Part Number: TCA780
Function: Phase Control IC
Package: DIP 16 Pin Type
Manufacturer: Siemens AG
Image and Pinouts:
Description
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. TCA785 IC replaces the previous types TCA780 and TCA780 D.
Functional Description
The synchronization signal is obtained via a high-ohmic resistance from the line voltage (voltageV5). A zero voltage detector evaluates the zero passages and transfers them to the synchronization register.
This synchronization register controls a ramp generator, the capacitorC10of which is charged by a constant current (determined byR9). If the ramp voltageV10exceeds the control voltage V11(triggering angleϕ), a signal is processed to the logic. Dependent on the magnitude of the control voltageV11, the triggering angleϕcan be shifted within a phase angle of 0˚ to 180˚.
Features
1. Reliable recognition of zero passage
2. Large application scope
3. May be used as zero point switch
4. LSL compatible
5. Three-phase operation possible (3 ICs)
6. Output current 250 mA
7. Large ramp current range
8. Wide temperature range
TCA780 Datasheet PDF Download
Similar features and reference parts
TCA780 Replace TCA785 : [ Infineon-TCA785-siemens.PDF ]