Description

The STNRG011A embodies a multi-mode (transition-mode and DCM) PFC controller, a high- voltage doubleended controller for the LLC resonant half-bridge, an 800 V-rated startup generator and a sophisticated digital engine, that manage optimal operation of three blocks.

The STNRG011A manages only input line AC. The device comes in a 20-pin SO package and offers an advanced solution for power- factor-corrected highefficiency converters supposed to comply with the most stringent energy saving regulations. The power system and the 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 can be stored into a device's NVM (non-volatile memory) memory during the production phase allowing wide configurability and calibration. The device can also externally communicate 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

Applications

• Open frame SMPS

• Flat screen TV SMPS

• ATX power supply

• AC-DC adapter