Features
• Full-wave Current Sensing
Mains Supply Variation Compensated
Programmable Load-current Limitation with Over- and High-load Output
Variable Soft Start
Voltage and Current Synchronization
Automatic Retriggering Switchable
Triggering Pulse Typically 125 mA
Internal Supply-voltage Monitoring
Current Requirement ≤ 3 mA
Temperature-compensated Reference Voltage
Applications
Advanced Motor Control
Grinder
Drilling Machine
1. Description
The U2010B is designed as a phase-control circuit in bipolar technology for motor
control applications with load-current feedback and overload protection. It enables
load-current detection and has a soft-start function as well as reference voltage
output.
Figure 1-1. Block Diagram
Automatic
retriggering
Limiting
detector
Voltage
detector
Supply
voltage
Reference
voltage
Voltage
monitoring
Soft
start
Mains voltage
compensation
Current
detector
Level
shift
Output
High load
Overload
Programmable
overload
protection
Full wave
rectifier
Auto-
start
Phase
control unit
ϕ = f(V
4
)
α
max
I
max
Load
current
detector
15
2 3 4 5 6 7 8
14 13 12
10
9
16
1
11
1
A
GND
B
C
U2010B
2
100% 70%
- +
Phase-control
IC with Current
Feedback and
Overload
Protection
U2010B
4766C–INDCO–04/10