ST's wide portfolio of pulse-width modulator (PWM) controllers can support isolated and non-isolated AC-DC and DC-DC switch mode power supplies based on the most popular topologies in both single-ended (such as fly-back, forward or quasi-resonant) and double-ended configurations (such as asymmetrical half-bridge) for mid- to high-power SMPS.

Our offer includes a number of advanced and digital controllers, featuring innovative solutions to optimize converter efficiency in a wide range of load conditions and especially at light loads such as for high voltage start-up. These controllers also integrate a comprehensive set of protections for enhanced robustness and reliability even in an extended temperature range for outdoor applications. The result is a reduction in the number of external components, minimizing converter size and cost.

The industry standard controllers of the UC (voltage mode) and SG (current mode) series are also available for more mainstream SMPS designs.


Highly Integrated Digital-Power Controller Streamlines Design to Latest Efficiency and Safety Standards

STNRG011 is ST’s new digital controller integrating multi-mode PFC, resonant LLC and analog peripherals allowing a smooth transition from analog to digital in medium power SMPS

  • Fast and easy digital design
    Fully configurable through GUI, does not require writing any firmware
  • Lower part count
    800 V start-up, line sense and Xcap discharge integration
  • Maximum efficiency
    Compliancy with major energy directives: ENERGY STAR® for computers ver. 6.1 , EU Code of Conduct (CoC) Tier 2 and more with < 100mW energy consumption at no-load
  • Fast dynamic performance and easy compensation
    Time Shift LLC control
  • High reliability and safety
    Complete set of protection functions and integrated X-cap discharge for compliance with IEC 62368-1
  • Flexibility and connectivity
    Power monitoring and black box recording by UART/ I2C
  • Low pin count: SO20 package

Achieve the highest performances with minimized complexity

STNRG digital controllers for power conversion

No need to deep-dive into DSP complexity to grasp all the advantages of digitally-implemented switched-mode converters.  STNRG digital controllers help designers obtain higher efficiency and enhanced safety in mid- and high-power converters for industrial switched-mode power supplies (SMPS), solar-power converters or charging stations for electric vehicles (EV).

STNRG digital controllers are based on the combination of event-driven state machine (SMED), high-resolution pulse-width modulation (PWM) generators triggered by internal and external events, such as peak current, over current or zero crossing, that handle time-critical tasks in the converter’s control loop and an STM8-based core dedicated to supervisory tasks.

STNRG digital controllers can be selected in three options six (STNRG388A, TSSOP38 package), five (STNRG328A, VFQFPN32) or four (STNRG288A, TSSOP28) SMEDs to fit different power converter architectures.





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