Philips TDA1023T-N3, TDA1023-N3 Datasheet

DATA SH EET
Product specification Supersedes data of August 1982 File under Integrated Circuits, IC02
May 1991
INTEGRATED CIRCUITS
TDA1023/T
May 1991 2
Philips Semiconductors Product specification
Proportional-control triac triggering circuit TDA1023/T
FEATURES
Adjustable width of proportional range
Adjustable hysteresis
Adjustable width of trigger pulse
Adjustable repetition timing of firing burst
Control range translation facility
Fail safe operation
Supplied from the mains
Provides supply for external temperature bridge
APPLICATIONS
Panel heaters
Temperature control
GENERAL DESCRIPTION
The TDA1023 is a bipolar integrated circuit for controlling triacs in a proportional time or burst firing mode. Permitting precise temperature control of heating equipment it is especially suited to the control of panel heaters. It generates positive-going trigger pulses but complies with regulations regarding mains waveform distortion and RF interference.
QUICK REFERENCE DATA
Note
1. Negative current is defined as conventional current flow out of a device. A negative output current is suited for positive triac triggering.
ORDERING INFORMATION
Note
1. TDA1023: 16 DIL; plastic (SOT38); SOT38-1; 1996 November 27.
2. TDA1023T: 16 mini-pack; plastic (SO16; SOT109A); SOT109-1; 1996 November 27.
SYMBOL PARAMETER MIN. TYP. MAX. UNIT
V
CC
supply voltage (derived from mains voltage) 13.7 V
V
Z
stabilized supply voltage for temperature bridge 8 V
I
16(AV)
supply current (average value) 10 mA
t
w
trigger pulse width 200 −µs
T
b
firing burst repetition time at CT = 68 µF 41 s
-I
OH
(1)
output current −−150 mA
T
amb
operating ambient temperature range 20 +75 °C
EXTENDED
TYPE NUMBER
PACKAGE
PINS PIN POSITION MATERIAL CODE
TDA1023 16 DIL plastic SOT38
(1)
TDA1023T 16 mini-pack plastic SO16; SOT109A
(2)
May 1991 3
Philips Semiconductors Product specification
Proportional-control triac triggering circuit TDA1023/T
Fig.1 Block diagram.
handbook, halfpage
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10
9
TDA1023
R
pd
n.c.
Q
HYS
PR
CI UR QR
BR
PW
TB
V
EE
V
Z
V
CC
n.c.
RX
MBA484
Fig.2 Pin configuration.
PINNING
SYMBOL PIN DESCRIPTION
R
pd
1 internal pull-down resistor n.c. 2 not connected Q 3 output HYS 4 hysteresis control input PR 5 proportional range control input CI 6 control input UR 7 unbuffered reference input QR 8 output of reference buffer BR 9 buffered reference input PW 10 pulse width control input V
Z
11 reference supply output TB 12 firing burst repetition time control
input
V
EE
13 ground V
CC
14 positive supply n.c. 15 not connected RX 16 external resistor connection
May 1991 4
Philips Semiconductors Product specification
Proportional-control triac triggering circuit TDA1023/T
FUNCTIONAL DESCRIPTION
The TDA1023 generates pulses to trigger a triac. These pulses coincide with the zero excursions of the mains voltage, thus minimizing RF interference and mains supply transients. In order to gate the load on and off, the trigger pulses occur in bursts thus further reducing mains supply pollution. The average power in the load is varied by modifying the duration of the trigger pulse burst in accordance with the voltage difference between the control input CI and the reference input, either UR or BR.
Power supply: V
CC
, RX and Vz (pins 14, 16 and 11)
The TDA1023 is supplied from the AC mains via a resistor R
D
to the RX connection (pin 16); the VEE connection (pin
13) is linked to the neutral line (see Fig.4a). A smoothing capacitor CS should be coupled between the VCC and V
EE
connections. A rectifier diode is included between the RX and V
CC
connections whilst the DC supply voltage is limited by a chain of stabilizer diodes between the RX and V
EE
connections (see Fig.3). A stabilized reference voltage (VZ) is available at pin 11 to
power an external temperature sensing bridge.
Supply operation
During the positive mains half-cycles the current through the external voltage dropping resistor R
D
charges the external smoothing capacitor CS until RX attains the stabilizing potential of the internal stabilizing diodes. R
D
should be selected to be capable of supplying the current ICC for the TDA1023, the average output current I
3(AV)
, recharge the smoothing capacitor CS and provide the supply for an external temperature bridge. (see Figs 9 to
12). Any excess current is by-passed by the internal stabilizer diodes. The maximum rated supply current, however, must not be exceeded.
During the negative mains half-cycles external smoothing capacitor CS supplies the sum of the current demand described above. Its capacitance must be sufficiently high to maintain the supply voltage above the specified minimum.
Dissipation in resistor RD is halved by connecting a diode in series (see Fig.4b and 9 to 12). A further reduction in dissipation is possible by using a high quality dropping capacitor CD in series with a resistor RSD (see Figs 4c and
14). Protection of the TDA1023 and the triac against mains-borne transients can be provided by connecting a suitable VDR across the mains input.
Control and reference inputs CI, BR and UR (pins 6, 9 and 7)
For the control of room temperature (5 °C to 30 °C) optimum performance is obtained by using the translation circuit. The buffered reference input BR (pin 9) is used as a reference input whilst the output reference buffer QR (pin
8) is connected to the unbuffered reference input UR (pin 7). This ensures that the range of room temperature is encompassed in most of the rotation of the potentiometer to give a linear temperature scale with accurate setting.
Should the translation circuit not be required, the unbuffered reference input UR (pin 7) is used as a reference input. The buffered reference input BR (pin 9) must then be connected to the reference supply output V
Z
(pin 11). For proportional power control the unbuffered reference
input UR (pin 7) must be connected to the firing burst repetition time control input TB (pin 12).The buffered reference input BR (pin 9), which is in this instance inactive, must then be connected to the reference supply output VZ (pin 11).
Proportional range control input PR (pin 5)
The output duty factor changes from 0% to 100% by a variation of 80 mV at the control input CI (pin 6) with the proportional range control input PR open. For temperature control this corresponds to a temperature difference of 1 K.
By connecting the proportional range control input PR (pin 5) to ground the range may be increased to 400 mV, i.e. 5 K. Intermediate values may be obtained by connecting the PR input to ground via a resistor R5 (see Table 1).
Hysteresis control input HYS (pin 4)
With the hysteresis control input HYS (pin 4) open, the device has a built-in hysteresis of 20 mV. For temperature control this corresponds with 0.25 K.
Hysteresis is increased to 320 mV, corresponding to 4 K, by grounding HYS (pin 4). Intermediate values are obtained by connecting pin 4 via resistor R4 to ground. Table 1 provides a set of values for R4 and R5 giving a fixed ratio between hysteresis and proportional range.
May 1991 5
Philips Semiconductors Product specification
Proportional-control triac triggering circuit TDA1023/T
Trigger pulse width control input PW (pin 10)
The width of the trigger pulse may be adjusted to the value required for the triac by choosing the value of the external synchronization resistor RS between the trigger pulse width control input PW (pin 10) and the AC mains. The pulse width is inversely proportional to the input current (see Fig.13).
Output Q (pin 3)
Since the circuit has an open-emitter output it is capable of sourcing current. It is thus suited for generating positive-going trigger pulses. The output is current-limited and short-circuit protected. The maximum output current is 150 mA and the output pulses are stabilized at 10 V for output currents up to that value.
To minimize the total supply current and power dissipation, a gate resistor R
G
must be connected between the output Q and the triac gate to limit the output current to the minimum required by the triac (see Figs 5 to 8).
Pull-down resistor R
pd
(pin 1)
The TDA1023 includes a 1.75 k pull-down resistor R
pd
between pins 1 and 13 (VEE, ground connection) intended for use with sensitive triacs.
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134)
SYMBOL PARAMETER MIN. MAX. UNIT
V
CC
DC supply voltage 16 V
Supply current
I
16(AV)
average 30 mA
I
16(RM)
repetitive peak 100 mA
I
16(SM)
non-repetitive peak (tp < 50 µs) 2A
V
I
input voltage, all inputs 16 V
I
6, 7, 9, 10
input current 10 mA
V
1
voltage on Rpd connection 16 V
V
3, 8, 11
output voltage, Q, QR, V
Z
16 V
Output current
-I
OH(AV)
average 30 mA
-I
OH(M)
peak max. 300 µs 700 mA
P
tot
total power dissipation 500 mW
T
stg
storage temperature range 55 +150 °C
T
amb
operating ambient temperature range 20 +75 °C
May 1991 6
Philips Semiconductors Product specification
Proportional-control triac triggering circuit TDA1023/T
CHARACTERISTICS
VCC = 11 to 16 V; T
amb
= 20 to +75 °C unless otherwise specified
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supply
V
CC
internally stabilized supply voltage at I16 = 10 mA
12 13.7 15 V
V
CC
/I16variation with I
16
30 mV/mA
I
16
supply current at V
16-13
= 11 to 16 V; I10 = 1mA; f = 50 Hz; pin 11 open; V
6-13
> V
7-13
pins 4 and 5 open −−6mA
pins 4 and 5 grounded −−7.1 mA
Reference supply output V
Z
(pin 11) for external temperature bridge
V
11-13
output voltage 8 V
I
11
output current −−1mA
Control and reference inputs CI, BR and UR (pins 6, 9 and 7)
V
6-13
input voltage to inhibit the output 7.6 V
I
6, 7, 9
input current V1 = 4 V −−2 µA
Hysteresis control input HYS (pin 4)
V
6
hysteresis pin 4 open 9 20 40 mV
V
6
hysteresis pin 4 grounded 320 mV
Proportional control range input PR (pin 5)
V
6
proportional range pin 5 open 50 80 130 mV
V
6
proportional range pin 5 grounded 400 mV
Pulse width control input PW (pin 10)
t
w
pulse width I
10(RMS)
= 1mA; f = 50 Hz 100 200 300 µs
Firing burst repetition time control input TB (pin 12)
TbC
T
firing burst repetition time, ratio to capacitor C
T
320 600 960 ms/µF
Output of reference buffer QR (pin 8)
output voltage at input voltage:
V
8-13
V
9-13
= 1.6 V 3.2 V
V
8-13
V
9-13
= 4.8 V 4.8 V
V
8-13
V
9-13
= 8 V 6.4 V
Output Q (pin 3)
V
OH
output voltage HIGH IOH = 150 mA 10 −−V
I
OH
output current HIGH −−150 mA
Internal pull-down resistor R
pd
(pin 1)
R
pd
resistance to V
EE
1 1.75 3 k
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