This document is about UAA2016 product, UAA2016 is a zero voltage switch power controller, which can drive triacs and use zero voltage technique to realize RFI-free power regulation, its main application is the precision regulation of electric heating systems, such as panel heaters or irons. A built-in digital sawtooth waveform permits proportional temperature regulation action over a ±1°C band around the set point. For energy savings there is a programmable temperature reduction function, and for security a sensor failsafe inhibits output pulses when the sensor connection is broken. Preset temperature (i.e. defrost) application is also possible. In applications where high hysteresis is needed, its value can be adjusted up to 5°C around the set point. All these features are implemented with a very low external component count.
The UAA2016 Zero Voltage Switch Power Controller is designed to drive triacs with a zero‑voltage technique for RFI‑free regulation of resistive loads such as panel heaters and irons. It offers proportional temperature regulation, programmable temperature reduction, sensor failsafe, adjustable hysteresis and a low external component count.
The document lists maximum ratings, electrical characteristics, functional circuit description, application guidelines, package dimensions and ordering information. It also details how to set temperature reduction, hysteresis and failsafe thresholds using external resistors.
| Maximum Load Power | 2.0 kW |
|---|---|
| Supply Current (Pin 5) ICC | 15 mA |
| Power Dissipation PD | 625 mW |
| Thermal Resistance (J‑A) | 100 °C/W |
| Operating Temperature Range | -20 °C to +85 °C |
The controller can drive loads up to 2.0 kW when used with a suitable triac.
Temperature reduction is set by the resistor R1 connected to Pin 4; the resistance value determines the reduction level.
The failsafe circuit inhibits output pulses when the temperature sensor connection is broken.
Hysteresis is adjusted by connecting an external resistor to Pin 2; leaving Pin 2 open gives 10 mV (0.15 °C) and connecting it to VCC gives up to 5 °C.