U210B1 Datasheet, PDF (8/12 Pages) TEMIC Semiconductors – Phase Control Circuit Load Current Feedback Applications

U210B1
50
40
Mains Supply
30
20
10
0
0
95 10315
6
5
4
3
2
1
0
0
95 10316
6
5
4
3
2
1
0
0
95 10317
4
8
12
16
I_tot ( mA )
Figure 12.
Mains Supply
10
20
30
40
R₁ ( kW )
Figure 13.
Mains Supply
3
6
9
I_tot ( mA )
Figure 14.
12
15
Design Calculations for Mains Supply
The following equations can be used for the evaluation of
the series resistor R₁ for worst case conditions:
+ R_1max
0.85
V_Mmin
2
– V_Smax
I_tot
+ R_1min
V_M – V_Smin
2 I_Smax
+ P_(R1max)
(V_Mmax – V_Smin)²
2 R₁
X ^where:
V_M = Mains voltage, 230 V
V_S = Supply voltage on Pin 3
I_tot = Total DC current requirement of the circuit
= I_Smax + I_p + I_x
I_Smax = Current requirement of the IC in mA
I_p = Average current requirement of the triggering
pulses
I_x = Current requirement of other peripheral
components
R₁ can be easily evaluated from the diagrams figures 12
to 14.
8 (12)
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96