TEMIC Semiconductors U210B-FP
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.APPLICATIONS
Technology: BipolarFEATURES
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–FPDESCRIPTION
Mains supply 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.