Page 1
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2017
User’s Guide
Switching Regulator Series
Isolated Flyback DC/DC Converter
BD7F100EFJ-LB Evaluation Board
BD7F100EFJ-EVK-002 (24V→±15V, 0.165A)
BD7F100EFJ-EVK-002 Evaluation board delivers outputs 15volts and -15 volts from an input 24 volts using BD7F100EFJ-LB, Isolated Flyback
DC/DC converter integrated circuit, with output current rating of maximum 0.165A.
Performance specification
These are representative values, and it is not a guaranteed against the characteristics.
VIN = 24V, V
OUT1
= 15V, V
= -15V, Unless otherwise specified.
OUT2
Parameter Min Typ Max Units Conditions
Input Voltage 24.0 V
Output Voltage 1 15.0 V R4=3.9kΩ, R5=76.8kΩ
Output Voltage 2 -15.0 V R4=3.9kΩ, R5=76.8kΩ
Output Current 1 Range 3.2 165 mA
Maximum Output Power：5W
Output Current 2 Range 3.2 165 mA
Operating Frequency 400 kHz
Maximum Efficiency 81.7 % IO = 165mA
Evaluation Board
PCB size: 70mm×50mm×1.6mm
Figure 1. BD7F100EFJ-EVK-002 Evaluation Board Figure 2. BD7F100EFJ-EVK-002 Evaluation Board
Top View Bottom View
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V
User’s Guide
Operation Procedures
1. Necessary equipments
(1) DC power-supply of 24V/0.5A
(2) Maximum 0.165A load per output
(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 165mA 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 positive-terminal of load 1 to VOUT+ terminal and negative-terminal to COM terminal with a pair of wires.
(5) Connect positive-terminal of load 2 to COM terminal and negative-terminal to VOUT- terminal with a pair of wires.
(6) Connect positive-terminal of DC voltmeter 1 to VIN and negative-terminal to GND for input-voltage measurement.
(7) Connect positive-terminal of DC voltmeter 2 to VOUT+ and negative-terminal to COM for output-voltage measurement.
(8) Connect positive-terminal of DC voltmeter 3 to VOUT- and negative-terminal to COM for output-voltage measurement.
(9) DC power-supply output is turned ON.
(10) Check DC voltmeter 2 displays 15V.
(11) Check DC voltmeter 3 displays -15V.
(12) The load is enabled.
DC Voltmeter 1
DC Power
V
+
-
+
-
+
DC Voltmeter 2
-
-
V
DC Voltmeter 3
+
Load 1
Load 2
© 2017 ROHM Co., Ltd.
Figure 3. Connection Diagram
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Circuit Diagram
VIN = 24V, V
SDX/EN
VIN
GND
CN1
OUT1
+
-
= 15V, V
R1
R2
= -15V
OUT2
T1
1,2
C3
U1
1
AGND
2
SDX/EN
3
COMP
4
REF
R4C6R3C4
FIN
9
VIN
SW
PGND
8
7
6
5
FB
C2C1
R5
C5
D2
4,5
R6
D1
C11
D3
10
7
9
D5
6
User’s Guide
C7 R7
C8
C9 R8
C10
VOUT+
D4
COM
COM
D6
VOUT-
Figure 4. BD7F100EFJ-EVK-002 Circuit Diagram
Bill of Materials
No. Va lue Description Size Part Number / Series Manufactue r
C1 1μF Capacitor, Chip, 50V, X7R 2012 GRM21BR71H105KA12 MURATA
C2 4.7μF Capacitor, Chip, 50V, X7R 3216 GRM31CR71H475KA12 MURATA
C3 - Notinstalled - - -
C4 - Notinstalled - - -
C5 4700pF Capacitor, Chip, 50V, R 1005 GRM155R11H472KA01 MURATA
C6 - Notinstalled - - -
C7 10μF Capacitor, Chip, 25V, X7R 3225 GRM32DR71E106KA12 MURATA
C8 - Notinstalled - - -
C9 10μF Capacitor, Chip, 25V, X7R 3225 GRM32DR71E106KA12 MURATA
C10 - Notinstalled - - -
C11 - Notinstalled - - -
D1 1SS400SM Diode 1608 1SS400SM ROHM
D2 KDZ18B Diode, Zener 3516 KDZ18B ROHM
D3 RB160MM-90 Diode , Schottky 3516 RB160MM-90 ROHM
D4 - Notinstalled - - -
D5 RB160MM-90 Diode , Schottky 3516 RB160MM-90 ROHM
D6 - 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 76.8kΩ Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF7682 ROHM
R6 1kΩ Resistor, Chip, 1/8W, 1% 2012 MCR10EZPF1001 ROHM
R7 4.7 kΩ Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF4701 ROHM
R8 4.7 kΩ Resistor, Chip, 1/16W, 1% 1005 MCR01MZPF4701 ROHM
T1 50μH
U1 BD7F100EFJ I.C. BD7F100EFJ HTSOP-J8 BD7F100EFJ ROHM
Transformer, Np:Ns1:Ns2=1:1:1, ±20%
13.5 x 20.0 x 12.5mm CEP1311D-2415052R sumida
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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)
User’s Guide
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Reference Application Data
User’s Guide
VIN = 24V, V
15.5
15.4
15.3
15.2
15.1
[V]
15.0
OUT1
V
14.9
14.8
14.7
14.6
14.5
0.00 0.05 0.10 0.15
OUT1
= 15V, V
Figure 11. Load Regulation (V
90
80
70
60
50
40
Efficiency[%]
30
20
10
0
0.00 0.05 0.10 0.15
Figure 13. Efficiency vs Load Current
(I
= -15V
OUT2
I
OUT1[A]
I
OUT
[A]
OUT=IOUT1＝IOUT2
IOUT2＝IOUT1
IOUT2＝0[A]
IOUT2＝0.165[A]
) Figure 12. Load Regulation (V
OUT1
)
-14.5
-14.6
-14.7
-14.8
-14.9
[V]
-15.0
OUT2
V
-15.1
-15.2
-15.3
-15.4
-15.5
0.00 0.05 0.10 0.15
I
OUT2
IOUT1=IOUT2
IOUT1＝0[A]
IOUT1＝0.165[A]
[A]
OUT2
)
© 2017 ROHM Co., Ltd.
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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
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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)
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any license to use or exercise intellectual property or other rights held by ROHM or any other
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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.
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Please use the Products in accordance with any applicable environmental laws and regulations,
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and verify the latest specifica-
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