Phase Control Circuit for Industrial Applications
UAA145
Phase Control Circuit for Industrial Applications
Description
The UAA145 is a bipolar integrated circuit, designe...
Description
UAA145
Phase Control Circuit for Industrial Applications
Description
The UAA145 is a bipolar integrated circuit, designed to provide phase control for industrial applications. It permits the number of components in thyristor drive circuits to be drastically reduced. The versatility of the device is further enhanced by the provision of a large number of pins giving access to internal circuit points.
Features
D Separate pulse output synchronized by mains
half wave
Applications
D Output pulse-width is freely adjustable D Phase angle variable from >0° to <180° D High-impedance phase shift input D Less than 3° pulse symmetry between two half-cycles
or phase of different integrated circuits
D Industrial power control D Silicon controlled rectifier
Package: DIP16 (special case)
Block Diagram
9
om po ne
6
D Output pulse blocking
nt s
Pulse inhibit Puls generator 11
Voltage synchronisation
Gm bH
16 Channel selection Pos. / Neg. half wave 2
PHW 10
Ad ro nic C
Ramp generator 7
Comparator S
R Memory
14 NHW
–V Ref 15
Supply
+15
–15
13
3
1
8
95 11298
PHW = Positive half wave NHW = Negative half wave
Figure 1. Block diagram
TELEFUNKEN Semiconductors Rev. A1, 29-May-96
1 (11)
UAA145
General Description
The operation of the circuit is best explained with the help of the block diagram shown in figure 1. It comprises a synchronizing stage, ramp generator, voltage com-parator, pulse generator, channel selecting stage and two output amplifiers. The circuit diagram in ...
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