 13.5 x 20.0 x 12.5mm CEP1311D-2405051R sumida
U1 BD7F100HFN I.C. BD7F100HFN HSON8 BD7F100HFN ROHM
Circuit Diagram
VIN = 24V, V
OUT
= 5V
Figure 4. BD7F100HFN-EVK-002 Circuit Diagram
Bill of Materials
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User’s Guide
BD7F100HFN-EVK-002
© 2017 ROHM Co., Ltd.
No. 60UG032E Rev.002
NOV.2018
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) (Top View)
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User’s Guide
BD7F100HFN-EVK-002
© 2017 ROHM Co., Ltd.
No. 60UG032E Rev.002
NOV.2018
0
10
20
30
40
50
60
70
80
90
0.0 0.2 0.4 0.6 0.8 1.0
Efficiency[%]
IOUT[A]
4.5
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
0.0 0.2 0.4 0.6 0.8 1.0
VOUT[V]
IOUT[A]
Reference Application Data
VIN = 24V, V
OUT
= 5V
Figure 11. Efficiency vs Load Current
Figure 12. Load Regulation
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Notes
The information contained herein is subject to change without notice.
1)
Before you use our Products, please contact our sales representative
2)
tions :
Although ROHM is continuously working to improve product reliability and quality, semicon-
3)
ductors 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.
Examples of application circuits, circuit constants and any other information contained herein are
4)
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.
The technical information specified herein is intended only to show the typical functions of and
5)
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.
The Products specified in this document are not designed to be radiation tolerant.
6)
For use of our Products in applications requiring a high degree of reliability (as exemplified
7)
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.
Do not use our Products in applications requiring extremely high reliability, such as aerospace
8)
equipment, nuclear power control systems, and submarine repeaters.
ROHM shall have no responsibility for any damages or injury arising from non-compliance with
9)
the recommended usage conditions and specifications contained herein.
ROHM has used reasonable care to ensurH the accuracy of the information contained in this
10)
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.
Please use the Products in accordance with any applicable environmental laws and regulations,
11)
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.
When providing our Products and technologies contained in this document to other countries,
12)
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.
This document, in part or in whole, may not be reprinted or reproduced without prior consent of
13)
ROHM.
and verify the latest specifica-
Notice
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652+0&R/WG$OOULJKWVUHVHUYHG
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
5
%
Page 7
Notice
www.rohm.com
© 2017 ROHM Co., Ltd. All rights reserved.
HVA01E
<High Voltage Safety Precautions>
ٶ
Read all safety precautions before use
Please note that this document covers only the evaluation board
( ) 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-circuit 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 by handled only by qualified personnel familiar with all safety and
operating procedures.
We recommend carrying out operation in a safe environment that includes the use of
high voltage signage at all entrances, safety interlocks, and protective glasses.
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BD7F100HFNEVK002
BD7F100HFNLB
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