The TDA1023/T is a bipolar integrated circuit from Philips Semiconductors for controlling triacs in a proportional time or burst firing mode. It allows precise temperature control of heating equipment and 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.
The TDA1023 is a bipolar integrated circuit designed to control triacs in a proportional time or burst firing mode. It permits precise temperature control of heating equipment, such as panel heaters, by generating positive-going trigger pulses that comply with regulations regarding mains waveform distortion and RF interference.
The device features adjustable parameters including the width of the proportional range, hysteresis, trigger pulse width, and repetition timing for firing bursts. It includes a fail-safe operation mode and provides a stabilized supply voltage for an external temperature bridge.
| Supply voltage (VCC) | -13.7 V |
|---|---|
| Stabilized supply voltage (VZ) | -8 V |
| Supply current (average) | -10 mA |
| Trigger pulse width | -200 µs |
| Firing burst repetition time (typical) | -41 s |
| Output current (max) | 150 mA |
| Operating ambient temperature range | -20 to +75 °C |
It is especially suited to the control of panel heaters for precise temperature control.
The generated pulses coincide with the zero excursions of the mains voltage.
The device has a built-in hysteresis of 20 mV.