BD7F100HFN-EVK-002 ROHM

Users Guide Switching Regulator Series Isolated Flyback DC/DC Converter BD7F100HFN-LB Evaluation Board BD7F100HFN-EVK-002 (24V5V, 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. V = 24V, V = 5V, Unless otherwise specified. IN OUT Parameter Min Typ Max Units Conditions Input Voltage 24.0 V Output Voltage 5.0 V R4=3.9k, R5=80.6k Output Current Range 13.8 1000 mA Maximum Output Power5W Operating Frequency 400 kHz Maximum Efficiency 77.5 % I = 1000mA O Evaluation Board PCB size: 70mm50mm1.6mm Figure 1. BD7F100HFN-EVK-002 Evaluation Board Figure 2. BD7F100HFN-EVK-002 Evaluation Board Top View Bottom View 2017 ROHM Co., Ltd. No. 60UG032E Rev.001 1/5 OCT.2017BD7F100HFN-EVK-002 Users Guide 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 loads 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. + + DC Voltmeter 1 V DC Voltmeter 2 V - - + - Load DC Power - + Figure 3. Connection Diagram 2017 ROHM Co., Ltd. No. 60UG032E Rev.001 2/5 OCT.2017