STMicroelectronics has extended its digital power controller family with the introduction of the STNRG011A. The new digital power combination controller for 90-W to 300-W power supplies offers enhanced overload management for accurate output-voltage regulation when overcurrent protection is active.
(Source: STMicroelectronics)
Compared to the existing STNRG011, the STNRG011A increases the switching frequency when overcurrent protection is triggered thanks to its new overload-management algorithm. “In addition to maintaining output-voltage regulation, this also prevents unwanted shutdown of the power supply,” said ST.
The STNRG011A integrates a power-factor correction (PFC) controller, LLC resonant half-bridge controller, 800-V startup circuitry, and supervisory engine. The device is designed for power adapters, chargers, and television and lighting power supplies.
The enhanced features of the multi-mode PFC controller include input-voltage feedforward, a distortion optimizer, and frequency limitation. The digital supervisory engine features an 8-bit core and dedicated peripherals. The digital algorithms are stored in internal ROM for reliability.
Other features include on-chip non-volatile memory for storing configuration parameters and calibration data, which is said to reduce the number of external components and enables customization of the device, and a 2-pin UART port for monitoring and communication, which simplifies testing and provides real-time supervision and remote management. The devices also incorporate PFC and half-bridge protection and X-capacitor discharge circuitry compliant with IEC 62368-1 to help minimize standby power.
The STNRG011A, housed in a SO20 package, is in production. It is priced from $2.08 in quantities of 1,000.
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