U2008B Datasheet | Atmel

Description The U2008B is designed as a phase-control circuit in bipolar technology. It enables load-current detection as well as mains-pensated phase control. Motor control with load-current feedback and overload protection are preferred applications. Features D Full wave current sensing D Mains supply variation pensated D Variable soft-start or load-current sensing D Voltage and current synchronization D Automatic retriggering switchable D Triggering pulse typ. 125 m A D Internal supply-voltage monitoring D Current requirement v 3 m A Applications D Low-cost motor control D Domestic appliance Block Diagram 22 k W/2W 230 V ~ R2 330 k W Load 7 Limiting detector Voltage detector 6 Mains voltage pensation R1 D1 BYT51K amax R8 1 MW Automatic retriggering Phase control unit ö = f (V3) - VS C1 22 m F/ 25 V 4 GND TIC 226 R3 180 W 8 Current detector Supply voltage limiting Full wave load current detector Soft start 2 3 R10 100 k W + - Reference voltage Voltage monitoring R14 47 k W P1 Set point R7 R6 ^ V(R6) = ±250 m V C3 3.3 n F C4 100 n F Load current pensation Figure 1. Block diagram with typical circuit: Load current sensing Rev. A4, 12-Jan-01 1 (10) Ordering Information Extended Type Number U2008B-x U2008B-x FP U2008B-x FPG3 Package DIP8 SO8 SO8 Remarks Tube Tube Taped and reeled 230 V ~ L R2 680 k W Load 22 k W/2W R1 D1 BYT51K amax R8 470 k W 6 Mains voltage pensation 7 Limiting detector Voltage detector Automatic retriggering Phase control unit ö = f (V3) Supply voltage limiting 5 - VS C1 100 m F/ 25 V 4 GND TIC 226 R3 180W 8 Current...