器件名称: U2008B
功能描述: Low Cost Current Feedback Phase Control Circuit
文件大小: 122.43KB 共10页
简 介:U2008B
Low Cost Current Feedback Phase Control Circuit
Description
The U2008B is designed as a phase control circuit in bipolar technology. It enables load-current detection as well as mains-compensated phase control. Motor control with load-current feedback and overload protection are preferred applications.
Features
D Full wave current sensing D Mains supply variation compensated D Variable soft-start or load-current sensing D Voltage and current synchronization D Automatic retriggering switchable D Triggering pulse typ. 125 mA D Internal supply-voltage monitoring D Current requirement 3 mA
v
Applications
D Low cost motor control D Domestic appliance
Package: DIP8, SO8
Block Diagram
22 kW/2W 230 V ~ 330 kW Load 7 Limiting detector Voltage detector 6 Mains voltage compensation R2 R1 BYT51K D1
amax
1 MW
96 11643
R8
Automatic retriggering Phase control unit
5
TIC 226 R3 180W 8
Current detector
–VS 22 mF/ 25 V C1
= f (V3)
Supply voltage limiting
4
GND
1
Full wave load current detector Soft start 2 3
+
–
Reference voltage Voltage monitoring R14
47 kW
R10 R6 ^ V(R6) = ±250 mV C3 3.3 nF C4 100 nF
100 kW
Set point R7
P1 50 kW
Load current compensation
12 kW
Figure 1. Block diagram with typical circuit: Load current sensing
TELEFUNKEN Semiconductors Rev. A1, 28-May-96
1 (10)
U2008B
230 V ~ L 680 kW Load 7 Limiting detector Voltage detector 6 Mains voltage compensation R2 22 kW/2W R1 D1 BYT51K
amax
470 kW
96 11644
R8
Automatic retriggering
TIC 22……
