STNRG012TR

Overview

The STNRG012TR is a digital combo multi-mode PFC and time-shift LLC resonant half-bridge controller designed for AC and DC input lines. It integrates an 8-bit core with dedicated fast peripherals (SMED), an on-board 800 V start-up circuit, and line sense capabilities. The device supports Transition-Mode and DCM PFC control with input voltage feed-forward, THD optimization, and frequency limitation. It features complete protection sets for both PFC and the half-bridge, including brownout protection. Key parameters include a switching frequency of 15 MHz, an operating temperature range of -40°C to +150°C (TJ), and a supply voltage range of 9.5V to 19V. It is housed in a 20-SOIC package.

Feature Summary

• Digital combo integration of multi-mode PFC and time-shift LLC resonant half-bridge controllers managed by an optimized digital engine.
• Supports both AC and DC input lines with an on-board 800 V start-up circuit and line sensing functionality.
• Enhanced fixed-on-time multi-mode TM PFC controller featuring input voltage feed-forward, THD optimizer, and frequency limitation.
• External communication capability via a 2-pin UART for monitoring, black box storage, and software patch uploads.

Applications

• Professional lighting systems requiring compliance with stringent energy saving regulations
• High-efficiency power-factor-corrected converters for AC and DC input applications
• Advanced AC-DC adapters utilizing LLC resonant half-bridge topologies

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Ensure compatibility with the required NVM programming tools if factory calibration is needed. Confirm that the 20-SOIC footprint matches the target PCB design. Validate thermal management requirements given the wide operating temperature range. Check for any specific RoHS or REACH compliance declarations relevant to the procurement region.

Selection Notes

Select this component when designing high-efficiency converters that must handle both AC and DC inputs while meeting strict harmonic distortion standards. The integrated digital engine allows for flexible configuration via NVM, reducing BOM complexity compared to discrete solutions. Consider the 800 V start-up circuit for simplified high-voltage biasing. The UART interface enables advanced diagnostics and field updates, suitable for applications requiring remote monitoring or firmware maintenance.

Part Context

The STNRG012 belongs to STMicroelectronics' digital combo controller family, which combines PFC and resonant control in a single package. It utilizes an 8-bit core with SMED peripherals for robust performance. Unlike analog-only counterparts, it offers programmable algorithms stored in ROM and configurable parameters in NVM. This approach optimizes performance across varying load conditions while maintaining low standby power consumption.

Replacement Considerations

STNRG011TR: Similar digital combo controller but lacks the specific AC/DC dual-input optimization found in the STNRG012.

FAQ

How does the STNRG012 manage input voltage variations?

It employs an enhanced fixed-on-time multi-mode TM PFC controller with input voltage feed-forward to maintain stable operation across varying line conditions.

What communication interface is available for external monitoring?

The device includes a 2-pin UART interface that allows for real-time parameter monitoring, fault history logging, and software patch uploads from external flash memory.