A Highly Integrated Digital-Power Controller for Adapters


In order to simplify and accelerate development of 90-300W power supplies and adapters for computers, LED lighting, medical equipment, telecom and industrial equipment, a digital power controller – STNRG011 has been launched meeting the updated and most stringent eco-design standards ( ENERGY STAR® requirements for computers ver. 6.1 and EU Code of Conduct (CoC) Tier 2).

STNRG011, flagged off by STMicroelectronics, combines a double-ended LLC resonant half-bridge controller and a multi-mode Power-Factor Correction (PFC) controller which is managed by a digital core running best-in-class control algorithms.

Integrated digital peripherals present in STNRG011 leverages ST’s SMED (state machine event driven) technology and its proprietary analogue hardware accelerates control-loop performance for an excellent dynamic response. Non-volatile memory is also provided on-chip for storing application-specific parameters.

STNRG011 digital control and user programmability will help engineers optimize efficiency and performance throughout the load range. It takes advantage of burst-mode operation at light loads to maximize efficiency. A 2-pin UART/I2C port enables a host system to monitor and manage the power supply.


Its additional integrated features include LLC and PFC gate drivers, high-voltage (800V) startup circuitry and line sensing. These further simplify design, increase reliability and ruggedness and reduce solution size and BOM.

It also has an X-capacitor discharge circuit that eases compliance with the new IEC 62368-1 safety standard for audio-visual and ICT equipment, which is taking over from 60950 and 60065 standards in the US and EU.

STNRG011 integrates comprehensive protection for the LLC and PFC circuitry, including over-voltage, over-current, under-voltage, surge, feedback-disconnection, anti-capacitive protection, brown-out protection, and soft-start.

It is available now as a 20-pin small-outline device and priced from $1.42 for orders of 1000 pieces.





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