Texas Instruments (TI) has introduced a 700V switch that delivers less than 100µA of quiescent current, setting a new industry benchmark for low power consumption. This innovative component is designed to significantly reduce power usage—cutting it in half compared to existing solutions—thereby enhancing TI’s high-voltage power offerings for off-line AC/DC applications. The UCC28880 controller is highly integrated, combining a 700V MOSFET and a high-voltage current supply to improve energy efficiency in normally-on, non-isolated power systems with up to 100mA output current. It is ideal for smart meters, home automation devices, and large appliances.
Dave Freeman, CTO of TI’s High Voltage Power Solutions Division, emphasized the importance of minimizing energy use in smart meters: “With hundreds of millions of smart meters worldwide, even small power consumption adds up over time. TI’s latest high-voltage power technologies help reduce this energy demand, making them essential for sustainable energy management.â€
The UCC28880 not only lowers system costs but also reduces the overall size of the power supply while maintaining high efficiency and performance. Engineers can use this switch to build various converter topologies such as buck, buck-boost, and reverse without adding extra semiconductor components.
Key features of the UCC28880 include:
- **Industry-leading low power consumption**: Quiescent current can be reduced below 100µA, improving efficiency in low-power applications.
- **Compact design and cost-effective**: Integrated with a 700V MOSFET, startup current supply, and internal current sensing in a 29.4mm², 7-pin SO package. No external compensation is needed, reducing component count and board space.
- **Excellent performance under heavy load**: Includes inductor current runaway protection to prevent damage during short-circuit conditions.
- **Overtemperature protection**: Features hysteresis-based restart to ensure safe operation in high-temperature environments.
- **Increased creepage and clearance**: High-voltage pins are isolated on one side of the package, maximizing the distance between high and low voltage pins.
The UCC28880-based off-line AC/DC reference design (PMP8550) supports compact designs up to 38mm x 32mm x 22mm. It offers low-cost, low-power, non-isolated, high-side buck conversion, supporting 13V input and delivering up to 100mA output. The design includes a wide range of industrial applications and provides downloadable schematics, CAD files, and test results.
The UCC28880 with an integrated 700V FET is now available in a 7-lead SOIC package. Evaluation boards (EVM) for both low-side and high-side buck configurations come with downloadable PSpice models.
Explore more about TI’s power management solutions:
- Discover more about TI’s high-voltage transfer switches.
- Read the TI Power Management blog “Power Home.â€
- Learn about TI’s smart meter and home automation solutions.
- Join the TI online community forum for technical support and discussions.
Whether you're designing for smart meters, home automation, or industrial applications, the UCC28880 offers a powerful and efficient solution that meets modern energy demands.
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