STMicroelectronics’ STNRG012 is an integrated and space-saving digital power controller with distortion mitigation that delivers an ideal solution for LED-lighting applications.
The device contains a multimode power-factor correction (PFC) controller, resonant half-bridge controller, and 800V startup circuit, managed by a digital engine. The PFC controller changes dynamically between transition mode, discontinuous-current mode (DCM), and valley skipping for optimum efficiency. The half-bridge controller executes ST’s patented time-shift control (TSC) for accurate soft switching.
With an input-voltage range up to 305VAC, the STNRG012 also operates from a DC supply targeting designs into both battery-powered and line-powered applications up to 300W.
The digital engine is hosted on an 8-bit core and performs optimized control algorithms. It manages the PFC and half-bridge circuits via high-speed state-machine event-driven (SMED) peripherals. Additional dedicated hardware IP blocks including a power manager and burst-mode engine ensure robust operation and minimise power consumption in idle mode. System safety features including surge protection and anti-capacitive protection for the half-bridge are built-in and managed by hardware to ensure fast action for superior reliability.