No. 60AP001E Rev.001 2017 ROHM Co., Ltd. 2017.4 User s Guide ROHM Battery Charger Solutions BD99954MWV Evaluation Kit Contents Item No. Topic Page No. 1 Introduction 2 1.2 Description 2 1.3 Applications 2 1.4 Features 2 2 Evaluation Board Operating Limits and Absolute Maximum Ratings 2 3 Power Up Procedure 2 3.1 Evaluation Kit Description 3 4 BD99954 GUI Installation 4 4.1 BD99954 GUI Uninstall 10 5 Miscellaneous Controls and Menus 11 5.1 Slave Address Indicator and Input Box 11 5.2 Write all Button 11 5.3 Device Connectivity Status Indicator 11 5.4 Edit Menu -> Change Device 11 5.5 Help Menu 11 5.6 About 11 6 Battery Charging Profile 12 6.1 Block Diagram of the Set Up for Battery Charging 12 6.2 Procedure and Set Up for Battery Charging 12 7 Additional Topics 16 7.1 Block Diagram of the Set Up for Reverse Buck Boost 16 7.2 Procedure and Set Up for Reverse Buck Boost 16 7.3 1-4 Cell Selection 17 7.4 Input Current Limit Upon Power Up 17 7.5 BC1.2 Detection 17 8 BD99954 Schematic 19 8.1 USB-to-I2C Schematic 20 9 Board Layout 20 9.1 Top View 20 9.2 GND Inner Layer1 21 9.3 PWR Inner Layer2 21 9.4 Bottom Layer 22 10 Bill of Materials 22 10.1 Bill of Materials: USB-to-I2C Schematic 23 2017 ROHM Co., Ltd. No. 60UG041E Rev.001 1/24 OCT.2017 BD99954MWV Evaluation Kit User s Guide ROHM Battery Charger Solutions BD99954MWV Evaluation Kit 1 Introduction This application note provides information on the BD99954MWV EVK board, which includes the bill of materials, schematics, board layout, and application data. In addition to this, a user manual for the I2C control software is included to help program the BD99954MWV. 1.1 Description The BD99954MWV EVK acts as a platform for the BD99954 battery management LSI. With the included software GUI, users can access the battery charging profile and modify and read back the registers of the BD99954. 1.2 Applications 1.3 Features 1-4 Li-ion Cells (in series) Battery Charging Reverse Buck/Boost Option On-Board USB-to-I2C Communication Circuit Input Operating Range: 3.8V to 25V 2 Evaluation Board Operating Limits and Absolute Maximum Ratings MIN MAX UNIT Input Voltage - VBUS 3.8 25 V Input Voltage - VCC 3.8 25 V Output Voltage - VSYS 2.56 19.2 V Output Voltage - VBATT 0 19.2 V Input Current - IIN - 16 A System Current - ISYS - 16 A Battery Charging Current - ICHARGE - 16 A Table 1. BD99954 EVK Limits and Absolute Max. Ratings 3 Power up Procedure 1. Attach power supply to VBUS/VCC banana jacks. BD99954 will detect which node is being used to power up IC, but if both VBUS and VCC (Figure 1) are connected to a source, VBUS will have priority to power up IC unless programmed otherwise. 2. If battery charging is in order, attach cell(s) to the VBATT (Figure 1) banana jacks. 3. Set up power supply voltage to between 3.8V to 25V. Note that on powering up that the default input current limit is set to 512mA by a resistor divider on the board (R5 and R6) (Refer to Schematic pg.12). The ILIM can be modified by changing the IBUS LIM SET(Reg 8h) or ICC LIM SET(Reg 7h) for VBUS or VCC inputs respectively, through the software. 4. Turn on power supply. Voltage on VSYS (Figure 1) should be around 8.9V. This is the default value that is programmed into the chip upon power up. 5. If user would like to program the registers of the BD99954, connect micro-USB (Figure 1) to the board (J48) to the USB port of a computer, then utilize the BD99954 I2C Control Software. Refer to BD99954 I2C Control Software User Manual for more information. 2017 ROHM Co., Ltd. No. 60UG041E Rev.001 2/24 OCT.2017