U211B-XFPG3Y ATMEL Corporation, U211B-XFPG3Y Datasheet - Page 11
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U211B-XFPG3Y
Manufacturer Part Number
U211B-XFPG3Y
Description
Phase Control IC with Overload Limitation for Tacho Applications
Manufacturer
ATMEL Corporation
Datasheet
1.U211B-XFPG3Y.pdf
(30 pages)
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7.8
4752B–INDCO–09/05
Design Calculations for Main Supply
The following equations can be used for the evaluation of the series resistor R
conditions:
where:
V
V
I
I
I
I
R
Figure 10-16 on page
R
P
tot
Smax
p
x
S
M
1
1max
R1max
can be easily evaluated from the
=
0.85
=
--------------------------------------------- -
V
= Mains voltage
= Supply voltage on pin 3
= Total DC current requirement of the circuit
= I
= Current requirement of the IC in mA
= Average current requirement of the triggering pulse
= Current requirement of other peripheral components
V
------------------------------------- -
Mmax
Mmin
S
+ I
2 R
2 I
–
p
–
V
20.
tot
1
+ I
V
Smin
Smax
x
2
Figure 10-14 on page
R
1min
19,
=
Figure 10-15 on page 19
V
---------------------------- -
M
2 I
–
Smax
V
Smin
1
for worst case
U211B
and
11
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