24-V AC Power Stage With Wide Vin Converter and Battery Backup Reference Design for Smart Thermostat

1 января 2018

The TIDA-01358 reference design provides a low BOM cost, high efficiency power stage solution for smart thermostats and other gateway building automation end equipment. This power stage takes a 24Vac input and produces a 5V and 3.3V output rail which can power additional point-of-load converters if added. The design provides LiPo battery charging and seamless switching to battery power during a 24Vac brownout. The power-path capability provides battery power assistance allowing system load transient to exceed the current limit of the 24Vac to DC system, allowing a lower cost Wide Vin buck to be utilized.

Особенности

Battery backup Independent battery charging and load path Dynamic power path/battery power assist High efficiency over entire load current range USB over-curent compliant