SI3210-FT Datasheet, PDF (29/148 Pages) Silicon image – PROSLIC® PROGRAMMABLE CMOS SLIC/CODEC WITH RINGING/BATTERY VOLTAGE GENERATION

Si3210/Si3211
Table 20. Component Value Selection Examples for Si3210M MOSFET/Transformer DC-DC Converter¹
VDC Maximum Ringing Load/
Winding
Transformer Ratio R18
Loop Resistance
Connections²
3.3 V
3 REN/117 
1–2
1–2
0.06 
5.0 V
5 REN/117 
1–2
1–2
0.10 
12 V
5 REN/117 
1–3
1–3
0.6 
24 V
5 REN/117 
1–4
1–4
2.1 
Notes:
1. There are other system and software conditions that influence component value selection.
Refer to “AN45: Design Guide for the Si3210 DC-DC Converter” for detailed guidance.
2. Applies to transformer specified in Table 14; other transformers may vary.
R19, R20
7.15 k
16.5 k
56.2 k
121 k
Table 21. Component Value Selection Examples for Si3210 BJT/Inductor DC-DC Converter
VDC
Maximum Ringing Load/Loop Resistance
L1
R17
R18
5V
3 REN/117 
67 µH
150 
0.15 
12 V
5 REN/117 
150 µH
162 
0.56 
24 V
5 REN/117 
220 µH
175 
2.0 
Note: There are other system and software conditions that influence component value selection.
Refer to “AN45: Design Guide for the Si3210 DC-DC Converter” for detailed guidance.
R19, R20
16.5 k
56.2 k
121 k
Rev. 1.61
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