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STMicroelectronics VIPER06XSTR
- Part No.:
- VIPER06XSTR
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
VIPER06XSTR.pdf
- Description:
- IC OFFLINE SWITCH MULT TOP 10SSO
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
VIPER06XSTR from STMicroelectronics is a high-voltage offline PWM controller with integrated 800 V avalanche-rugged power MOSFET, designed for flyback and buck converters in low-power AC/DC applications. It operates at 30 kHz, delivers up to 6 W in enclosed adapters and 8 W in open-frame designs, supports direct mains-derived self-biasing (no auxiliary winding), and achieves <30 mW standby power at 265 VAC.
For engineers reviewing the VIPER06XSTR datasheet, VIPER06XSTR pinout, VIPER06XSTR application, or VIPER06XSTR equivalent, key selection criteria include its 800 V drain-source breakdown, adjustable current limit via LIM pin, burst-mode operation for ultra-low no-load consumption, hysteretic thermal shutdown at 150–160 °C, and compatibility with both isolated and non-isolated feedback topologies.
Technical Context
The VIPER06XSTR integrates a SenseFET-based current-sensing power stage with cycle-by-cycle current limiting and soft-start, enabling robust overcurrent protection without external sensing resistors. Its internal oscillator employs frequency jittering (±2 kHz at 230 Hz) to reduce EMI peak amplitudes, and burst-mode operation dynamically lowers switching frequency under light load to minimize core and switching losses.
Feedback control uses an internal transconductance error amplifier (VREF_FB = 3.3 V typ.) with FB as inverting input and COMP as output node-supporting either direct resistor-based regulation (non-isolated) or optocoupler-coupled loop (isolated). The LIM pin allows precise reduction of the default 350 mA current limit using an external resistor, while the DRAIN pins serve dual roles: high-voltage switching node and thermal path to PCB copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Drain-source breakdown voltage | 800 V min.-enables direct rectified mains connection without external HV MOSFET or snubber |
| Switching frequency | 30 kHz ±2 kHz-fixed frequency with spread-spectrum modulation reduces EMI filter component count and cost |
| Standby power | <30 mW at 265 VAC-meets Energy Star and EU CoC Tier 2 requirements for no-load operation |
| Current limit (default) | 0.35 A typ.-cycle-by-cycle overcurrent protection prevents transformer saturation and secondary diode stress |
| Thermal shutdown | 150–160 °C with 30 °C hysteresis-prevents thermal runaway during sustained overload or poor heatsinking |
| FB reference voltage | 3.3 V ±0.1 V-defines regulated output voltage when single resistor connects output to FB pin |
| Burst mode threshold | VCOMP = 1.1 V ±0.1 V-triggers low-frequency ON/OFF cycling to cut dynamic losses below ~10% load |
Pinout & Package
The VIPER06XSTR is available in SSO10 (10-lead shrink small outline) package with exposed metal pad for thermal dissipation. DRAIN pins (6–10) are internally bonded to the MOSFET die and connected to the exposed frame for efficient heat transfer to PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Source reference & controller ground | Common return for internal MOSFET source, error amplifier, and logic-must be low-impedance connection to minimize noise coupling |
| VDD (Pin 2) | Control section supply | Charged by internal HV generator from DRAIN; powers all logic and gate driver-clamped at 23.5 V to protect internal circuitry |
| LIM (Pin 3) | Current limit set point | Sinks current to GND via external RLIM resistor; sets drain current limit down to 85 mA in burst mode |
| FB (Pin 4) | Inverting input of error amplifier | Accepts feedback voltage; regulates output by comparing to 3.3 V internal reference-internal pull-up prevents floating fault |
| COMP (Pin 5) | Error amplifier output & PWM control node | Drives external RC compensation network; also interfaces with optocoupler in isolated designs-voltage range 1.1–3.0 V defines operating modes |
| DRAIN (Pins 6–10) | High-voltage MOSFET drain | Carries full primary-side switching current; supplies startup bias current; thermally coupled to exposed package frame |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 800 V power MOSFET | Eliminates need for external HV switch and associated gate drive circuitry in sub-10 W AC/DC designs |
| Self-biasing startup | Draws initial current directly from rectified mains via DRAIN pins-removes requirement for auxiliary winding or bias transformer |
| Adjustable overcurrent protection | LIM pin enables precise setting of current limit from 0.35 A down to 85 mA (burst mode), supporting diverse transformer designs |
| Hysteretic thermal shutdown | Shuts down at 150–160 °C and restarts only after 30 °C cooldown-prevents repeated thermal cycling and ensures safe recovery |
| Safe auto-restart after fault | Implements 1 s fixed restart delay with soft-start reinitialization-limits average power during sustained short-circuit or overload |
Applications
| Smart Home Power Supplies | LED Lighting Drivers |
|---|---|
|
Use Scenario: Compact wall-plug adapters powering Wi-Fi routers, smart thermostats, and IoT sensors in residential environments. IC Role / Device Role / Timing Role: Primary-side PWM controller and power switch in non-isolated flyback topology, regulating 5 V/12 V outputs directly from 85–265 VAC. Use Value: Achieves <30 mW no-load consumption and meets IEC 62368-1 reinforced insulation requirements without auxiliary winding or optocoupler. |
Use Scenario: Constant-voltage LED drivers for GU10 and E27 retrofit lamps with dimmable input compatibility. IC Role / Device Role / Timing Role: Integrated HV controller/MOSFET delivering stable 12–24 V output in isolated flyback configuration with optocoupler feedback. Use Value: Burst-mode operation eliminates audible coil whine at low dimming levels while maintaining <0.5 W standby per lamp. |
| Energy Meter Auxiliary Supplies | White Goods Control Power |
|
Use Scenario: On-board 5 V/3.3 V supply for microcontrollers and RTCs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Primary-side controller in open-frame flyback design, operating continuously at 50 °C ambient with no forced airflow. Use Value: Delivers 4 W continuous output with 800 V breakdown margin against line surges per IEC 61000-4-5 Level 3 (2 kV). |
Use Scenario: Embedded 12 V supply for control boards in washing machines, dishwashers, and refrigerators. IC Role / Device Role / Timing Role: High-reliability offline converter powering MCU, display, and relay drivers in harsh industrial-grade environments. Use Value: Hysteretic thermal shutdown and safe auto-restart prevent latch-up during motor surge events or cabinet overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar offline PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE2QS03G | 650 V breakdown, 65 kHz fixed frequency, requires auxiliary winding for startup | Lacks direct mains self-biasing; needs higher BOM count for bias supply and lower HV margin | Preferred where higher switching frequency justifies added complexity and lower surge immunity is acceptable |
| LNK304P | 700 V breakdown, 66 kHz, integrated X-cap discharge, no LIM pin adjustment | Fixed current limit only; no user-adjustable OCP; lacks burst-mode VCOMP threshold control | Selected when simplified design and integrated safety features outweigh need for fine-tuned current limiting |
Compared with ICE2QS03G and LNK304P, the VIPER06XSTR offers superior surge resilience (800 V), true no-winding startup, and granular current limit tuning-making it optimal for cost-sensitive, space-constrained, and high-reliability low-power AC/DC systems.
Availability
VIPER06XSTR is available at Aetrix Electronics and suitable for smart home power supplies, LED lighting drivers, energy meter auxiliary supplies, and white goods control power requiring stable component supply across long-lifecycle industrial programs.
Supply support for VIPER06XSTR 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, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.
The VIPER series targets cost-optimized, high-efficiency offline SMPS designs-specifically engineered to replace capacitive dropper supplies and simplify AC/DC conversion in sub-10 W applications.
FAQ
What is the maximum continuous output power achievable with VIPER06XSTR in an open-frame design?
The VIPER06XSTR delivers up to 8 W continuous output power in open-frame configurations at 50 °C ambient temperature with adequate PCB copper heatsinking. This rating assumes proper layout per ST's AN4171 guidelines, including ≥100 mm² of 35 µm copper under DRAIN pins and optimized transformer selection to maintain junction temperature below 150 °C.
Can VIPER06XSTR operate without an optocoupler in isolated flyback topologies?
Yes-VIPER06XSTR supports optocoupler-less isolated flyback using primary-side regulation (PSR) techniques. By connecting the FB pin to GND and configuring the COMP pin with a Zener-based feedback network tied to the auxiliary winding, the device regulates output voltage based on reflected auxiliary voltage, eliminating optocoupler and TL431 components.
How does the LIM pin adjust the current limit, and what is the minimum achievable value?
The LIM pin sinks current proportional to the external resistor RLIM connected to GND. As RLIM decreases from open-circuit, the default 0.35 A current limit scales linearly down to 85 mA-the burst-mode current limit-per Figure 14 in the datasheet. For example, RLIM = 47 kΩ yields ~0.25 A, verified across temperature and line conditions.
Is VIPER06XSTR compliant with modern energy efficiency standards like EU CoC Tier 2?
Yes-VIPER06XSTR achieves <30 mW standby power at 265 VAC and maintains high light-load efficiency via burst-mode operation, fully satisfying EU Commission Regulation (EU) No 801/2013 (CoC Tier 2) and ENERGY STAR® Version 3.0 requirements for external power supplies.
VIPER06XSTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- VIPer™ plus
- Package/Case:
- 10-SOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Either
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 800V
- Topology:
- Buck, Flyback
- Voltage - Start Up:
- 13 V
- Voltage - Supply (Vcc/Vdd):
- 11.5V ~ 23.5V
- Duty Cycle:
- 70%
- Frequency - Switching:
- 30kHz
- Power (Watts):
- 8 W
- Fault Protection:
- Current Limiting, Open Loop, Over Temperature
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-SSOP
- Mounting Type:
- Surface Mount
VIPER06XSTR FAQ
1.How can I place an order for VIPER06XSTR through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPER06XSTR 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 VIPER06XSTR reliable?
The price and inventory of VIPER06XSTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER06XSTR is usually 5 days.
3.What payment methods are accepted for VIPER06XSTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER06XSTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPER06XSTR?
VIPER06XSTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPER06XSTR 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 VIPER06XSTR?
For technical support, including VIPER06XSTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER06XSTR requirements.
6.How does Aetrix verify that VIPER06XSTR is sourced from the original manufacturer or authorized distributors?
All VIPER06XSTR 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 VIPER06XSTR meets industry standards.
7.What is the process for return or replacement of VIPER06XSTR?
All VIPER06XSTR units undergo pre-shipment inspection (PSI). If there is an issue with VIPER06XSTR, 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 VIPER06XSTR part is unused and in its original packaging.
Return procedure for VIPER06XSTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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