U209B3
| Model | U209B3 |
| Description | Phase Control Circuit - Tacho Applications |
| PDF file | Total 14 pages (File size: 201K) |
| Chip Manufacturer | TEMIC |
U209B3/U209B3–FP
Design Calculations for Mains Supply
V
Mmin
– V
Smax
TELEFUNKEN Semiconductors
The following equations can be used for the evaluation of the series resistor R
1
for worst case conditions:
R
1
max
= 0.85
P
(R1
max
)
=
where:
V
M
V
S
I
tot
2 I
tot
(V
Mmax
– V
Smin
)
2
2 R
1
R
1
min
= 0.85
V
M
– V
Smin
2 I
Smax
= Mains voltage 220 V
= Supply voltage on Pin 4
= Total DC current requirement of the circuit
= I
S
+ I
p
+
I
x
I
Smax
= Current requirement of the IC in mA
= Average current requirement of the triggering pulse
I
p
= Current requirement of other peripheral components
I
x
R
1
can be easily evaluated from diagram figure 16 and 17
Dimensions in mm
94 9445
94 8875
14 (15)
Preliminary Information
Rev. A1: 31.09.1995
