TCA785 [INFINEON]
Phase Control IC; 相位控制IC
| 型号： | TCA785 |
| 厂家： | 
Infineon |
| 描述： | Phase Control IC |
| 文件： | 总16页 (文件大小：458K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Phase Control IC
TCA 785
Bipolar IC
Features
● Reliable recognition of zero passage
● Large application scope
● May be used as zero point switch
● LSL compatible
● Three-phase operation possible (3 ICs)
● Output current 250 mA
● Large ramp current range
● Wide temperature range
P-DIP-16-1
Type
Ordering Code
Package
TCA 785
Q67000-A2321
P-DIP-16-1
This phase control IC is intended to control thyristors, triacs, and transistors. The trigger pulses
can be shifted within a phase angle between 0 ˚ and 180 ˚. Typical applications include
converter circuits, AC controllers and three-phase current controllers.
This IC replaces the previous types TCA 780 and TCA 780 D.
Pin Definitions and Functions
Pin
Symbol
Function
1
GND
Ground
2
3
4
Q2
Q U
Q2
Output 2 inverted
Output U
Output 1 inverted
5
VSYNC
Synchronous voltage
6
7
I
Inhibit
Output Z
Q Z
8
V
R
REF
Stabilized voltage
9
9
Ramp resistance
10
C10
Ramp capacitance
11
12
13
V
11
Control voltage
Pulse extension
Long pulse
C
12
L
14
15
Q 1
Q 2
Output 1
Output 2
Pin Configuration
16
VS
Supply voltage
(top view)
09.94
Semiconductor Group
1
TCA 785
Functional Description
The synchronization signal is obtained via a high-ohmic resistance from the line voltage
(voltage V ). A zero voltage detector evaluates the zero passages and transfers them to the
5
synchronization register.
This synchronization register controls a ramp generator, the capacitor C10 of which is charged
by a constant current (determined by R
9). If the ramp voltage V10 exceeds the control voltage
V11 (triggering angle ϕ), a signal is processed to the logic. Dependent on the magnitude of the
control voltage V11, the triggering angle ϕ can be shifted within a phase angle of 0˚ to 180˚.
For every half wave, a positive pulse of approx. 30 µs duration appears at the outputs Q 1 and
Q 2. The pulse duration can be prolonged up to 180˚ via a capacitor C12. If pin 12 is connected
to ground, pulses with a duration between ϕ and 180˚ will result.
Q 1
Q 2
Outputs
and
supply the inverse signals of Q 1 and Q 2.
A signal of ϕ +180˚ which can be used for controlling an external logic,is available at pin 3.
A signal whichcorresponds to theNOR link of Q 1 and Q 2 is available at output Q Z(pin 7).
Q 1
Q 2
The inhibit input can be used to disable outputs Q1, Q2 and
,
.
Q 1
Q 2
Pin 13 can be used to extend the outputs
and
to full pulse length (180˚ – ϕ).
Block Diagram
Semiconductor Group
2
TCA 785
Pulse Diagram
Semiconductor Group
3
TCA 785
Absolute Maximum Ratings
Parameter
Symbol
Limit Values
Unit
min.
– 0.5
– 10
max.
18
Supply voltage
V
S
V
Output current at pin 14, 15
IQ
400
mA
Inhibit voltage
Control voltage
Voltage short-pulse circuit
V
V
V
6
– 0.5
– 0.5
– 0.5
VS
VS
VS
V
V
V
11
13
Synchronization input current
Output voltage at pin 14, 15
Output current at pin 2, 3, 4, 7
Output voltage at pin 2, 3, 4, 7
V
5
– 200
± 200
µA
V
V
Q
VS
IQ
10
mA
V
VQ
VS
Junction temperature
Storage temperature
T
j
150
125
˚C
˚C
Tstg
– 55
Thermal resistance
system - air
R
th SA
80
K/W
Operating Range
Supply voltage
VS
8
18
V
Operating frequency
Ambient temperature
f
10
– 25
500
85
Hz
˚C
T
A
Characteristics
8 ≤ VS ≤ 18 V; – 25 ˚C ≤ TA ≤ 85 ˚C; f = 50 Hz
Parameter
Symbol
Limit Values
Unit Test
Circuit
min.
typ.
max.
Supply current consumption
S1 … S6 open
IS
4.5
6.5
10
mA 1
V11 = 0 V
C
10 = 47 nF; R = 100 kΩ
9
Synchronization pin 5
Input current
I
5 rms
30
200
75
µA
1
R varied
2
Offset voltage
∆V
5
30
15
mV 4
Control input pin 11
Control voltage range
Input resistance
V
R
11
11
0.2
4
V10 peak
V
kΩ
1
5
Semiconductor Group
TCA 785
Characteristics (cont’d)
8 ≤ VS ≤ 18 V; – 25 ˚C ≤ TA ≤ 85 ˚C; f = 50 Hz
Parameter
Symbol
Limit Values
typ.
Unit Test
Circuit
min.
max.
Ramp generator
Charge current
I10
10
1000
µA
Max. ramp voltage
Saturation voltage at capacitor
Ramp resistance
V
V
R
10
10
9
V
350
300
2
– 2
V
1
100
3
225
80
mV 1.6
kΩ
µs
1
1
Sawtooth return time
tf
Inhibit pin 6
switch-over of pin 7
Outputs disabled
Outputs enabled
Signal transition time
Input current
V
6 L
3.3
3.3
2.5
V
V
µs
µA
1
1
1
1
V6 H
4
1
tr
5
800
I6 H
500
150
V
6
= 8 V
Input current
= 1.7 V
– I6 L
80
200
5
µA
1
1
V6
Deviation of I10
I
10
10
– 5
%
R
V
9
= const.
= 12 V; C10 = 47 nF
S
Deviation of I10
I
– 20
20
%
%
1
R
V
9
= const.
= 8 V to 18 V
S
Deviation of the ramp voltage
between 2 following
half-waves, V
S
= const.
∆V10 max
± 1
Long pulse switch-over
pin 13
switch-over of S8
Short pulse at output
Long pulse at output
Input current
V
V
13 H
13 L
3.5
45
2.5
2.5
V
V
µA
1
1
1
2
10
I13 H
V13 = 8 V
Input current
– I13 L
65
100
µA
1
V13 = 1.7 V
Outputs pin 2, 3, 4, 7
Reverse current
I
CEO
10
2
µA 2.6
V 2.6
V
Q
= V
Saturation voltage
= 2 mA
S
V
sat
0.1
0.4
IQ
Semiconductor Group
5
TCA 785
Characteristics (cont’d)
8 ≤ VS ≤ 18 V; – 25 ˚C ≤ TA ≤ 85 ˚C; f = 50 Hz
Parameter
Symbol
Limit Values
typ.
Unit Test
Circuit
min.
– 3
max.
Outputs pin 14, 15
H-output voltage
V
14/15 H
14/15 L
VS
VS
– 2.5
V
S
– 1.0
V
3.6
2.6
1
– I
L-output voltage
= 2 mA
Q
= 250 mA
V
0.3
20
0.8
30
2
V
IQ
Pulse width (short pulse)
S9 open
Pulse width (short pulse)
with C12
t
p
p
40
µs
t
530
620
760
µs/ 1
nF
Internal voltage control
Reference voltage
V
REF
2.8
3.1
3.4
V
1
Parallel connection of
10 ICs possible
TC of reference voltage
– 4
– 4
αREF
2 × 10
5 × 10
1/K 1
Semiconductor Group
6
TCA 785
Application Hints for External Components
min
max
Ramp capacitance
Triggering point
Charge current
The minimum and maximum values of I10
are to be observed
C
10 500 pF
1 µF1)
2)
2)
V
11 × R9 × C10
tTr
=
V
REF × K
REF × K
Ramp voltage
2)
V
V
REF × K × t
I10
=
V
10 max = V – 2 V V10 =
S
R
9
R9 × C10
Pulse Extension versus Temperature
1)
Attention to flyback times
2)
K = 1.10 ± 20 %
Semiconductor Group
7
TCA 785
Output Voltage measured to + V
S
Supply Current versus Supply Voltage
Semiconductor Group
8
TCA 785
It is necessary for all measurements to adjust the ramp with
the aid of C10 and R – 2 V
e.g. C10 = 47 nF; 18 V: R
9
in the way that 3 V≤ Vramp max ≤ V
S
9
= 47 kΩ; 8 V: R = 120 kΩ
9
Test Circuit 1
Semiconductor Group
9
TCA 785
The remaining pins are connected as in test circuit 1
Test Circuit 2
The remaining pins are connected as in test circuit 1
Test Circuit 3
Semiconductor Group
10
TCA 785
Remaining pins are connected as in test circuit 1
The 10 µF capacitor at pin 5 serves only for test purposes
Test Circuit 4
Test Circuit 5
Semiconductor Group
Test Circuit 6
11
TCA 785
Inhibit 6
Long Pulse 13
Pulse Extension 12
Reference Voltage 8
Semiconductor Group
12
TCA 785
Application Examples
Triac Control for up to 50 mA Gate Trigger Current
A phase control with a directly controlled triac is shown in the figure. The triggering angle of
the triac can be adjusted continuously between 0˚ and 180˚ with the aid of an external
potentiometer. During the positive half-wave of the line voltage, the triac receives a positive
gate pulse from the IC output pin 15. During the negative half-wave, it also receives a positive
trigger pulse from pin 14. The trigger pulse width is approx. 100 µs.
Semiconductor Group
13
TCA 785
Fully Controlled AC Power Controller
Circuit for Two High-Power Thyristors
Shown is the possibility to trigger two antiparalleled thyristors with one IC TCA 785. The trigger
pulse can be shifted continuously within a phase angle between 0˚ and 180˚ by means of a
potentiometer. During the negative line half-wave the trigger pulse of pin 14 is fed to the
relevant thyristor via a trigger pulse transformer. During the positive line half-wave, the gate of
the second thyristor is triggered by a trigger pulse transformer at pin 15.
Semiconductor Group
14
TCA 785
Half-Controlled Single-Phase Bridge Circuit with Trigger Pulse Transformer and Direct
Control for Low-Power Thyristors
Semiconductor Group
15
TCA 785
Half-Controlled Single-Phase Bridge Circuit with Two Trigger Pulse Transformers for
Low-Power Thyristors
Semiconductor Group
16
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