TCA785

TCA785 Datasheet

TCA 785

Part	Datasheet
TCA785	TCA785 (pdf)

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TCA 785 Phase Control IC q Reliable recognition of zero passage q Large application scope q May be used as zero point switch q LSL compatible q Three-phase operation possible 3 ICs q Output current 250 mA q Large ramp current range q Wide temperature range TCA 785 Bipolar IC P-DIP-16-1 Type TCA 785 Ordering Code Q67000-A2321 Package 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 Configuration top view Semiconductor Group Pin Definitions and Functions Symbol Function Ground Output 2 inverted Output U Output 1 inverted VSYNC Synchronous voltage Inhibit Output Z V REF Stabilized voltage Ramp resistance Ramp capacitance Control voltage Pulse extension Long pulse Output 1 Output 2 Supply voltage TCA 785 Functional Description The synchronization signal is obtained via a high-ohmic resistance from the line voltage V5 . A zero voltage detector evaluates the zero passages and transfers them to the synchronization register. This synchronization register controls a ramp generator, the capacitor C10 of which is charged by a constant current determined by R9 . If the ramp voltage V10 exceeds the control voltage V11 triggering angle a signal is processed to the logic. Dependent on the magnitude of the control voltage V11, the triggering angle can be shifted within a phase angle of to For every half wave, a positive pulse of approx. 30 µs duration appears at the outputs Q 1 and Q The pulse duration can be prolonged up to via a capacitor C12. If pin 12 is connected to ground, pulses with a duration between and will result. Outputs Q 1 and Q 2 supply the inverse signals of Q 1 and Q A signal of which can be used for controlling an external logic,is available at pin A signal which corresponds to the NOR link of Q 1 and Q 2 is available at output Q Z pin 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 Q 1 and Q 2 to full pulse length Block Diagram Semiconductor Group TCA 785 Pulse Diagram Semiconductor Group TCA 785 Absolute Maximum Ratings Parameter Supply voltage Output current at pin 14, 15 Inhibit voltage Control voltage short-pulse circuit 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 Junction temperature Storage temperature Thermal resistance system - air Operating Range Supply voltage Operating frequency Ambient temperature Limit Values min.

PDF Datasheet Preview

TCA 785

Phase Control IC
q Reliable recognition of zero passage q Large application scope q May be used as zero point switch q LSL compatible q Three-phase operation possible 3 ICs q Output current 250 mA q Large ramp current range q Wide temperature range

TCA 785

Bipolar IC

P-DIP-16-1

Type TCA 785
Ordering Code Q67000-A2321

Package 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 Configuration top view

Semiconductor Group

Pin Definitions and Functions

Symbol Function

Ground

Output 2 inverted

Output U

Output 1 inverted

VSYNC

Synchronous voltage

Inhibit

Output Z

V REF

Stabilized voltage

Ramp resistance

Ramp capacitance

Control voltage

Pulse extension

Long pulse

Output 1

Output 2

Supply voltage

TCA 785

Functional Description The synchronization signal is obtained via a high-ohmic resistance from the line voltage V5 . A zero voltage detector evaluates the zero passages and transfers them to the synchronization register. This synchronization register controls a ramp generator, the capacitor C10 of which is charged by a constant current determined by R9 . If the ramp voltage V10 exceeds the control voltage V11 triggering angle a signal is processed to the logic. Dependent on the magnitude of the control voltage V11, the triggering angle can be shifted within a phase angle of to For every half wave, a positive pulse of approx. 30 µs duration appears at the outputs Q 1 and Q The pulse duration can be prolonged up to via a capacitor C12. If pin 12 is connected to ground, pulses with a duration between and will result. Outputs Q 1 and Q 2 supply the inverse signals of Q 1 and Q A signal of which can be used for controlling an external logic,is available at pin A signal which corresponds to the NOR link of Q 1 and Q 2 is available at output Q Z pin 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 Q 1 and Q 2 to full pulse length

Block Diagram

Semiconductor Group

TCA 785

Pulse Diagram

Semiconductor Group

TCA 785

Absolute Maximum Ratings

Parameter

Supply voltage Output current at pin 14, 15 Inhibit voltage Control voltage short-pulse circuit 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 Junction temperature Storage temperature Thermal resistance system - air

Operating Range

Supply voltage Operating frequency Ambient temperature

Limit Values
min.

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Datasheet ID: TCA785 638687