BD9G341AEFJ-EVK-101 ROHM

ROHM Switching Regulator Solutions Evaluation Board: High Voltage 3A Buck Converter With Integrated FET BD9G341AEFJ-EVK-101 (5V/3A Output) AEY60-D1-0002 Introduction This application note will provide the steps necessary to operate and evaluate ROHMs non-synchronous buck DC/DC converter using the BD9G341AEFJ evaluation boards. Component selection, board layout recommendations, operation procedures and application data is provided. Description This evaluation board has been developed for ROHMs non-synchronous buck DC/DC converter customers evaluating BD9G341AEFJ. While the BD9G341AEFJ accepts a power supply input range of 12V to 76V, and generates output voltages from 1V to Vcc, this evaluation board is setup for the same input voltage range and a fixed output of 5V can be produced. The IC has internal 150m N-channel MOSFET and the operating frequency is programmable from 50kHz to 750kHz. A fixed Soft Start circuit prevents inrush current during startup along with UVLO (under voltage lock out) and TSD (thermal shutdown detection), OCP (over current protection), OVP (over voltage protection) protection circuits. The under voltage lock out and hysteresis can be set by external resistor using EN pin. EN pin allows for simple ON/OFF control of the IC to reduce standby current consumption. Applications Industrial distributed power applications. Battery powered equipment. Evaluation Board Operating Limits Limit Parameter Symbol Unit Conditions MIN TYP MAX Supply Voltage BD9G341AEFJ VCC 12 - 76 V Output Voltage / Current VOUT - 5 - V BD9G341AEFJ IOUT - - 3 A Evaluation Board Below is evaluation board with the BD9G341AEFJ. Figure 1. BD9G341AEFJ Evaluation Board www.rohm.co.jp 1/11 No. 62UG034E Rev.004 2017 ROHM Co., Ltd. All rights reserved. DEC.2019 BD9G341AEFJ-EVK-101 Evaluation Board Schematic Below is evaluation board schematic for BD9G341AEFJ. Figure 2. BD9G341AEFJ Evaluation Board Schematic Evaluation Board Operation Procedures Below is the procedure to operate the evaluation board. 1. Connect power supplys GND pin to GND test point TP2 on the evaluation board. 2. Connect power supplys V pin to VIN test point TP1 on the evaluation board. This will provide VCC to the IC U1. Please note that CC the VCC should be in range of 12V to 76V. 3. Check if shunt jumper of J1 is at position ON (Pin2 connect to Pin1, EN pin of IC U1 is pulled high). 4. Connect electronic load to TP3 and TP4. Do not turn on load (electronic load is off power). 5. Turn on power supply. The output voltage VOUT(+5V) can be measured at the test point TP3. Now turn on the load. The load can be increased up to 3A MAX. Note s: The board does not support hot plugging protection. Do not perform hot plugging on this board. www.rohm.co.jp 2017 ROHM Co., Ltd. All rights reserved. No. 62UG034E Rev.004 2/11 DEC.2019 www.rohm.co.j p