U2008B [TEMIC]
Low Cost Current Feedback Phase Control Circuit; 低成本电流反馈相位控制电路
| 型号： | U2008B |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Low Cost Current Feedback Phase Control Circuit |
| 文件： | 总10页 (文件大小：123K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U2008B
Low Cost Current Feedback Phase Control Circuit
Description
The U2008B is designed as a phase control circuit in with load-current feedback and overload protection are
bipolar technology. It enables load-current detection as preferred applications.
well as mains-compensated phase control. Motor control
Features
Full wave current sensing
Internal supply-voltage monitoring
Current requirement 3 mA
Mains supply variation compensated
Variable soft-start or load-current sensing
Voltage and current synchronization
Automatic retriggering switchable
Triggering pulse typ. 125 mA
Applications
Low cost motor control
Domestic appliance
Package: DIP8, SO8
Block Diagram
22 k /2W
BYT51K
230 V ~
R
1
D
1
R
2
R
8
max
330 k
1 M
96 11643
Load
7
6
Limiting
detector
Voltage
detector
Mains voltage
compensation
Automatic
retriggering
Phase
–V
5
4
S
control unit
Current
detector
TIC
226
= f (V )
3
C
1
22 F/
25 V
R
3
Supply
voltage
limiting
8
1
GND
180
Reference
voltage
–
Full wave load
current detector
+
Voltage
monitoring
R
14
Soft start
47 k
2
3
P
1
R
10
Set point
100 k
50 k
^
R
6
V
= ±250 mV
(R6)
C
C
Load current
compensation
3
4
R
7
12 k
3.3 nF
100 nF
Figure 1. Block diagram with typical circuit: Load current sensing
TELEFUNKEN Semiconductors
1 (10)
Rev. A1, 28-May-96
U2008B
BYT51K
230 V ~
22 k /2W
R
1
D
L
1
R
2
R
8
max
680 k
470 k
96 11644
Load
7
6
Limiting
detector
Voltage
detector
Mains voltage
compensation
Automatic
retriggering
Phase
control unit
= f (V3)
–V
5
4
S
Current
detector
TIC
226
C
1
100 F/
25 V
R
3
Supply
voltage
limiting
8
1
GND
180
Reference
voltage
–
Full wave load
current detector
+
Voltage
monitoring
Soft start
2
3
P
R
10
1
Set point
68 k
Soft start
4.7 F/ 25 V
50 k
C
5
C
3
C
4
R
7
220 k
10 nF
100 nF
N
Figure 2. Block diagram with typical circuit: Soft start
2 (10)
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96
U2008B
Pin Description
Pin
1
2
Symbol
Function
Load current sensing
Ramp voltage
Output
I
1
2
3
4
8
7
6
5
sense
I
sense
Cϕ
3
Control Control input / compensation
output
V
sync.
Cϕ
4
5
6
7
8
GND
–V
Ground
Rϕ
Control
GND
Supply voltage
S
Rϕ
Ramp current adjustment
Voltage synchronization
Trigger output
V
sync.
V
S
Output
95 11405
trigger pulse is derived by comparing the ramp voltage V
Mains Supply, Pin 5, Figure 2
2
at Pin 2 with the set value on the control input, Pin 3. The
slope of the ramp is determined by C and its charging
current I .
The integrated circuit U2008B, which also contains
voltage limiting, can be connected via D and R via the
mains supply. Supply voltage between Pin 4 (pos.
1
1
)
,
and Pin 5 is smoothed by C .
The charging current can be regulated, changed, altered
1
using R at Pin 6. The maximum phase angle, α
max,
(minimum current flow angle
by using R (see figure 4).
) can also be adjusted
min
Series resistance R can be calculated as follows:
1
VM – VSmax
R1max
0.85 x
When the potential on Pin 2 reaches the set point level of
Pin 3, a trigger pulse is generated whose pulse width, t ,
2 x Itot
p
whereas
is determined from the value of C (t = 9 s/nF, see
p
V
V
Mains voltage
Maximum supply voltage
I I = Total current compensation
Smax
figure 6). At the same time, a latch is set with the output
pulse, as long as the automatic retriggering has not been
activated, then no more pulses can be generated in that
half cycle. Control input at Pin 3 (with respect to Pin 4)
M
Smax
I
tot
x
The appendix provides further information regarding the
design (see figures 10, 11 and 12). An operation with
external stabilized DC voltage is not recommended.
has an active range from –9 V to –1 V. When V = –9 V,
3
then the phase angle is at its maximum α
i.e., the
max
current flow angle is minimum. The minimum phase
angle α is set with V –1 V.
min
3
Voltage Monitoring
Automatic Retriggering
As the voltage is built up, uncontrolled output pulses are
avoided by internal voltage monitoring. Apart from that
all the latches in the circuit (phase control, load limit
regulation) are reset and the soft-start capacitor is short
circuited. This guarantees a specified start-up behavior
each time the supply voltage is switched on or after short
interruptions of the mains supply. Soft-start is initiated
after the supply voltage has been built up. This behavior
The current-detector circuit monitors the state of the triac
after triggering by measuring the voltage drop at the triac
gate. A current flow through the triac is recognized, when
the voltage drop exceeds a threshold level of typ. 40 mV.
If the triac is quenched within the relevant half-wave after
triggering; for example owing to low load currents before
or after the zero crossing of current wave or; for commu-
tator motors, owing to brush lifters. Then the automatic
retriggering circuit ensures immediate retriggering, if
guarantees
a gentle start-up for the motor and
automatically ensures the optimum run-up time.
necessary with a high repetition rate, t /t , until the triac
pp p
remains reliably triggered.
Phase Control, Pin 6
The function of the phase control is largely identical to the
well known IC family TEA1007. The phase angle of the
TELEFUNKEN Semiconductors
3 (10)
Rev. A1, 28-May-96
U2008B
Mains
96 11645
Current Synchronization, Pin 8
Current synchronization fulfils two functions:
R
2
Monitoring the current flow after triggering.
In case the triac extinguishes again or it does not switch
on, automatic triggering is activated as long as
triggering is successful.
7
U2008B
2x
BZX55
C6V2
Avoiding triggering due to inductive load.
In the case of inductive load operation the current
synchronization ensures that in the new half wave no
pulse is enabled as long as there is a current available
from the previous half-wave, which flows from the
opposite polarity to the actual supply voltage.
4
Figure 3. Suppression of automatic retriggering and mains
voltage compensation
A special feature of the IC is the realization of current
synchronization. The device evaluates the voltage at the
pulse output between the gate and reference electrode of
the triac. This results in saving separate current
synchronization input with specified series resistance.
A further feature of the IC is the selection between soft-
start or load-current compensation. Soft-start is possible
by connecting a capacitor between Pin 1 and Pin 4, see
figure 7. In the case of load current compensation, Pin 1
is directly connected with resistance R , which is used for
6
sensing load current.
Voltage Synchronization with Mains Voltage
Compensation, Pin 7
Load Current Detection, Pin 1
The voltage detector synchronizes the reference ramp
with the mains supply voltage. At the same time, the
mains dependent input current at Pin 7 is shaped and rec-
tified internally. This current activates the automatic
retriggering and at the same time is available at Pin 3 (see
figure 8). By suitable dimensioning, it is possible to attain
the specified compensation effect. Automatic
retriggering and mains voltage compensation are not
The circuit continuously measures the load current as a
voltage drop at resistance R . The evaluation and use of
6
both half waves results in a quick reaction to load current
change. Due to voltage at resistance R , there is an
6
increase of input current at Pin 1. This current increase
controls the internal current source, whose positive
current values is available at Pin 3 (see figure 9). The
output current generated at Pin 3 contains the difference
from the load-current detection and from the
mains-voltage compensation (see figure 1).
activated until |V – | increases to 8 V. Resistance, R
,
7
4
sync.
defines the width of the zero voltage cross-over pulse,
synchronization current, and hence the mains supply
voltage compensation current. If the mains voltage
compensation and the automatic retriggering are not
required, both functions can be suppressed by limiting
The effective control voltage is the final current at Pin 3
together with the desired value network. An increase of
mains voltage causes the increase of control angle α. An
increase of load current results in a decrease in the control
angle. This avoids a decrease in revolution by increasing
the load as well as the increase of revolution by the
increment of mains supply voltage.
|V
7 – 4
|
7 V (see figure 3).
4 (10)
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96
U2008B
Absolute Maximum Ratings
V = 14 V, reference point Pin 4, unless otherwise specified
S
Parameters
Symbol
Value
30
100
5
20
Unit
mA
Current limitation
Pin 5
–I
S
S
t
s
s
–i
Sync. currents
Pin 7
Pin 3
I
i
mA
syncV
syncV
t
Phase control
Control voltage
Input current
–V
I
V to 0
500
0.5
V
A
mA
I
S
I
Charge current
Pin 6
– I
ϕmax
Load current monitoring / Soft-start
Input current
Input voltage
Pin 1
I
V
1
mA
V
I
–40 to + 125
I
Pulse output
Input voltage
Pin 8
+V
–V
2
V
I
I
V
S
Storage temperature range
Junction temperature range
T
T
40 to 125
10 to 125
C
C
stg
j
Thermal Resistance
Parameters
Symbol
Value
Unit
K/W
Junction ambient
DIP8
SO8 on p.c.
SO8 on ceramic
R
thJA
110
220
140
Electrical Characteristics
V
S
–13 V, T
= 25°C, reference point Pin 4, unless otherwise specified
amb
Parameters
Test Conditions / Pins
Pin 5
–I = 3.5 mA
–I = 30 mA
Pins 1, 4 and 7 open
Symbol
–V
Min.
Typ.
11.3
Max.
Unit
Supply
Supply voltage limitation
14.5
14.6
16.5
16.8
3.0
V
S
S
S
Current requirement
Voltage monitoring
Turn-on threshold
Phase control
–I
mA
S
Pin 5
–V
12.3
V
TON
Input current
Voltage sync.
Current sync.
IL = 2 mA
Pin 7
Pin 8
Pin 7
I
I
V
0.15
8.5
2
30
9.0
mA
A
V
syncV
3
8.0
syncI
Voltage limitation
syncV
TELEFUNKEN Semiconductors
5 (10)
Rev. A1, 28-May-96
U2008B
Parameters
Reference ramp, figure 4
Charge current
Test Conditions / Pins
Symbol
Min.
Typ.
1.95
Max.
Unit
Pin 7
Pin 2
I
1
1.85
100
2.05
A
V
ϕ
Start voltage
–V
max
Temperature coefficient of
start voltage
Pin 2
Pins 6 – 5
Pin 6
–TC
–0.003
1.02
0.03
0.06
%/K
V
%/K
R
R − reference voltage
I
I
I
=
=
=
Α
Α
Α
V
Rϕ
0.96
100
1.10
150
ϕ
ϕ
Temperature coefficient
TC
ϕ
ϕ
VRϕ
Pulse output, figure 5
Output pulse current
Pin 8
V = – 1.2 V
8
R
= 0
I
125
30
mA
s
GT
0
Output pulse width
C = 3.3 nF, V = V
limit
t
p
3
S
Automatic retriggering
Turn-on threshold voltage
Repetition rate
Pin 8
V
20
3
60
7.5
mV
t
p
ION
I
150 A
t
pp
5
7
Soft start, figure 7
Starting current
Final current
Discharge current
Output current
Pin 1
V
V
= 8 V
= –2 V
I
I
–I
–I
5
10
25
15
40
A
A
mA
mA
1-4
0
0
15
0.5
0.2
1-4
0
0
Pin 3
2
Supply voltage compensation, figure 8
Current transfer gain I /I
Pins 7, Pin 3
Pins 1 and 2 open
V = V = V = 0
(R6)
7
3
G
14
17
20
2
i
Reverse current
3
7
Pin 3
IR
A
Load current detection, V = 0, figure 9
7
Transfer gain
Offset current
I /V
G
0.280
0.320
3
0.370
A/mV
3
1
V = 0,V = –8 V
1 3
Pin 3
Pin 1
Pin 1
I0
–V
V
0
0
300
6
400
6
A
mV
mV
Input voltage
Input offset voltage
I
6 (10)
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96
U2008B
1
0
250
200
150
100
50
Option Softstart
6.8 nF
4.7 nF 3.3 nF
33 nF
10 nF
2.2 nF
–1
–2
–3
–4
–5
C =1 F
5
10 F
C
= 1.5 nF
/ t
Supply
R =22k /2W
C =100 F/25V
4.7 F
1
1
0
5
0
1
2
3
4
0
200
400
600
)
800
1000
95 10337
t ( s )
96 11797
R ( k
Figure 7.
Figure 4.
0
40
80
120
100
Pulse Output
=–1.2V
V
GT
80
60
40
120
160
200
Mains Supply
Compensation
20
0
Pins 1 and 2 open
V =–13V
s
Reference Point
Pin 10
2
–2
–1
0
1
1000
0
200
400
600
)
800
95 10342
I
( mA )
15
95 10338
R
(
GT
Figure 8.
Figure 5.
100
80
400
300
200
100
0
Max. Series Resistance
=230V
Output Pulse Width
t / C =9 s/nF
p
V
M
60
40
20
0
10
30
0
2
4
6
8
0
10
C
20
95 10349
I ( mA )
S
95 10339
= ( nF )
Figure 6.
Figure 9.
TELEFUNKEN Semiconductors
7 (10)
Rev. A1, 28-May-96
U2008B
200
10
8
Reference Point
Pin 8
Load Current
Detection
Power Dissipation at Series Resistance
V =V =V
160
120
6
Ref
8
V =–13V
S
V
=V =0V
15
10
6
80
40
0
4
2
0
400
15
–400
–200
0
200
0
3
6
9
12
95 10343
V
( mV )
95 10350
I
S
( mA )
(R6)
Figure 10.
Figure 12.
revolu-
tion
10
8
Power Dissipation at Series Resistance R
1
6
4
2
0
50
0
10
20
30
)
40
95 10348
R ( k
1
Figure 11.
8 (10)
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96
U2008B
Dimensions in mm
Package: DIP8
94 8873
Package: SO8
94 8862
TELEFUNKEN Semiconductors
9 (10)
Rev. A1, 28-May-96
U2008B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
10 (10)
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96
相关型号：
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