User’s Guide
ROHM Battery Charger Solutions
BD99954MWV Evaluation Kit
Contents
Item No.
1
1.2
1.3
1.4
2
3
3.1
4
4.1
5
5.1
5.2
5.3
5.4
5.5
5.6
6
6.1
6.2
7
7.1
7.2
7.3
7.4
7.5
8
8.1
9
9.1
9.2
9.3
9.4
10
10.1
Topic
Introduction
Description
Applications
Features
Evaluation Board Operating Limits and Absolute Maximum Ratings
Power Up Procedure
Evaluation Kit Description
BD99954 GUI Installation
BD99954 GUI Uninstall
Miscellaneous Controls and Menus
Slave Address Indicator and Input Box
Write all Button
Device Connectivity Status Indicator
Edit Menu -> Change Device
Help Menu
About
Battery Charging Profile
Block Diagram of the Set Up for Battery Charging
Procedure and Set Up for Battery Charging
Additional Topics
Block Diagram of the Set Up for Reverse Buck Boost
Procedure and Set Up for Reverse Buck Boost
1-4 Cell Selection
Input Current Limit Upon Power Up
BC1.2 Detection
BD99954 Schematic
USB-to-I2C Schematic
Board Layout
Top View
GND Inner Layer1
PWR Inner Layer2
Bottom Layer
Bill of Materials
Bill of Materials: USB-to-I2C Schematic
Page No.
2
2
2
2
2
2
3
4
10
11
11
11
11
11
11
11
12
12
12
16
16
16
17
17
17
19
20
20
20
21
21
22
22
23
© 2017 ROHM Co., Ltd.
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No. 60UG041E Rev.001
OCT.2017
BD99954MWV Evaluation Kit
ROHM Battery Charger Solutions
User’s Guide
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.
BD99954MWV.
In addition to this, a user manual for the I2C control software is included to help program the
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
1-4 Li-ion Cells (in series) Battery Charging
1.3 Features
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
Input Voltage - VBUS
Input Voltage - VCC
Output Voltage - VSYS
Output Voltage - VBATT
Input Current - IIN
System Current - ISYS
Battery Charging Current - ICHARGE
3.8
3.8
2.56
0
-
-
-
MAX
25
25
19.2
19.2
16
16
16
UNIT
V
V
V
V
A
A
A
Table 1. BD99954 EVK Limits and Absolute Max. Ratings
3 Power up Procedure
1.
2.
3.
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.
If battery charging is in order, attach cell(s) to the VBATT (Figure 1) banana jacks.
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.
5.
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.
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.
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No. 60UG041E Rev.001
OCT.2017
BD99954MWV Evaluation Kit
4 BD99954 GUI Installation
1.
Make sure PC meets Minimum System Requirements.
Operating System
USB Port
Memory
Video Card
Minimum Resolution
Driver
Windows 7 or Higher
USB 2.0 or Higher
512 MB or Higher
512 MB or Higher
At least 1024 x 768
D2XX
User’s Guide
Table 2. System requirements for BD99954 GUI software
2.
Download BD99956 I2C Control Setup Wizard from (location).
initiate the setup wizard. (Image subject to change)
Once downloaded, double-click the executable file to
3.
4.
Make sure to follow the instructions of the setup wizard.
Click “Next” to proceed.
Figure 2. Software Installation Step (1/7)
© 2017 ROHM Co., Ltd.
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No. 60UG041E Rev.001
OCT.2017
BD99954MWV Evaluation Kit
5.
Agree to the Terms and Conditions
User’s Guide
Figure 3. Software Installation Step (2/7)
6.
Before installing the program, the default Destination Folder is set to
C:\Program Files(x86)\ROHM_BD99954_Battery_Charger.
Once destination folder is set, click “Install” to begin
installation.
Figure 4. Software Installation Step (3/7)
© 2017 ROHM Co., Ltd.
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No. 60UG041E Rev.001
OCT.2017
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