TELEFUNKEN Semiconductors
U 210 B / U 210 B–FP
Phase Control Circuit – Load Current Feedback Applications
Technology: ...
TELEFUNKEN Semiconductors
U 210 B / U 210 B–FP
Phase Control Circuit – Load Current Feedback Applications
Technology: Bipolar Features
D Externally controlled integrated amplifier D Variable soft start D Automatic retriggering D
Voltage and current synchronisation D Triggering pulse typ. 125 mA D Internal supply
voltage monitoring D Temperature constant reference source D Current requirement ≤ 3 mA
Case: DIP 14, SO 16
Figure 1 Block diagram
Preliminary Information
1
U 210 B / U 210 B–FP
TELEFUNKEN Semiconductors
Figure 2 Block diagram with external circuitry Open loop control with load current compensation 2
Preliminary Information
TELEFUNKEN Semiconductors
U 210 B / U 210 B–FP
Description
Mains supply
The U 210 B is fitted with
voltage limiting and can therefore be supplied directly from the mains. The supply
voltage between Pin 2 (+pol/ă) and Pin 3 builds up across D1 and R1 and is smoothed by C1. The vaIue of the series resistance can be approximated using: R1= VM–VS 2 IS
Further information regarding the design of the mains supply can be found in the data sheets in the appendix. The reference
voltage source on Pin 13 of typ. –8.9 V is derived from the supply
voltage. It represents the reference level of the control unit. Operating using an externally stabiIised DC
voltage is not recommended. If the supply cannot be taken directly from the mains because the power dissipation in R1 would be too large, then the circuit shown in the following Figure 3 should be ...