Zero Voltage Switch
U217B/ U217B-FP
Zero Voltage Switch with Adjustable Ramp
Description
The integrated circuit, U217B, is designed as a ze...
Description
U217B/ U217B-FP
Zero Voltage Switch with Adjustable Ramp
Description
The integrated circuit, U217B, is designed as a zerovoltage switch in bipolar technology. It is used to control resistive loads at mains by a triac in zero-crossing mode. A ramp generator allows to realize power control function
by period group control, whereas full wave logic guarantees that full mains cycles are used for load switching.
Features
D Direct supply from the mains D Current consumption ≤ 0.5 mA D Very few external components D Full wave drive – no dc current component in the load
circuit
D Negative output current pulse typ. 100 mA –
short circuit protected
D Simple power control D Ramp generator D Reference voltage
Applications
D Full wave power control D Temperature regulation D Power blinking switch
Package: DIP8, SO8
Block Diagram
95 10872
220 kW R2 (250 V~) (Rsync)
D1 BYT86/800
R1
18 kW/ 2W
Load 1000 W
L
C2
2.2 mF/ 10 V
R4 100 kW
R5 15 kW
max
100 kW min
R6 58 kW
2
1 Ramp genera...
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