u209b3 ETC-unknow, u209b3 Datasheet - Page 13

• Manufacturer Part Number: u209b3
• Description: Phase Control Circuit Tacho Applications
• Manufacturer: ETC-unknow

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