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U211B3 데이터시트 PDF




TEMIC Semiconductors에서 제조한 전자 부품 U211B3은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 U211B3 기능
기능 Phase Control Circuit - General Purpose Feedback
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U211B3 데이터시트, 핀배열, 회로
U211B2/ B3
Phase Control Circuit - General Purpose Feedback
Description
The integrated circuit U211B2/ B3 is designed as a phase
control circuit in bipolar technology with an internal fre-
quency-voltage converter. Furthermore, it has an internal
control amplifier which means it can be used for speed-
regulated motor applications.
Features
D Internal frequency-to-voltage converter
D Externally-controlled integrated amplifier
D Overload limitation with a “fold back” characteristic
D Optimized soft-start function
D Tacho monitoring for shorted and open loop
D Automatic retriggering switchable
It has an integrated load limitation, tacho monitoring and
soft-start functions, etc. to realize sophisticated motor
control systems.
D Triggering pulse typ. 155 mA
D Voltage and current synchronization
D Internal supply-voltage monitoring
D Temperature reference source
D Current requirement 3 mA
Package: DIP18 - U211B2,
SO16 - U211B3
17(16)
1(1)
Voltage / Current
detector
5*)
Automatic
retriggering
Output
pulse
4(4)
11(10)
Control
+ amplifier
10(9)
14(13)
15(14)
Load limitation
speed / time
controlled
Phase
control unit
ö= f (V12)
Supply
voltage
limitation
Reference
voltage
Voltage
monitoring
6(5)
7(6)
3(3)
–VS
2(2)
GND
16(15)
controlled
current sink
Soft start
–VRef
12(11)
13(12)
Frequency-
to-voltage
converter
Pulse-blocking
tacho
monitoring
9(8) 8(7)
18*)
95 10360
Figure 1. Block diagram (Pins in brackets refer to SO16)
*) Pins 5 and 18 connected internally
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96
1 (20)




U211B3 pdf, 반도체, 판매, 대치품
U211B2/ B3
VC3
V12
95 10272
V0
t1
t2
t3
ttot
t
Figure 4. Soft-start
t1 = build-up of supply voltage
t2 = charging of C3 to starting voltage
t1 + t2 = dead time
t3 = run-up time
ttot = total start-up time to required speed
C3 is first charged up to the starting voltage V0 with
mtypical 45 A current (t2). By then reducing the charging
mcurrent to approx. 4 A, the slope of the charging function
is substantially reduced so that the rotational speed of the
motor only slowly increases. The charging current then
increases as the voltage across C3 increases giving a
progressively rising charging function which accelerates
the motor more and more strongly with increasing
rotational speed. The charging function determines the
macceleration up to the set-point. The charging current can
have a maximum value of 55 A.
Frequency to Voltage Converter
The internal frequency to voltage converter (f/V-
converter) generates a DC signal on Pin 10 which is
proportional to the rotational speed using an AC signal
from a tacho-generator or a light beam whose frequency
is in turn dependent on the rotational speed. The high
impedance input Pin 8, compares the tacho-voltage to a
switch-on threshold of typ. –100 mV. The switch-off
threshold is given with –50 mV. The hysteresis
guarantees very reliable operation even when relatively
simple tacho-generators are used. The tacho-frequency is
given by:
+f
n
60
p (Hz)
where:
n = revolutions per minute
p = number of pulses per revolution
The converter is based on the charge pumping principle.
With each negative half wave of the input signal, a
quantity of charge determined by C5 is internally
amplified and then integrated by C6 at the converter
output on Pin 10. The conversion constant is determined
by C5, its charge transfer voltage of Vch, R6 (Pin 10) and
ƪ ƫ +the internally adjusted charge transfer gain.
Gi
I10
I9
8.3
k = Gi C5 R6 Vch
The analog output voltage is given by
@VO = k f
The values of C5 and C6 must be such that for the highest
possible input frequency, the maximum output voltage
WVO does not exceed 6 V. While C5 is charging up, the Ri
on Pin 9 is .approx. 6.7 k . To obtain good linearity of the
f/V converter the time constant resulting from Ri and C5
should be considerably less (1/5) than the time span of the
negative half-cycle for the highest possible input
frequency. The amount of remaining ripple on the output
voltage on Pin 10 is dependent on C5, C6 and the internal
charge amplification.
Gi Vch
VO =
C6
C5
The ripple Vo can be reduced by using larger values of
C6. However, the increasing speed will then also be
reduced.
The value of this capacitor should be chosen to fit the
particular control loop where it is going to be used.
Pulse Blocking
The output of pulses can be blocked using Pin 18 (standby
operation) and the system reset via the voltage monitor if
V18 –1.25 V. After cycling through the switching point
hysteresis, the output is released when V18 –1.5 V
followed by a soft-start such as that after turn on.
Monitoring of the rotation can be carried out by
connecting an RC network to Pin 18. In the event of a
short or open circuit, the triac triggering pulses are cut off
by the time delay which is determined by R and C. The
Wcapacitor C is discharged via an internal resistance
Ri = 2 k with each charge transfer process of the f/V
converter. If there are no more charge transfer processes
C is charged up via R until the switch-off threshold is
exceeded and the triac triggering pulses are cut off. For
operation without trigger pulse blocking or monitoring of
the rotation, Pins 18 and 16 must be connected together.
4 (20)
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96

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U211B3 전자부품, 판매, 대치품
V
Mains
Supply
VGT
95 10716
p/2 p 3/2p 2p
Trigger
Pulse
tp tpp = 4.5 tp
VL
Load
Voltage
IL
Load
Current
ö
F
Figure 6. Explanation of terms in phase relationship
U211B2/ B3
Design Calculations for Mains Supply
The following equations can be used for the evaluation of the series resistor R1 for worst case conditions:
+R1max
0.85
VMmin
2
– VSmax
Itot
+R1min
VM – VSmin
2 ISmax
+P(R1max)
(VMmax – VSmin)2
2 R1
where:
VM = Mains voltage
VS = Supply voltage on Pin 3
Itot = Total DC current requirement of the circuit
= IS + Ip + Ix
ISmax = Current requirement of the IC in mA
Ip = Average current requirement of the triggering pulse
Ix = Current requirement of other peripheral components
R1 can be easily evaluated from the figures 20 to 22.
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96
7 (20)

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