U209B_07 Datasheet, PDF (1/19 Pages) ATMEL Corporation – Phase Control IC for Tacho Applications

Features
• Internal Frequency-to-voltage Converter
• Externally Controlled Integrated Amplifier
• Automatic Soft Start with Minimized “Dead Time”
• Voltage and Current Synchronization
• Retriggering
• Triggering Pulse Typically 155 mA
• Internal Supply-voltage Monitoring
• Temperature-compensated Reference Source
• Current Requirement ≤ 3 mA
1. Description
The integrated circuit U209B is designed as a phase-control circuit in bipolar technol-
ogy with an internal frequency-to-voltage converter. The device includes an internal
open-loop amplifier, which means it can be used for motor speed control with tacho
feedback.
The U209B is a 14-pin shrink version of the U211B with reduced features. Using the
U209B, the designer is able to realize sophisticated as well as economic motor control
systems.
Figure 1-1. Block Diagram
14(16)
1(1)
Voltage/Current
detector
Automatic
retriggering
Output
4(4)
pulse
Phase Control
IC for Tacho
Applications
U209B
10(10)
+
9(9)
-
Control
amplifier
Phase
control unit
ϕ = f (V₁₁)
Supply
voltage
limitation
Reference
voltage
Voltage
monitoring
5(5)
6(6)
3(3)
-V_S
2(2)
GND
13(15)
Soft start
-V_S
11(11)
12(12)
Pin numbers in brackets refer to SO16 Package
Frequency-
to-voltage
converter
8(8) 7(7)
U209B
4765C–INDCO–02/07