STNRG328S STMicroelectronics

STNRG328S Datasheet Digital controller for STC/HSTC topologies Features Digital controller for STC/HSTC topologies Support wide conversion ratio from 2:1 to 10:1 to provide several Vout State Machine Event Driven (SMED) to implement key control features: Current limit in combination with Hot swap controller Operating input voltage window Conversion ratio control PWM frequency and deadtime management to guarantee ZCD function Soft-start control Driver management Temperature control Typical application: Server DC/DC intermediate bus generation from 40 V to 60 V input voltage, 200 W to 2 kW output power range Peripherals 10-bit ADC UART interface 2 I C master fast/slow speed rate GPIOs Memory Flash and EEPROM with read-while-write (RWW) and Error Correction Code (ECC) Program memory: 32 Kbytes Flash data retention: 20 years at 55 C after Product status link 1000 cycles at 55 C STNRG328S Data memory: 1 Kbyte true data EEPROM data retention: 20 years at 55C after 1000 cycles at 85 C Product label RAM: 6 Kbytes Operating temperature: -40 C up to 105 C Package: VFQFPN32 5x5 mm Description The STNRG328S is a digital controller for STC/HSTC open loop resonant converter from STMicroelectronics. It performs a power conversion from an input voltage in a typical range of 40 V to 60 V to an output voltage with a programmable conversion ratio from 2:1 to 10:1 with fixed duty cycle and programmable frequency from 140 kHz to 300 kHz. Its able to deliver an output power in the range from 500 W up to 2 KW with very high efficiency in wide load range and with efficiency peak of 98.4% . A State Machine Event Driven (SMED) implements the control strategy to ensure all the STC/HSTC control functions, in particular the ZCD (Zero Current Detection) feature allows a management of the deadtime and the switching frequency in order to achieve the perfect LC resonance and top efficiency independently from the external component variations. The STNRG328S firmware is specifically designed to program the SMED and implement the control strategy. DS13809 - Rev 1 - September 2021 www.st.com For further information contact your local STMicroelectronics sales office. STNRG328S STC typical application 1 STC typical application Figure 1 shows a typical STC application for 4:1 conversion ratio. The STNRG328S works in companion with STPRDC02A gate drivers designed for STC applications, and a hot-swap circuit (typically an e-fuse) to avoid damages during hot plug-in of the input 48 V bus. Figure 1. STC typical application DS13809 - Rev 1 page 2/36