STNRG328S

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Digital controller for STC/HSTC topologies

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Product overview

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.

It’s 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.

  • All 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
      • I2C 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 1000 cycles at 55 °C
      • Data memory: 1 Kbyte true data EEPROM; data retention: 20 years at 55°C after 1000 cycles at 85 °C
      • RAM: 6 Kbytes
    • Operating temperature: -40 °C up to 105 °C
    • Package: VFQFPN32 5x5 mm

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STNRG328S
Active
VFQFPN 32 5x5x1.0 mm Industrial Ecopack2
STNRG328STR
Active
VFQFPN 32 5x5x1.0 mm Industrial Ecopack2

STNRG328S

Package:

VFQFPN 32 5x5x1.0 mm

Material Declaration**:

Marketing Status

Active

Package

VFQFPN 32 5x5x1.0 mm

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STNRG328STR

Package:

VFQFPN 32 5x5x1.0 mm

Material Declaration**:

Marketing Status

Active

Package

VFQFPN 32 5x5x1.0 mm

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors