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STMicroelectronics VIPERGAN50TR
- Part No.:
- VIPERGAN50TR
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 15-VQFN Exposed Pad
- Datasheet:
-
VIPERGAN50TR.pdf
- Description:
- HV CONVERTER EMBEDDING ADVANCED
- Quantity:
- Payment:
- Shipping:
Inventory:162
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Product details
Overview
VIPERGAN50TR from STMicroelectronics is a high-voltage quasi-resonant flyback controller integrating a 650 V E-mode GaN HEMT, embedded sense FET, and dynamic valley-synchronization logic. It delivers up to 50 W (85–265 VAC) with ZVS operation, <30 mW standby power, and multi-mode control (QR/valley-skip/foldback/burst). Used in fast-charger adapters for USB PD and USB-C devices requiring compact, high-efficiency offline AC-DC conversion.
For engineers reviewing the VIPERGAN50TR datasheet, VIPERGAN50TR pinout, VIPERGAN50TR application, or VIPERGAN50TR equivalent, key selection considerations include its integrated GaN switch, valley-lock function to suppress audible noise, adaptive blanking time for universal input efficiency, and auto-restart protections including iOVP, OVP, OCP_LEB, and thermal shutdown.
Technical Context
The VIPERGAN50TR implements a multi-mode QR control architecture: at heavy load it operates in true valley-synchronized ZVS mode; at medium load it engages valley-skipping with valley-lock to eliminate low-frequency current ripple; at light load it applies frequency foldback to maintain >20 kHz switching while minimizing losses; and under no-load it enters burst mode with 460–570 µA burst-current threshold and 60 mV hysteresis. All modes retain zero-voltage turn-on capability.
Its feedforward compensation uses auxiliary winding voltage sensed at the TB pin to modulate peak current limit proportionally to input line-reducing OPP variation across 85–265 VAC by >80%-while the ZCD block employs dual-threshold arming (110 mV) and triggering (60 mV) with 163–220 ns leading-edge blanking and 2–3.4 µs forced turn-on delay after blanking to ensure robust demagnetization detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Integrated Switch | 650 V E-mode GaN HEMT with 450–600 mΩ RDS(ON) @ 25°C; enables compact 50 W designs without external gate driver |
| Standby Power | <30 mW at 230 VAC no-load; achieved via adaptive burst mode with 0.7 V FB threshold and 60 mV hysteresis |
| Protection Set | Auto-restart OVP (2.5 V FB threshold), iOVP (5 V), brown-in/out (0.5 V / 0.4 V), OCP_LEB (1.9 A), OTP (140°C), and short-circuit protection |
| Control Frequency Range | Up to 240 kHz max (typ.), dynamically limited by blanking time and valley-lock; bottom-limited to >20 kHz to avoid audible noise |
| Startup Method | HV start-up via 8-pin (10–30 MΩ resistor); charges VDD from DRAIN; includes VDD foldback (1.4 V) and clamping (25 V) |
| Feedback Interface | Optocoupler-compatible FB pin with 0.7 V burst threshold, 1.15 V frequency reduction point, and 3 V saturation; supports primary-side regulation |
| Thermal Resistance | RTH-JEP = 1.5 °C/W (junction-to-exposed-pad); enables direct thermal coupling to PCB copper for 50 W operation without heatsink |
Pinout & Package
Package: PowerSSO-24 (exposed pad, thermally enhanced SO-24 variant), RoHS-compliant, rated for 150°C junction temperature. Exposed pad (EP) must be soldered to PCB ground plane for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, GND | Power and signal ground reference | Common return path for internal logic, driver, and sense circuits; connects directly to EP for low-inductance grounding |
| 5, BR | Brown-in/out detection input | Sets 0.5 V turn-on and 0.4 V turn-off thresholds; requires 10 nF capacitor to GND; disables if tied to BR |
| 6, iOVP | Input overvoltage protection input | Triggers shutdown at 5 V; ties to BR if unused; enables mains surge protection without external comparator |
| 7, N.A. | Internal die pad connection | Mechanically bonded to controller die; must be connected to GND for noise immunity; not user-accessible |
| 8, HV | HV start-up and feedforward bias node | Connects via 10–30 MΩ resistor to DRAIN; supplies startup current (3.55 mA typ.) and sets BR/iOVP thresholds |
| 9, TB | Dynamic blanking & valley sync adjustment | Configures input-line-dependent blanking time and turn-on delay; resistor divider from auxiliary winding enables precise valley alignment |
| 10, FB | Primary-side feedback input | Accepts optocoupler output; 0.7 V triggers burst mode; 1.15 V reduces switching frequency; 2.5 V initiates OVP shutdown |
| 11, ZCD | Zero-current detection input | Detects transformer demagnetization via negative-going edge at 60 mV; armed at 110 mV; includes 3 V / −60 mV clamps |
| 12, VDD | Controller supply rail | Internally regulated from HV start-up; 9–23 V operating range; requires 100 nF ceramic cap near pin for HF noise rejection |
| 13, DRV | GaN gate driver supply | Internally regulated to 6 V ±0.3 V; powers gate drive with 4 mA short-circuit capability; needs 1 µF low-ESR ceramic to GND |
| 15–16, DRAIN | Integrated GaN switch drain terminal | 650 V blocking rating; connects to primary winding; handles full 50 W power transfer; shares thermal path with EP |
| EP | Exposed thermal pad | Electrically tied to GND; mandatory solder connection to PCB ground plane for thermal dissipation and EMI suppression |
Key Features
| Feature | Design Value |
|---|---|
| Valley-lock function | Eliminates uneven valley-jump cycles during valley-skipping mode, suppressing audible mechanical vibration in transformers and inductors |
| Dynamic blanking time | Adjusts per-input-line via TB pin to reduce max switching frequency at high AC line, cutting frequency-related losses by up to 35% |
| Adaptive burst-mode control | Reduces standby consumption to <30 mW using FB voltage hysteresis and controlled peak-current on/off cycling |
| Integrated feedforward compensation | Modulates peak current limit in real time using auxiliary winding voltage, limiting output power variation to ±5% across 85–265 VAC |
| Auto-restart protection suite | Single-pin-configurable iOVP, OVP, brown-in/out, OCP_LEB, and OTP-all with latch-free recovery to maintain system uptime |
Applications
| USB PD Fast Chargers | Industrial Auxiliary Supplies |
|---|---|
|
Use Scenario: 20–45 W USB-C chargers for laptops and tablets operating from universal AC input (85–265 VAC). IC Role / Device Role / Timing Role: Primary-side QR flyback controller with integrated GaN switch; manages ZVS timing, valley synchronization, and burst-mode transitions. Use Value: Enables 50 W in 30 cm³ volume with >92% peak efficiency and <30 mW no-load consumption-meeting DOE VI and CoC Tier 2 requirements. |
Use Scenario: 12–24 V auxiliary power supply for PLC I/O modules, motor drives, and industrial HMIs requiring high reliability. IC Role / Device Role / Timing Role: Offline AC-DC controller with brown-in/out and iOVP; regulates isolated 15 V output with tight line/load regulation. Use Value: Delivers 50 W with built-in surge immunity (iOVP), wide input tolerance (±15%), and thermal shutdown-reducing need for external protection ICs. |
| Smart Home Lighting Drivers | White Goods Auxiliary PSUs |
|
Use Scenario: Dimmable LED driver for smart ceiling lights and downlights requiring flicker-free operation and low standby draw. IC Role / Device Role / Timing Role: Quasi-resonant controller with valley-lock and frequency foldback; ensures silent operation across dimming range. Use Value: Eliminates audible coil whine below 20 kHz while maintaining >89% efficiency at 10% load-critical for residential acoustic comfort. |
Use Scenario: 5–12 V standby and main PSU for refrigerators, washing machines, and dishwashers with long-life reliability demands. IC Role / Device Role / Timing Role: Main converter IC with embedded thermal shutdown, OCP_LEB, and OVP; powers MCU, display, and sensors. Use Value: Supports 15-year field life via 150°C-rated package, auto-restart fault handling, and <100 ppm/year parameter drift under thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quasi-resonant GaN-based flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE5QSBGx (Infineon) | 650 V CoolGaN + dedicated QR controller; no integrated sense FET; requires external current sense resistor | Lacks embedded OVP/iOVP and valley-lock; needs external protection circuitry for same safety level | Preferred when design requires independent gate drive tuning or higher than 50 W scaling with discrete GaN |
| UCC28780 (TI) | 650 V Si MOSFET controller only; no integrated switch; supports external GaN/SiC with programmable ZCD blanking | No integrated HV start-up or feedforward; requires external HV bias network and line-sensing resistors | Chosen for designs needing ultra-low BOM count with discrete GaN and advanced digital control via I²C interface |
Compared with ICE5QSBGx and UCC28780, VIPERGAN50TR offers the only single-package solution combining 650 V GaN, QR control, feedforward, valley-lock, and full protection set-reducing component count by ≥7 parts and eliminating layout-sensitive analog sensing networks.
Availability
VIPERGAN50TR is available at Aetrix Electronics and suitable for USB PD fast chargers, industrial auxiliary power supplies, smart lighting drivers, and white goods PSUs requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.
Supply support for VIPERGAN50TR 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 products for industrial, automotive, and consumer markets.
VIPERGAN50TR belongs to ST's VIPer™ GaN family-engineered specifically for high-density, high-efficiency offline AC-DC converters targeting USB-C PD, fast charging, and energy-efficient auxiliary power applications.
FAQ
What is the maximum continuous output power supported by VIPERGAN50TR?
The VIPERGAN50TR delivers up to 50 W continuous output power across 85–265 VAC input with adequate PCB copper area for thermal dissipation. At 185–265 VAC, typical capability increases to 75 W due to reduced conduction losses. Performance assumes proper layout, 1 µF DRV bypass, 100 nF VDD decoupling, and EP soldered to ≥4 cm² internal ground plane.
How does the valley-lock feature improve acoustic performance?
Valley-lock prevents irregular valley-jumping during valley-skipping mode by enforcing consistent off-time intervals-eliminating low-frequency (<20 kHz) current ripple that causes magnetostrictive vibration in transformers. This ensures silent operation across full load range, verified per IEC 60068-2-64 vibration testing at 10–2000 Hz.
Can VIPERGAN50TR operate without an optocoupler?
No-VIPERGAN50TR requires an optocoupler on the FB pin for closed-loop regulation, as it lacks primary-side sensing or auxiliary winding voltage regulation capability. The FB pin interprets optocoupler current as error signal; alternative topologies like TL431-based feedback or digital isolators are compatible if they replicate the 0.7–3.0 V FB voltage range.
What is the recommended minimum value for the HV start-up resistor?
The HV start-up resistor (RHV) must be ≥10 MΩ to ensure reliable startup at 85 VAC while limiting residual consumption. Values below 10 MΩ risk exceeding 100 µA HV off-current (IHV), causing excessive dissipation in the start-up generator. ST recommends 22 MΩ for optimal balance of startup margin and no-load loss.
VIPERGAN50TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 15-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 650V
- Topology:
- Flyback
- Voltage - Start Up:
- -
- Voltage - Supply (Vcc/Vdd):
- 9V ~ 23V
- Duty Cycle:
- 50%
- Frequency - Switching:
- 240kHz
- Power (Watts):
- 50 W
- Fault Protection:
- Current Limiting, Over Load, Over Temperature, Over Voltage
- Control Features:
- Soft Start
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 15-QFN (5x6)
- Mounting Type:
- Surface Mount
VIPERGAN50TR FAQ
1.How can I place an order for VIPERGAN50TR through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPERGAN50TR 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 VIPERGAN50TR reliable?
The price and inventory of VIPERGAN50TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPERGAN50TR is usually 5 days.
3.What payment methods are accepted for VIPERGAN50TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPERGAN50TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPERGAN50TR?
VIPERGAN50TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPERGAN50TR 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 VIPERGAN50TR?
For technical support, including VIPERGAN50TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPERGAN50TR requirements.
6.How does Aetrix verify that VIPERGAN50TR is sourced from the original manufacturer or authorized distributors?
All VIPERGAN50TR 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 VIPERGAN50TR meets industry standards.
7.What is the process for return or replacement of VIPERGAN50TR?
All VIPERGAN50TR units undergo pre-shipment inspection (PSI). If there is an issue with VIPERGAN50TR, 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 VIPERGAN50TR part is unused and in its original packaging.
Return procedure for VIPERGAN50TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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