器件名称: U2008B-MFPG3
功能描述: Low-Cost Phase-Control IC with Soft Start
文件大小: 70.34KB 共10页
简 介:U2008B
Low-Cost Phase-Control IC with Soft Start
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 v 3 mA
Applications
D Low-cost motor control D Domestic appliance
Block Diagram
22 kW/2W 230 V ~ R2 330 kW Load 7 Limiting detector Voltage detector 6 Mains voltage compensation R1 D1 BYT51K
amax
R8 1 MW
Automatic retriggering Phase control unit = f (V3)
U2008B
5 –VS C1 22 mF/ 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 kW + – Reference voltage Voltage monitoring
1
R14 47 kW P1
Set point R7
R6
^ V(R6) = ±250 mV
C3 3.3 nF
C4 100 nF
Load current compensation
Figure 1. Block diagram with typical circuit: Load current sensing
Rev. A4, 12-Jan-01
1 (10)
U2008B
Ordering Information
Extended Type Number U2008B-x U2008B-xFP U2008B-xFPG3 Package DIP8 SO8 SO8 Remarks Tube Tube Taped and reeled
230 V ~ L R2 680 kW Load
22 kW/2W R1 D1
BYT51K
amax
R8 470 kW 6 Mains voltage compensation
7 Limiting detec……