STNRG328STR

Power Management - Specialized Overview

The STNRG328STR is a digital controller for STC/HSTC open-loop resonant converters from STMicroelectronics. It performs power conversion with an input voltage range of 40 V to 60 V and a programmable conversion ratio of 2:1 to 10:1. The device supports fixed duty cycle operation and a programmable frequency from 140 kHz to 300 kHz. It delivers output power ranging from 500 W up to 2 kW, achieving a peak efficiency of 98.4%. The component integrates a State Machine Event Driven (SMED) architecture, 32 Kbytes Flash, 1 Kbyte EEPROM, and 6 Kbytes RAM within a VFQFPN32 package.

Power Management - Specialized Feature Summary

• State Machine Event Driven (SMED) architecture implements control strategy and ensures Zero Current Detection (ZCD) for perfect LC resonance management.
• Supports wide conversion ratios from 2:1 to 10:1 to provide multiple output voltage options.
• Integrates peripherals including a 10-bit ADC, UART interface, I2C master, and GPIOs.
• Features memory with Read-While-Write (RWW) capability and Error Correction Code (ECC).

Power Management - Specialized Applications

• Server DC/DC intermediate bus generation
• STC/HSTC open loop resonant converter designs
• High-efficiency power conversion systems requiring wide input voltage ranges

Power Management - Specialized Procurement Notes

Verify the suffix 'STR' indicates tape and reel packaging when sourcing components. Confirm that the specific revision matches the required firmware compatibility for SMED implementation. Ensure the operating temperature range of -40°C to 105°C aligns with the target system environment. Cross-reference the pinout with the VFQFPN32 datasheet to guarantee correct board layout integration.

Power Management - Specialized Selection Notes

Select this controller for applications requiring high efficiency in resonant topologies. The integrated SMED core simplifies design by managing deadtime and switching frequency automatically. Consider the 40V to 60V input window and 2kW power capability when sizing the system. The inclusion of ECC and RWW memory features enhances reliability for complex control strategies.

Power Management - Specialized Part Context

The STNRG328STR belongs to the STNRG family of digital power controllers designed to simplify digital power conversion. This family utilizes the SMED high-resolution PWM generator alongside an STM8-based supervisory core. Other variants in the series include the STNRG288A with four outputs and the STNRG388A with six SMEDs, catering to different channel requirements.

Power Management - Specialized FAQ

How does the STNRG328STR manage switching frequency?

It uses the State Machine Event Driven (SMED) architecture to manage the switching frequency and deadtime, ensuring Zero Current Detection (ZCD) for optimal LC resonance regardless of external component variations.

What memory specifications are included in the STNRG328STR?

The device includes 32 Kbytes of Flash program memory, 1 Kbyte of true data EEPROM, and 6 Kbytes of RAM. Both Flash and EEPROM support Read-While-Write (RWW) and Error Correction Code (ECC).