Rohm BD7F100EFJ-EVK-002 User Manual

1

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

© 2017 ROHM Co., Ltd.

1/5

No. 60UG028E Rev.00

OCT.

BD7F

100

EFJ-

EVK

-

002

1

2017

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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No. 60UG028E Rev.00

OCT.