Phase Control Circuit - General Purpose Feedback
U211B2/ B3
Phase Control Circuit - General Purpose Feedback
Description
The integrated circuit U211B2/ B3 is designed as...
Description
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
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