STMicroelectronics' STNRG012 is a highly integrated, space-saving digital power controller with advanced distortion mitigation that offers an ideal solution for LED lighting applications.
The device contains a multimode power factor correction (PFC) controller, a resonant half-bridge controller, and an 800V initiating circuit, all managed by a digital engine. The PFC controller dynamically switches between transition mode, discontinuous current mode (DCM) and valley jump for optimal efficiency. The half-bridge controller performs ST's patented Time Shift Control (TSC) for precise smooth switching.
With an input voltage range of up to 305 VAC, the STNRG012 also operates from a design-oriented DC supply in battery-powered and line-powered applications up to 300 W.
The digital engine is hosted on an eight-bit core and runs optimized control algorithms. It manages the PFC and half-bridge circuits through SMED (High Speed State Machine Event Driven) peripherals. Additional dedicated hardware IP blocks, including a power manager and burst mode mechanism, ensure robust operation and minimize power consumption in idle mode.
System safety features, including surge protection and half-bridge anti-capacitive protection, are integrated and managed by hardware to ensure fast action and superior reliability.
The STNRG012 stores operating parameters and calibration coefficients on-chip in non-volatile memory, which allows users to customize settings and program the device during production. Digital programming also saves external components traditionally used for configuration, reducing bill of materials and circuit size.
A UART port for monitoring and communications simplifies testing and enables real-time supervision for greater reliability.