STNRG011A STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
STNRG011A is a digital combo multi-mode PFC and time-shift LLC resonant controller in a 20-pin SOP package for high-efficiency SMPS designs. Operates from 9.5 V to 19 V Vcc with current-mode control for AC-DC adapters and server power supplies above 100 W. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- STNRG011A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.6300(MOQ 1000)
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Combined digital PFC and time-shift LLC resonant controller in one IC, replacing two analog controllers to reduce BOM count and PCB area
- Multi-mode PFC operation (CCM, DCM, burst) with automatic mode transitions for high efficiency from 10% to 100% load across AC line 90–265 V
- Time-shift LLC control with variable frequency and phase-shift for soft-switching ZVS operation, achieving above 95% efficiency at full load
- Current-mode control with 9.5 V to 19 V Vcc operating range and integrated gate drivers for both PFC boost and LLC half-bridge switches
- Digital control core enabling adaptive dead-time, feed-forward compensation, and fast transient response in server PSU and LED driver topologies
Applications
STNRG011A is designed for high-efficiency AC-DC power conversion in server power supplies, telecom rectifiers, and industrial adapters typically above 100 W where combining PFC boost and LLC resonant stages with a single controller reduces design complexity and meets 80 PLUS Platinum efficiency levels. Its multi-mode PFC automatically transitions between CCM and burst modes to maintain high power factor above 0.99 at full load while reducing switching losses at light load below 20%. The integrated time-shift LLC control with ZVS soft switching also benefits LED street light drivers and high-density laptop adapters requiring compact thermal design without large heatsinks.
Specifications
| Factory Lead Time | 20Weeks |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Input Voltage-Max | 19V |
| Input Voltage-Min | 9.5V |
| Input Voltage-Nom | 15V |
| JESD-30 Code | R-PDSO-G20 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Surface Mount | YES |
| Switching Frequency-Max | 50kHz |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.39.00.50 |
| Country of Origin | Philippines |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for STNRG011A:
Frequently Asked Questions
What two power conversion stages does STNRG011A control, and how does combining them save board space?
STNRG011A simultaneously controls a PFC boost stage and a time-shift LLC resonant stage from a single 20-pin SOP IC, replacing two separate analog controllers and their associated compensation networks, which typically saves 30% of controller subsystem PCB area in a 300 W server power supply design.
What Vcc input voltage range does STNRG011A support, and what bias supply is typically used?
STNRG011A operates from a 9.5 V minimum to 19 V maximum Vcc with a 15 V nominal, supplied from an auxiliary flyback winding or a dedicated low-power bias regulator on the AC-DC converter; this range is compatible with standard 12 V and 15 V gate driver bias rails used in server PSU designs above 100 W.
How does STNRG011A achieve high efficiency at light load in server power supplies?
STNRG011A automatically transitions the PFC stage into discontinuous conduction mode (DCM) and burst mode below approximately 20% load, reducing switching losses at idle and enabling compliance with the 80 PLUS Titanium requirement of above 90% efficiency at 10% load while maintaining power factor above 0.9 at 50% load.
What switching topology does STNRG011A use for the resonant stage, and what is the efficiency benefit?
The resonant stage uses a time-shift LLC half-bridge topology with variable switching frequency and phase-shift control that achieves zero-voltage switching (ZVS) for both primary switches across the full load range from 10% to 100%, enabling converter efficiency above 95% at 230 V AC input in 200 W to 500 W adapter designs.
For a 300 W industrial adapter, how does STNRG011A compare to using separate PFC and LLC controllers?
STNRG011A replaces two discrete analog ICs with coordinated digital PFC-LLC control in one 20-pin SOP, reducing the controller solution from approximately 40 components to under 25 components while enabling adaptive dead-time compensation that a fixed-frequency analog LLC controller cannot provide, cutting design time by weeks and improving EMI margin by 3 dB to 6 dB at the 150 kHz switching frequency.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1000+ | $1.6500 | $1650.00 |
| 2000+ | $1.6300 | $3260.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”