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U210B

TEMIC Semiconductors
Part Number U210B
Manufacturer TEMIC Semiconductors
Description Phase Control Circuit - Load Current Feedback Applications
Published Apr 16, 2005
Detailed Description TELEFUNKEN Semiconductors U 210 B / U 210 B–FP Phase Control Circuit – Load Current Feedback Applications Technology: ...
Datasheet PDF File U210B PDF File

U210B
U210B

Overview
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 employed.
Figure 3 Supply voltage for high current requirements Phase control The function of the phase control is largely identical to that of the well known components U 111 B and TEA 1007.
The phase angle of the trigger pulse is derived by comparing the ramp voltage, which is mains synchronised by the voltage detector, with the set value on the control input Pin 9.
The slope of the ramp is determined by C2 and its charging current.
The charging current can be varied using R2 on Pin 5.
The m...


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