si3210 ETC-unknow, si3210 Datasheet - Page 20

• Manufacturer Part Number: si3210
• Description: Proslic Programmable Cmos Slic/codec With Ringing/battery Voltage Generation
• Manufacturer: ETC-unknow

Si 3210/ Si3 211/S i32 12
The subcircuit above can be substituted into any of the ProSLIC solutions as an optional bias circuit for Q5, Q6. For
this optional subcircuit, C7 and C8 are different in voltage and capacitance to the standard circuit. R23 and R24 are
additional components.
20
Table 18. Component Value Selection Examples for Si3210M MOSFET/Transformer DC-DC Converter
Table 19. Component Value Selection Examples for Si3210 BJT/Inductor DC-DC Converter
Component
Component
R23,R24
C7,C8
R28
R29
Note:
3.3 V
5.0 V
VDC
12 V
24 V
Note:
VDC
12 V
24 V
5 V
There are other system and software conditions that influence component value selection, so please refer to
AN45 “Design Guide for the Si3210 DC-DC Converter for detailed guidance.
There are other system and software conditions that influence component value selection, so
please refer to AN45 “Design Guide for the Si3210 DC-DC Converter for detailed guidance.
Figure 13. Si321x Optional Equivalent Q5, Q6 Bias Circuit
Table 17. Component Value Selection for Si3210/Si3210M
Ringing Load/Loop Resistance
Ringing Load/Loop Length
Table 16. Si321x Optional Bias Component Values
For V
For V
For V
100 nF, 100 V, X7R, 20%
For V
For V
3 REN/117
5 REN/117
5 REN/117
5 REN/117
3.0 k , 1/10 W, 5%
1/10 W, 1% resistor
1/10 W, 1% resistor
3 REN/117
5 REN/117
5 REN/117
RRE
CLAMP
80.6
CLAMP
CLAMP
R7
DD
DD
Q5
= 3.3 V: 26.1 k
= 5.0 V: 37.4 k
QRP
5551
Value
Value
R12
RRBN
5.1k
= 100 V: 676 k
= 80 V: 541 k
= 85 V: 574 k
Q3
QRDN
5401
R23
RRBN0
3.0k
Preliminary Rev. 1.11
100 nF
CRBN
C7
RTE
80.6
R6
Q6
150 H
560 H
33 H
L1
QTN
5551
Transformer Ratio
R13
RTBN
5.1k
Q4
where V
QTDN
5401
R24
RTBN0
3.0k
1 - 2
1 - 2
1 - 3
1 - 4
100
162
274
R17
where V
CLAMP
C8
CTBN
100 nF
R28 = (V
Murata, Johanson, Venkel
Supplier/Part Number
R29 = V
BE
0.12
0.56
is the clamping voltage for V
2.2
R18
is the nominal VBE for Q9
Comments
DD
0.56
0.10
0.68
2.20
CLAMP
R18
+ V
R19, R20
BE
16.5 k
56.2k
121 k
/148 A
)/148 A
R19, R20
7.15 k
16.5 k
56.2 k
121 k
BAT