EVLSTNRG-170W:170W SMPS with digitally controlled PFC and resonant LLC stage using STNRG388A

The EVLSTNRG-170W evaluation board is intended for evaluating the STNRG388A digital controller in off-line power conversion applications such as digital industrial power supplies.

The solution implements a PFC stage followed by a resonant LLC stage supporting up to 170 W. The application supports multiple output rails: a high power 24 V (6 A) channel for the main application, 1 auxiliary 12 V (2 A) for the controller and an always-on 5 V (2 A) standby.

The STNRG388A power conversion dedicated peripherals (SMEDs) offer the flexibility to drive the PFC in transition mode (DCM-CCM boundary) while the resonant LLC is controlled with timeshift control (TSC). In parallel to managing the two conversion stages, STNRG388A guarantees all the protections required by the application as well as implementing the advanced Anti Capacitive protection.

Thanks to the digital core of STNRG388A, it is also possible to monitor, control and debug the EVLSTNRG-170W board via a convenient HyperTerminal control.

Key Features

  • Digital controller: STNRG388A
  • Enhanced constant ON Time PFC
  • Timeshift controlled LLC
  • Max. power: 170 W
  • Efficiency: more than 91% at full load
  • Standby consumption: <150 mW with 50 mW secondary side load
  • Input voltage range: from 90 to 264 Vdc
  • Multiple output rails: 24 V (6 A), 12 V (2 A), 5 V (2 A)
  • Modular power and control board
Product Specifications
DescriptionVersionSize
DB2597: 170 W SMPS with digitally controlled PFC and resonant LLC stage based on the STNRG388A1.0598 KB
Application Notes
DescriptionVersionSize
AN4338: EVLSTNRG-170W: 170 W SMPS with digitally controlled PFC and resonant LLC stage based on the STNRG388A2.03 MB
User Manuals
DescriptionVersionSize
UM1881: EVLSTNRG-170W: user interface manual1.0491 KB
Bill of Materials
DescriptionVersionSize
EVLSTNRG-170W BOM29 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Sample & Buy
Part NumberCore ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
EVLSTNRG-170WSTNRG388A352.81-NECEAR99-
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
EVLSTNRG-170WCARDIndustrialEcopack1
170 W SMPS with digitally controlled PFC and resonant LLC stage based on the STNRG388A EVLSTNRG-170W
EVLSTNRG-170W: 170 W SMPS with digitally controlled PFC and resonant LLC stage based on the STNRG388A EVLSTNRG-170W
EVLSTNRG-170W: user interface manual EVLSTNRG-170W
EVLSTNRG-170W: user interface manual EVLSTNRG-170W
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2