U211B-M Atmel, U211B-M Datasheet - Page 10

• Manufacturer Part Number: U211B-M
• Description: IC PHASE CONTROL TACHO 18-DIP
• Manufacturer: Atmel

Specifications of U211B-M

• Applications: AC Motor Controller
• Number Of Outputs: 1
• Current - Output: 7.5mA
• Voltage - Supply: 14.6 V ~ 16.6 V
• Operating Temperature: -10°C ~ 100°C
• Mounting Type: Through Hole
• Package / Case: 18-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Load: -

7.7
10
General Hints and Explanation of Terms
U211B
To ensure safe and trouble-free operation, the following points should be taken into consider-
ation when circuits are being constructed or in the design of printed circuit boards.
To achieve a high noise immunity, a maximum ramp voltage of 6V should be used. The typical
resistance R can be calculated from I as follows:
T =
C =
A 10% lower value of R (under worst case conditions) is recommended.
Figure 7-2.
R k
• The connecting lines from C
• The common (earth) connections of the set-point generator, the tacho generator and the
• The tacho generator should be mounted without influence by strong stray fields from the
• The connections from R
connection to pin 2 should not carry any additional high current such as the load current.
When selecting C
final interference suppression capacitor C
current.
motor.
=
T ms
-------------------------------------------------------------
Period duration for mains frequency (10 ms at 50 Hz)
Ramp capacitor, maximum ramp voltage 6 V and constant voltage drop at
R = 1.13 V
Explanation of Terms in Phase Relationship
C nF
1.13 V
2
, a low temperature coefficient is desirable.
Voltage
Current
Supply
Trigger
Mains
6 V
Pulse
Load
Load
V
10
V
GT
V
L
L
and C
10
2
to pin 7 and pin 2 should be as short as possible. The
3
5
should be as short as possible.
t
p
/2
4
of the f/V converter should not carry load
t
pp
= 4.5 t
p
3/2
2
4752B–INDCO–09/05