Off-line (non-isolated) AC/DC power supply architectures reference design for grid applications
Description
This reference design showcases three non-isolated AC/DC power supply topologies for line-powered applications such as residential circuit interrupters: circuit breakers: home automation equipment and appliances for Off-line switcher using inductorAC line regulator using switched capacitor (active-clamped capacitor-drop based power supply)Capacitive-drop regulator (cap-drop power supply)The trade-off between efficiency: start-up time and solution size is done across architectures for various input and output conditions. The design methodology: test data and comparison is included for system designers to quickly evaluate and customize their solution.
Features
- Off-line switcher using the UCC28880: High efficiency architecture using a buck converter simplifies the design covering universal input voltage – applications requiring fast startup (Switching capacitor-drop power supply using the TPS7A78: Inductor-less architecture customized for a narrow input voltage range – high efficiency solution for low current (Capacitor-drop (cap-drop) power supply using an LDO: Simplified solution with passive components and LDO – low-cost solution with low efficiency: high startup time and large footprint
Applications
- Electricity meter
- Wired control
- Residential breakers
- Grid asset monitoring
Product Categories
- Power management