About UsNew Single-Chip Digital-Power Controller for LED Lighting
The STMicreoelectronics STNRG012 contains a power-factor correction controller, resonant half-bridge controller, and 800V startup circuit in a single IC
STMicroelectronics have released the new STNRG012, a highly integrated and space-saving digital power controller with advanced distortion mitigation that delivers the perfect solution for LED-lighting applications.
The STNRG012 incorporates a multimode power-factor correction (PFC) controller with a resonant half-bridge controller, and a 800V startup circuit, all managed by a digital control 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.
The digital engine is hosted on an 8-bit core and performs optimized control algorithms. The digital controller manages the PFC and half-bridge circuits via high-speed state-machine event driven peripherals. Additional dedicated hardware IP blocks including a power manager and burst-mode engine ensure robust operation and minimize power consumption in idle mode. System safety features including surge protection and anti-capacitive protection for the half bridge are built in, managed by hardware to ensure fast action with superior reliability.
The STMicroelectronics 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 reduces the external components traditionally used for configuration, reducing the bill of materials and circuit size. A UART port for monitoring and communication simplifies testing and enables real-time supervision for exceptional reliability.
Features of the STNRG011A Digital Power Combination Controller include:
- Digital combo multi-mode PFC + time-shift LLC resonant half-bridge controller
- Onboard 800 V startup circuit, line sense and X-cap discharge
- Enhanced fixed on time multi-mode TM PFC controller with input voltage feed-forward, THD optimizer and frequency limitation
- Complete set of PFC protections
- Time-shift control of resonant half-bridge
- Enhanced burst-mode at light load with fast transient response and line adaptive half- bridge brown-out protection
- Complete set of half-bridge protections
More information on the STNRG011A Digital Power Controller is available on the ST website at STMicroelectronics STNRG011A product page.
The STMicroelectronics website address is www.st.com
[Reprinted with kind permission from STMicroelectronics - Release Date, 21st December, 2022]