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STMicroelectronics STNRG011ATR
- Part No.:
- STNRG011ATR
- Manufacturer:
- STMicroelectronics
- Category:
- Power Management - Specialized
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
STNRG011ATR.pdf
- Description:
- DIGITAL COMBO MULTI-MODE PFC AND
- Quantity:
- Payment:
- Shipping:
Inventory:867
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Product details
Overview
STNRG011ATR from STMicroelectronics is a digital combo multi-mode PFC + time-shift LLC resonant half-bridge controller in SO20 package, integrating 800 V startup circuitry, line sensing, and X-cap discharge compliant with IEC 62368-1. It delivers fixed-on-time TM/DCM PFC control with input voltage feed-forward, THD optimization, and frequency limitation, plus burst-mode LLC control with fast transient response - deployed in flat-screen TV SMPS and open-frame AC-DC power supplies.
For engineers reviewing the STNRG011ATR datasheet, STNRG011ATR pinout, STNRG011ATR application, or STNRG011ATR equivalent, key selection considerations include its dual-loop digital architecture (PFC + LLC), 57–63.7 MHz system clock, UART-based configuration interface, integrated 8-bit core with SMED peripherals, and safety-compliant HV startup and X-cap discharge functionality.
Technical Context
The STNRG011ATR implements two independent state-machine event-driven (SMED) control engines: one for PFC (with RECOT, OC1/OC2, ZCD inputs) and one for LLC (with ZCD, OVP, BURST inputs), both synchronized to a 57–63.7 MHz internal clock and coordinated by an 8-bit microcontroller core. Analog comparators - programmable via NVM - provide real-time threshold detection for protection and zero-crossing events.
Its architecture integrates a multichannel ADC (10-bit resolution, 0–1.5 V / 0–2.5 V FSR ranges), dedicated 16×16 MAC unit, and power management engine handling brown-in/out (112–116 V / 108 V thresholds), surge stop (430 V detection), and X-cap discharge (≥4 mA, ≥50 ms inactivity timeout), all operating under IEC 62368-1 compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Architecture | Digital combo PFC + time-shift LLC with 8-bit core and dual SMED engines for independent loop execution |
| System Clock | 57–63.7 MHz - enables high-resolution timing for COT PFC and sub-100 ns gate-drive edge control |
| PFC Modes | Transition-mode (TM) and discontinuous conduction mode (DCM) - supports wide input range and low-load efficiency |
| Startup Voltage | 800 V-rated HV startup on VAC pin - eliminates external startup resistor network and reduces standby power |
| X-Cap Discharge | Integrated 4 mA discharge current with 50 ms inactivity timeout - meets IEC 62368-1 safety requirements without external circuitry |
| Communication Interface | 2-pin UART (TX/RX) - enables black-box logging, firmware patch upload, and real-time monitoring via external EEPROM |
| ADC Resolution | 10-bit SAR ADC with programmable sampling scheduler - supports simultaneous voltage/current sensing for PFC and LLC loops |
Pinout & Package
STNRG011ATR is housed in a 20-pin SOIC (SO20) package with creepage-enhancing NC pins (pins 4 and 19) for high-voltage isolation. The layout separates signal ground (SGND), power ground (PGND), and floating ground (FGND) to minimize noise coupling in mixed-signal operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BOOT | High-side gate-drive floating supply | Connects bootstrap capacitor to FGND; enables high-side MOSFET drive without isolated supply |
| 2 HVG | High-side gate-driver output | 0.5 A source / 0.75 A sink peak current - drives upper LLC half-bridge MOSFET directly |
| 3 FGND | High-side floating ground reference | Return path for HVG current; requires tight PCB layout to suppress switching node spikes |
| 5 LVG | Low-side gate-driver output | 0.5 A source / 0.75 A sink peak current - drives lower LLC MOSFET with active pull-down during UVLO |
| 6 TX / 7 RX | UART communication interface | Enables configuration, diagnostics, and firmware updates without JTAG or additional hardware |
| 8 LLC_CS | LLC tank current sense input | Accepts capacitive-divider voltage for zero-crossing detection and dual-level OCP (500 mV / 700 mV thresholds) |
| 11 PFC_ZCD | PFC inductor demagnetization sense | Detects PFC ZCD with programmable thresholds (0–200 mV falling, 110–310 mV rising) for precise COT timing |
| 12 PFC_CS | PFC MOSFET current sense | Supports enhanced COT control and overcurrent protection with 500 mV / 900 mV dual-threshold detection |
| 13 PFC_FB | PFC output voltage feedback | Closes PFC voltage loop and provides OVP at 2.33 V with 75 mV hysteresis |
| 17 PFC_GD | PFC gate-driver output | 0.7 A source / 0.8 A sink peak current - drives PFC boost MOSFET with robust short-circuit capability |
| 18 VCC | Main IC supply input | 9.5–19 V operating range; internal clamp at 19 V; powers analog/digital sections and gate drivers |
| 20 VAC | High-voltage AC line interface | Direct mains connection (−1 to 800 V); enables startup, line sensing, brown-in/out, surge detection, and X-cap discharge |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 800 V startup generator | Eliminates external high-voltage resistor network and reduces no-load power consumption below 30 mW |
| Programmable NVM parameter storage | Stores calibration data, protection thresholds, and control loop coefficients during production - enables field-tunable performance |
| Time-shift LLC control algorithm | Adjusts LLC switching phase relative to resonant current zero-crossing - improves light-load efficiency and EMI profile |
| Dual-level OCP for PFC and LLC | Separate fast (OC1) and latched (OC2) overcurrent thresholds per stage - ensures robust fault handling without nuisance tripping |
| Line-adaptive burst-mode operation | Modulates burst frequency based on input voltage - maintains stable regulation across 90–264 Vac while minimizing audible noise |
Applications
| Flat-Screen TV SMPS | Open-Frame SMPS |
|---|---|
Use Scenario: 200–300 W primary-side controller for LED-backlit LCD/LED TVs requiring < 0.5 W standby and >92% full-load efficiency. IC Role / Device Role / Timing Role: Dual-loop digital controller managing PFC pre-regulation and LLC resonant conversion with synchronous soft-start and adaptive burst mode. Use Value: Meets Energy Star Tier 2 and EU CoC v5 standby requirements via integrated X-cap discharge and 800 V startup, reducing BOM count by 4 discrete components. |
Use Scenario: Industrial/open-frame 150–500 W AC-DC power supply for medical or test equipment needing IEC 62368-1 compliance and long-term reliability. IC Role / Device Role / Timing Role: Safety-certified digital controller providing PFC+LLC coordination, surge immunity (430 V), and brown-out recovery within 45 ms. Use Value: Enables single-chip compliance with reinforced insulation requirements through creepage-optimized SO20 layout and internal 20 MΩ line-sense divider. |
| ATX Power Supply | AC-DC Adapter |
Use Scenario: High-efficiency ATX main converter (3.3/5/12 V rails) targeting 80 PLUS Gold certification with dynamic load step response < 50 µs. IC Role / Device Role / Timing Role: Real-time digital controller executing PFC voltage loop and LLC current-mode control using 10-bit ADC samples triggered by SMED states. Use Value: Achieves < 1% output voltage deviation under 50% load step via fast transient burst-mode recovery and line-synchronized PFC modulation. |
Use Scenario: Compact 65–120 W adapter for laptops or monitors requiring compact design, low acoustic noise, and universal AC input (90–264 Vac). IC Role / Device Role / Timing Role: Integrated PFC+LLC controller with UART-configurable parameters enabling platform reuse across multiple output voltages. Use Value: Reduces adapter footprint by 25% versus dual-controller solutions while maintaining < 100 mV p-p ripple via time-shift phase control and THD-optimized PFC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital PFC+resonant LLC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28070A | Analog multi-phase PFC controller only; requires external LLC controller (e.g., UCC25630x) and separate MCU for coordination | Lacks integrated LLC control, UART interface, and X-cap discharge - needs ≥3 additional ICs for full function | Choose when legacy analog design infrastructure exists and digital configurability is not required |
| NCP1654 + NCP13992 | Discrete analog PFC (NCP1654) + analog LLC (NCP13992) pair; no shared digital core or NVM calibration | No unified protection coordination or line-synchronized timing - higher risk of loop interaction and slower transient response | Prefer for cost-sensitive designs where BOM count is secondary to unit cost and no firmware update capability is needed |
Compared with UCC28070A and NCP1654+NCP13992, STNRG011ATR consolidates PFC+LLC control, safety functions, and configuration into one SO20 IC - reducing component count by ≥4, enabling field calibration via UART, and guaranteeing coordinated protection response under surge/brown-out conditions.
Availability
STNRG011ATR is available at Aetrix Electronics and suitable for flat-screen TV SMPS, open-frame industrial power supplies, and ATX main converters requiring stable component supply, long lifecycle support, and IEC 62368-1 safety compliance.
Supply support for STNRG011ATR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.
STNRG011ATR belongs to ST's STNRG digital power controller product line - engineered specifically for high-efficiency, safety-certified AC-DC conversion systems requiring integrated PFC+LLC control, programmable protection, and minimal external components.
FAQ
What is the purpose of the VAC pin beyond startup?
The VAC pin serves four critical real-time functions: (1) line voltage sensing for brown-in/out detection (112–116 V / 108 V thresholds), (2) surge detection (430 V trigger), (3) X-cap discharge initiation after 50 ms of line inactivity, and (4) input voltage feed-forward for PFC modulation. Its internal 20 MΩ divider enables all these without external components.
How does the STNRG011ATR achieve compliance with IEC 62368-1 for X-cap discharge?
STNRG011ATR meets IEC 62368-1 by integrating a dedicated 4 mA discharge current path activated automatically when AC line activity ceases for ≥50 ms. This internal HV DMOS discharges X-capacitors (0.1–2.2 µF) through a series resistor (20–100 Ω) without external circuitry - verified per Table 5 in DS13973 Rev 2.
Can the PFC and LLC control loops operate independently?
Yes - the STNRG011ATR uses two independent State Machine Event Driven (SMED) engines: one for PFC (driven by PFC_ZCD, PFC_CS, PFC_RECOT) and one for LLC (driven by LLC_CS, LLC_AUX, LLC_FB). Each has dedicated comparators and timers, allowing asynchronous operation while sharing the same 8-bit core for loop calculations and coordination.
What UART capabilities does the STNRG011ATR support?
The STNRG011ATR supports full-duplex UART communication on pins 6 (TX) and 7 (RX) at configurable baud rates. It enables black-box logging of fault events to external EEPROM, patch uploads for firmware updates, real-time monitoring of ADC readings (line voltage, temperature, currents), and read/write access to internal NVM for calibration data - all without requiring external debug hardware.
STNRG011ATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- AC-DC Adapter, LCD & PDP TV, Telecom SMPS
- Current - Supply:
- 500µA
- Voltage - Supply:
- 9.5V ~ 19V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
STNRG011ATR FAQ
1.How can I place an order for STNRG011ATR through Aetrix?
Please submit a Request for Quotation (RFQ) for STNRG011ATR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STNRG011ATR reliable?
The price and inventory of STNRG011ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STNRG011ATR is usually 5 days.
3.What payment methods are accepted for STNRG011ATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STNRG011ATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STNRG011ATR?
STNRG011ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STNRG011ATR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STNRG011ATR?
For technical support, including STNRG011ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STNRG011ATR requirements.
6.How does Aetrix verify that STNRG011ATR is sourced from the original manufacturer or authorized distributors?
All STNRG011ATR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STNRG011ATR meets industry standards.
7.What is the process for return or replacement of STNRG011ATR?
All STNRG011ATR units undergo pre-shipment inspection (PSI). If there is an issue with STNRG011ATR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STNRG011ATR part is unused and in its original packaging.
Return procedure for STNRG011ATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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