AC-DC linear regulator

29 May 2019 Power Electronics / Power Management

Texas Instruments expanded its portfolio of linear regulators by introducing the TPS7A78, which uses a unique switched-capacitor architecture to eliminate discrete components, including external inductors and transformers and miniature circuit breakers and interrupters, for tamper-resistant designs in applications including electronic metering in grid infrastructure and building automation. The chip is a non-isolated linear regulator that delivers up to 0,5 W from AC to DC with smaller, fewer components. This design optimises regulation through an active bridge, switch capacitor and integrated low-dropout regulator (LDO). This results in higher efficiency and a reduced capacitor size compared to linear regulators in traditional capacitor-drop solutions utilising a Zener diode.

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