Datasheet TEA1007 Datasheet (TEMIC)

Page 1

Simple Phase Control Circuit

Description

Integrated circuit, TEA1007, is designed as a general phase control circuit in bipolar technology. It has an internal supply voltage limitation. With typical 150 mA ignition pulse, it is possible to determine the phase-shift

Features

Current consumption v 2.5 mA

Ignition pulse typ. 150 mA

Voltage and current synchronization

TEA1007

of the ignition point by comparing the mains sync. ramp voltage with a preset required value. It generates a single ignition pulse per half wave; therefore, it is suitable for capacitive and inductive loads in low cost applications.

Internal supply voltage control

Package: DIP8

Block Diagram

R = series resistance

TELEFUNKEN Semiconductors

Rev . A1, 28-May-96

Figure 1. Block diagram with typical circuitry

1 (8)

Page 2

TEA1007

General Description

The phase-shift of the ignition point is determined in the usual manner by comparison between a mains synchronized ramp voltage and a predetermined required value. The capacitor C reference point Pin 8 is discharged at the zero transition of the mains voltage via the V switch S

. After the end of the zero transition pulse, C

is charged from the constant current source Iö, whose value is adjusted externally with R unavoidable tolerance of C

When the potential at Pin 7 reaches the nominal value predetermined at Pin 6, the thyristor Th functions as a comparator, ignites and sets the following clock flip-flop. The output of the clock flip-flop releases the output amplifier, connects a second constant current source to the capacitor C voltage switch S voltage V

The capacitor C

+ Itp until it reaches the internal reference voltage

. The length of this Phase 2 corresponds to the width

Ref

via an RS flip-flop and the OR gate G1.

Ref1

of the output pulse t the value V

, thyristor Th1ignites again and resets the

Ref

clock flip-flop to its initial state. The output pulse is thus terminated and the constant source I However, the RS flip-flop holds the switch S internal reference voltage remains connected to Th

is greater than the maximum permissible control

Ref

voltage at Pin 6, this prevents more than one ignition pulse from being generated in each half-cycle of the mains voltage. This is particularly important because the energy contents of the output pulse is of the same order as the internal requirements of the circuit for each half-wave.

between Pin 7 and the common

detector, gate G2and

at Pin 3 due to the

(Phase 1).

, which also

, and switches the reference

to an internally generated threshold

is charged in this second phase by

. When the capacitor voltage reaches

is switched off.

so that the

. As

95 11358

Figure 2. Functional diagram for inductive load of

max

In the following zero transition of the mains voltage, the zero transition detector (Input Pin 5) resets the RS flip-flop, discharges C

again via S2, and also insures

that the clock flip-flop is in the reset condition. A further part of the basic function is the current detector with its input at Pin 4. When controlling inductive loads, the load current lags behind the mains voltage which means that the circuit could generate an ignition pulse during the period in which current is still flowing with a polarity opposite to that of the mains voltage if the current were not taken into account (see figure 2).

This, in turn, would lead, to so-called “gaps” in the load current as the next ignition pulse is generated in the subsequent half-cycle.

2 (8)

Figure 3. Triac voltages + currents at resistive load

= Zero cross voltage

= Zero cross current

= Mains voltage

= Load current

= Gate current

= Triac voltage at anode HI

TELEFUNKEN Semiconductors

Rev . A1, 28-May-96

95 11360

Page 3

TEA1007

In indication as to whether load current is flowing or not is provided by the triac itself. When the triac is ignited, the voltage at electrode H

drops from the instantaneous

value of the mains voltage to approximately 1.5 V, the value of the forward voltage of the triac. When the load current drops below the hold current of the triac towards the end of the half-cycle, V

again returns to the instan-

taneous value of the mains voltage. The current detector with its input at Pin 4 now controls this triac voltage and blocks the pulse generator via G

and S1by increasing the

reference voltage as long as the triac is conducting. As, in the case of a resistive load, the triac may be extinguished shortly before the zero transition of the mains voltage – when the load current drops below the hold current – the RS flip-flop must prevent any possible second ignition pulse from being generated.

Additional Function

An internal supply voltage control circuit insures that output pulses can be generated only when the supply voltage required for operation of all logic functions is available.

Series resistance R

1max

= IS + IP + Ix whereas

tot

= Total current consumption

tot

= Current requirement of the lC

= A verage current requirement of the triggering pulses

= Current requirement of other peripheral components

can be calculated approx. as follows:

–V

0.85

Mmin

2 I

Smax

tot

Determination of Gate Series Resistance, Firing Current and Pulse Width

95 11359

Figure 4. Functional diagram for resistive load and

Firing current requirement depends upon the triac used which can be regulated with series resistance as given below:

Gmax

[

tP[

12.5 V – V

8ms

Gmax

– 110

whereas: V

=Triac’s gate voltage

=Triac’s gate current

=Gate current requirement – average

T =Period duration of mains frequency

=(firing) pulse width

=Ramp capacitor

min

TELEFUNKEN Semiconductors

Rev . A1, 28-May-96

3 (8)

Page 4

TEA1007

Absolute Maximum Ratings

Reference point Pin 8

Parameters Symbol Value Unit

Current consumption Pin 1 –I

t<10 ms

Sync. currents: Pin 4

Pin 5

t<10 ms Pin 4

Pin 5 Input current Pin 3 –I Input voltages: Pin 6

Pin 2 Power dissipation

=45°C

amb

= 85°C

amb

Junction temperature T Ambient temperature range T Storage temperature range T

–i

syncI

syncV

sync.I

sync.V

–V

tot

amb

stg

S s

30 mA 60 10

mA 10 60 60

5 mA

–VSx

VIx

400

225

125 °C

0 to 80 °C

–40 to +125 °C

Thermal Resistance

Parameters Symbol Value Unit

Junction ambient DIP8

SO8 (P.C.) SO8 (ceramic)

Electrical Characteristics

Reference point Pin 8, unless otherwise specified

Parameters Test Conditions / Pin Symbol Min Type Max Unit Mains supply Pin 1 –V Current consumption I Sync. currents Pin 4

Pin 5

Output pulse current VS= 13.5 V,

= 0, VG = 1.2 V Pin 2 I

Output pulse width C

Charge current

= 3.3 nF Pin 2

= 6.8 nF

Phase 1"

= 3.3 nF

= 6.8 nF

Phase 2"

Pin 7

Pin 7 I Drive current Pin 6 I Balance between two half

= constant

cycles

I I

thJA

syncI. syncV

t i

Dö

200

K/W 220 140

13.5 17 V

2.5 mA

0.35

0.65 mA

90 180

30 64

4.3

1.3 mA

0.5

3 °

4 (8)

TELEFUNKEN Semiconductors

Rev . A1, 28-May-96

Page 5

Applications

TEA1007

Figure 5. Phase control for fan motors – 230 V

TELEFUNKEN Semiconductors

Rev . A1, 28-May-96

Figure 6. Two-phase time-switch, 230 V

5 (8)

Page 6

TEA1007

The timing switch using the TEA 1007 permits two-phase operation of loads with conduction angle ö adjustable as required (see figure 6).

Phase 1:

max

Period t = 5 to 320 sec adjustable with R

adjustable with R

21 22

Phase 2:

min

adjustable with R

Period t = optional, or up to the pressed time of switch S

Phase 1 begins as soon as the mains voltage is applied. The maximum angle of conduction by means of R

. The timing circuit comprises T1, T2, Z1,

can be adjusted

max

and R22. As the voltage to which C3is charged

increases, the current through Z potential at the emitter of T current through Z

becomes zero, T1can no longer conduct. The potential on R conduction angle ö decreases to the value

max

(Phase 2).

adjustable by means of R The transition from

following the adjustment of R

decreases. When the

has climbed so high that the

therefore drops. The

takes place continuously

min

and takes ca. 2 to 20 secs.

min

The time constant of Phase 1, which is also determined by

, begins with the release of key S. If S is pressed again

before the end of the time constant, a period equal to the complete time-constant is added to the time already run.

The circuit is powered direct from mains via D every negative half-cycle. C

smooths the operating

and R1in

voltage which settles at a level of ca. 15.5 V.

6 (8)

Figure 7. Fading circuit for manual operation

TELEFUNKEN Semiconductors

Rev . A1, 28-May-96

Page 7

Dimensions in mm

Package: DIP8

TEA1007

TELEFUNKEN Semiconductors

Rev . A1, 28-May-96

7 (8)

Page 8

TEA1007

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.

8 (8)

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

TELEFUNKEN Semiconductors

Rev . A1, 28-May-96