Rohm BD868 0MUF-C Series, User Manual

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User ’ s Guide
© 2022 ROHM Co., Ltd.
No. 65UG013E Rev.001
July 2022
Figure 4: MB Functional Blocks
For schematic details and BOM please refer to paragraph 7.
4.1. Input Jumper Selection and Protection Circuit
Different DBs can have different input voltage ranges. The input voltage is digitized and displayed in the
GUI. To get a better accuracy of the displayed input voltage jumper J3 must be set appropriately according to
the current input voltage range:
•
2.7
– 5.5V
•
7.4
– 55V
These two paths have different voltage divider circuits. They divide the value of the sensed input voltage
such that it remains below the maximum admissible value for the buffered sense circuit.
To avoid destruction of the sense circuit in case the input voltage is beyond the selected range, a circuit
protection is onboard to clamp the scaled-down input buffer voltage to a maximum of 4V.
Please note that if J3 is placed in the wrong position the input voltage value shown by the GUI will be
incorrect.
J7
J8
I/O signals
and I
2
C
Reference
Voltage
I
2
C Level
Shifters
Micro USB
Input Jumper
Selection and
Protection
Circuit
J3
GND
+V
IN
DB
Interface
area
CN7
CN8
CN9
Output
Acquisition
Block
I/O signal
Level
Shifters
CY8CKIT-059
plug-in board
CN1
CN2
CN3