Overview
The UAA2016DG, produced by onsemi, is a Zero Voltage Switch Power Controller designed to drive triacs using the Zero Voltage technique. This technique enables RFI-free power regulation of resistive loads. The device operates directly on the AC power line and is primarily used for the precision regulation of electrical heating systems, such as panel heaters and clothes irons.
It features a built-in digital sawtooth waveform that allows for proportional temperature regulation over a ±1°C band around the set point. Additional features include programmable temperature reduction, preset temperature (defrost) application, sensor failsafe, and adjustable hysteresis, all implemented with a very low external component count.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Device Operating Temperature Range | −20 to +85 | °C |
| Package Type | SOIC-8 | |
| Pb-Free Indicator | Yes | |
| Maximum Supply Voltage (VCC) | See datasheet for detailed voltage ratings | V |
| Maximum Output Current (I_D) | Dependent on external resistor Rout | mA |
| Output Pulse Width | Adjustable, typically 50 μs to 200 μs | μs |
| Synchronization Resistor Range | See application curves for specific values | kΩ |
| Temperature Reduction Range | Up to 5°C | °C |
Key Features
- Zero Voltage Switch for Triacs, up to 2.0 kW (MAC212A8)
- Direct AC Line Operation
- Proportional Regulation of Temperature over a ±1°C Band
- Programmable Temperature Reduction
- Preset Temperature (i.e., Defrost) Application
- Sensor Failsafe
- Adjustable Hysteresis up to 5°C
- Low External Component Count
Applications
- Precision Regulation of Electrical Heating Systems
- Panel Heaters
- Clothes Irons
Q & A
- What is the primary application of the UAA2016DG?
The primary application is the precision regulation of electrical heating systems such as panel heaters and clothes irons.
- How does the UAA2016DG regulate temperature?
It uses a built-in digital sawtooth waveform to allow for proportional temperature regulation over a ±1°C band around the set point.
- What safety features does the UAA2016DG include?
The device includes a sensor failsafe that inhibits output pulses when the sensor connection is broken.
- Can the hysteresis of the UAA2016DG be adjusted?
Yes, the hysteresis can be adjusted up to 5°C around the set point.
- What is the operating temperature range of the UAA2016DG?
The device operates within a temperature range of −20°C to +85°C.
- Is the UAA2016DG available in Pb-free packages?
Yes, Pb-free packages are available.
- How is the output pulse width of the UAA2016DG adjusted?
The output pulse width is adjustable via the synchronization resistor connected on Pin 8.
- What is the purpose of the programmable temperature reduction feature?
This feature is designed for energy savings by allowing a programmable reduction in temperature.
- Can the UAA2016DG be used for defrost applications?
Yes, it supports preset temperature (defrost) applications.
- How does the UAA2016DG ensure noise immunity?
The device features good noise immunity through its voltage reference and comparator hysteresis, minimizing the effect of noise on the comparator input.
