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© 2021 ROHM Co., Ltd.
No. 63UG030E Rev.001
2021.7
User’s Guide
BD9E304FP4-EVK-001
Products lists in the Parts list
The product names listed in the parts list are available during the time of creating this user’s guide. In case some parts are
no longer available in the future, select the equivalent products.
Selection of Ceramic Capacitors
In selecting the ceramic capacitors, consider the DC bias characteristics and select the parts with equivalent actual
capacitance of capacitors in the Parts List (Table 2). For reference, Figure 17 shows the DC bias characteristics of
GRM32EC72A106KE05 (Murata) listed as C2 in the Parts list (Table 2). Actual capacitance degrades to 8.1μF under the
condition of 12V output (DC bias voltage is 12V). When selecting an alternative component, select the product that has same
capacitance under 12V of DC bias voltage. (The data shown in Figure 18 is for reference only. Please check with the capacitor
manufacturer for the DC bias characteristics of ceramic capacitors.)
Figure 17. GRM32EC72A106KE05 (Murata) DC bias characteristics
DC bias characteristics
P/N:GRM23EC72A106KE05
C-DC bias
capchange,25degC,AC1mVrms
DC Bias:12.0V
Cap.Change Rate:-19%
