U211B2

U211B2/ B3 Phase Control Circuit - General Purpose Feedback Description The integrated circuit U211B2/ B3 is designed as a phase control circuit in bipolar technology with an internal frequency-voltage converter. Furthermore, it has an internal control amplifier which means it can be used for speedregulated motor applications. It has an integrated load limitation, tacho monitoring and soft-start functions, etc. to realize sophisticated motor control systems. Features D D D D D D Internal frequency-to-voltage converter Externally-controlled integrated amplifier Overload limitation with a “fold back” characteristic Optimized soft-start function Tacho monitoring for shorted and open loop Automatic retriggering switchable 17(16) 1(1) D D D D D Triggering pulse typ. 155 mA Voltage and current synchronization Internal supply-voltage monitoring Temperature reference source Current requirement ≤ 3 mA DIP18 - U211B2, SO16 - U211B3 Package: 5*) Automatic retriggering Output pulse 4(4) Voltage / Current detector 11(10) + 10(9) – Control amplifier 6(5) 7(6) Phase control unit ö = f (V12) 3(3) Supply voltage limitation Reference voltage Voltage monitoring 2(2) –V S GND 14(13) 15(14) Load limitation speed / time controlled 16(15) controlled current sink –VRef 12(11) Soft start Frequencyto-voltage converter 9(8) 8(7) Pulse-blocking tacho monitoring 18*) 13(12) 95 10360 Figure 1. Block diagram (Pins in brackets refer to SO16) *) Pins 5 and 18 connected internally TELEF...