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Atmel Electronic Components Datasheet



U211B

Phase Control IC


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U211B pdf
Features
Internal Frequency-to-voltage Converter
Externally Controlled Integrated Amplifier
Overload Limitation with “Fold Back” Characteristic
Optimized Soft-start Function
Tacho Monitoring for Shorted and Open Loop
Automatic Retriggering Switchable
Triggering Pulse Typically 155mA
Voltage and Current Synchronization
Internal Supply-voltage Monitoring
Temperature Reference Source
Current Requirement 3mA
1. Description
The integrated circuit Atmel® U211B is designed as a phase-control circuit in bipolar
technology with an internal frequency-to-voltage converter. The device includes an
internal control amplifier which means it can be used for speed-regulated motor
applications.
Amongst others, the device features integrated load limitation, tacho monitoring and
soft-start functions, to realize sophisticated motor control systems.
Figure 1-1. Block Diagram
Phase Control
IC with
Overload
Limitation for
Tacho
Applications
Atmel U211B
17(16)
1(1)
Voltage/current
detector
11(10)
10(9)
Control
+ amplifier
-
14(13)
15(14)
Load limitation
speed/time
controlled
5*
Automatic
retriggering
Phase-
control unit
ϕ = f (V12)
Output
pulse
4(4)
6(5)
7(6)
Supply
voltage
limitation
3(3)
-VS
2(2)
GND
Reference 16(15)
voltage
Voltage
monitoring
Controlled
current sink
Soft start
-VRef
12(11)
13(12)
Pin numbers in brackets refer to SO16
*Pins 5 and 18 connected internally
Frequency-
to-voltage
converter
Pulse blocking
tacho
monitoring
18*
9(8) 8(7)
4752C–INDCO–10/11



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U211B pdf
2. Pin Configuration
Figure 2-1. Pinning DIP18
Note: The DIP18 package is no longer available and has end-of-life status. For new developments
please use the SO16 package.
Isync 1
GND 2
VS 3
Output 4
Retr 5
VRP 6
CP 7
F/V 8
CRV 9
U211B
18 PB/TM
17 Vsync
16 VRef
15 OVL
14 Isense
13 Csoft
12 CTR/OPO
11 OP+
10 OP
Table 2-1.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Pin Description
Symbol Function
Isync
GND
Current synchronization
Ground
VS
Output
Supply voltage
Trigger pulse output
Retr Retrigger programming
VRP Ramp current adjust
CP Ramp voltage
F/V Frequency-to-voltage converter
CRV Charge pump
OP- OP inverting input
OP+
OP non-inverting input
CTR/OPO Control input/OP output
Csoft
Isense
OVL
Soft start
Load-current sensing
Overload adjust
VRef
Vsync
PB/TM
Reference voltage
Voltage synchronization
Pulse blocking/tacho monitoring
2 Atmel U211B
4752C–INDCO–10/11



Part Number U211B
Description Phase Control IC
Maker Atmel - Atmel
Total Page 30 Pages
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