Texas Instruments high-voltage switch to help power-on smart meter and home automation to achieve energy-saving design

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Texas Instruments (TI) today announced a 700V switch that supports less than 100uA and the industry's lowest quiescent current, which is half the power of existing solutions, further strengthening TI's high-voltage power solutions for off-line AC/DC designs. camp. The UCC28880 controller is highly integrated with 700V power MOSFETs and high-voltage current supplies to help boost the overall energy efficiency of a normally-on, non-isolated power system with up to 100mA output current, and to meet the needs of smart meters, home automation equipment, and large appliances. . For more information, please visit

Dave Freeman, CTO of TI's High Voltage Power Solutions Products Division, said: "The world's hundreds of millions of smart meters measure energy usage and feed back to utilities by consuming grid power. Although these meters consume relatively little power. And the amount of electricity it consumes is not charged to the user, but the amount of energy required to power these devices is cumulatively discovered, and it is necessary to minimize this energy consumption. The latest power conversions such as TI's latest high-voltage power solutions Technology will help minimize the energy consumption of smart meters."

The UCC28880 high voltage transfer switch not only reduces system cost, but also minimizes overall power supply size while maintaining high efficiency and high system performance. Designers can use this switch to build different converter topologies such as buck, buck-boost, and reverse without adding additional semiconductor components.

Key features and benefits of the UCC28880:

· Lowest power consumption in the industry: quiescent current can be reduced to below 100uA due to reduced load;

· Reduced application size and overall system cost: The circuit is highly integrated with a 700V MOSFET , startup current supply, and internal current sensing in a 29.4mm square micro-small 7-pin SO package. In addition, since no external compensation is required, this further reduces the number of components and thus the board space;

Excellent system performance at excessive current: In addition to the current limit function, the controller's inductor current runaway protection also helps protect against load short-circuit conditions, ensuring design reliability;

· Overheat protection: This device provides over-temperature protection to support hysteresis restart to ensure safe operation;

· Higher creepage distances and gaps: The high voltage pins are isolated on one side of the package to maximize the gap between the high and low voltage pins.

The UCC28880-based off-line AC/DC reference design (PMP8550) not only helps designers quickly design overall solution sizes up to 38mm x 32mm x 22mm, but also features low-cost, low-power, non-isolated, high-side buck conversion In addition, it also supports 13V voltage, while also generating up to 100mA output current. This reference design uses an integrated switch buck converter for a wide range of industrial applications. Design schematics, CAD files, and test results are available for download.

Availability

The UCC28880 switch with integrated 700V FET is available now in a 7-lead SOIC package. The UCC28880 Low Side Buck Evaluation Board (EVM) and High Side Buck EVM contain downloadable PSpice models.

Learn more about TI's power management solutions:

· Learn more about TI's high voltage transfer switches;

· Read the TI Power Management blog "Power Home";

· Learn more about TI smart meters and home automation solutions;

· Consult the community power management forum through Texas Instruments online to help with questions and help solve technical challenges.