STMicroelectronics STNRG011 Digital Combo Multi-Mode PFC Controller

STMicroelectronics STNRG011 Digital Combo Multi-Mode PFC Controller and time-shift LLC resonant controller features a high-voltage double-ended controller for the LLC resonant half-bridge. The STNRG011 also features an 800V-rated startup generator and a sophisticated digital engine that manages optimal operation of three blocks. The device is housed in a 20-pin SO package and offers an advanced solution for powerfactor-corrected high-efficiency converters needing to comply with the most stringent energy-saving regulations.

STMicroelectronics STNRG011 Digital Combo Multi-Mode PFC Controller power system and control algorithms are managed by an 8-bit core with dedicated fast peripherals (SMED). Optimized digital algorithms together with HW analog IPs are implemented to guarantee a very high performance, BOM optimization and robustness. The digital algorithms are stored into an internal ROM memory, and all key application parameters are stored into a device's NVM (non-volatile memory) during the production phase, allowing wide configurability and calibration. The device externally communicates through a 2-pin UART, allowing the monitoring function, the black box storing into an external E2PROM, and the software patch upload from the external E2PROM.

Features

Digital combo multi-mode PFC + time-shift LLC resonant half-bridge controller
Onboard 800 V startup circuit, line sense, and X-cap discharge compliant with IEC 62368-1 for reduced standby power
Enhanced fixed on-time multi-mode TM PFC controller with input voltage feedforward, 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
Available in SO20 package