Switching Regulator Series Isolated DC/DC Converter BD7F100HFN Evaluation Board BD7F100HFN-EVK-001 General Description BD7F100HFN-EVK-001 Evaluation Board outputs 5.0V voltage from 24V input using IC BD7F100HFN, an isolated DC/DC converter. It supplies 800mA output current at maximum. Performance specifications (The values listed here are representative values, which does not assure the characteristics.) Unless otherwise is specified: VIN = 24V, VOUT = 5.0V Parameter Min Typ Max Units Conditions Input voltage range 24 V Output voltage 5.0 V R4=3.9k, R5=80.6k Output current range 13.8 800 mA Maximum Output Power:4W Input ripple voltage 80 mVpp IO = 500mA Output ripple voltage 80 mVpp I = 500mA O Output rise time 6 ms Operating frequency 400 kHz Maximum efficiency 76.7 % IO = 800mA www.rohm.co.jp 2016 ROHM Co., Ltd. All rights reserved. 1/11 2016.6.3 Rev.001 BD7F100HFN-EVK-001 Operation Procedures 1. Required equipment (1) DC power supply for 24V, 0.5A (2) 800mA load at maximum (3) DC voltmeter 2. Connect the equipment. (1) Preset DC voltage to 24V and power supply output to OFF. (2) Set load below 800mA to disable load. (3) Connect the power supply positive terminal to VIN + terminal, and the negative terminal to GND - terminal, using a pair of wires. (4) Connect the load positive terminal to VOUT + terminal, and the negative terminal to GND - terminal, using a pair of wires. (5) To measure input voltage, connect the DC voltmeter 1 positive terminal to TP1, and the negative terminal to TP2. (6) To measure output voltage, connect the DC voltmeter 2 positive terminal to TP4, and the negative terminal to TP3. (7) Turn ON DC voltage output. (8) Check that the DC voltmeter 2 reads 5.0V. (9) Enable load. + V DC voltmeter 1 + - V DC voltmeter 2 - + - DC power Load supply + - Figure 1. Connection Diagram www.rohm.co.jp 2016 ROHM Co., Ltd. All rights reserved. 2/11 2016.6.3 Rev.001 www.rohm.co.jp