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STMicroelectronics VIPER011XSTR
- Part No.:
- VIPER011XSTR
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
VIPER011XSTR.pdf
- Description:
- IC OFFLINE SW MULT TOP 10SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,569
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Product details
Overview
VIPER011XSTR from STMicroelectronics is a high-voltage off-line SMPS controller integrating an 800 V avalanche-rugged N-channel power MOSFET, current-mode PWM control, and embedded HV startup circuitry. It delivers up to 7 W in enclosed adapters (230 VAC) and supports flyback, buck, and buck-boost topologies. Key confirmed parameters: 30 kHz ±7% jittered switching frequency, 30 Ω typical RDS(on) at 25 °C, 120 mA typical drain current limit (IDLIM), and <10 mW no-load input power at 230 VAC.
For engineers reviewing the VIPER011XSTR datasheet, VIPER011XSTR pinout, VIPER011XSTR application, or VIPER011XSTR equivalent, this device is selected for ultra-low standby power, wide universal AC input (85–265 VAC), and minimal external component count in cost-sensitive low-power converters for home appliances and lighting.
Technical Context
The VIPER011XSTR implements a fixed-frequency current-mode PWM controller with integrated 800 V start-up FET and sense-FET, enabling direct DRAIN-connected HV startup without auxiliary winding. Its transconductance error amplifier (500 µA/V typ.) references a 1.2 V internal bandgap and drives COMP to modulate peak drain current via HCOMP = 23 V/A (VIPER011*).
Protection architecture includes automatic-restart OCP (120 mA typ.), OLP (50 ms delay), line/output OVP, thermal shutdown (155 °C), and pulse-skip mode to prevent flux runaway below 15 kHz minimum frequency. Jittered oscillator (±7% at 260 Hz) reduces EMI filter size by spreading spectral energy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching frequency | 30 kHz ±7% - Jittered spread-spectrum operation lowers conducted EMI peak amplitude and eases compliance with EN55022 Class B. |
| Drain current limit (IDLIM) | 120 mA typ. - Sets maximum peak primary current for overcurrent protection and power scaling in flyback designs. |
| RDS(on) | 30 Ω typ. at 25 °C - Defines conduction loss in primary switch; increases to 60 Ω at 125 °C, requiring thermal derating. |
| No-load input power | <10 mW @ 230 VAC - Meets EU CoC Tier 2 and DOE Level VI standby efficiency requirements without auxiliary bias. |
| VCC operating range | 4.5 V to 30 V - Supports self-supply (capacitor only) or external supply (auxiliary winding), eliminating dedicated bias circuitry. |
| Thermal shutdown threshold | 155 °C - Protects against sustained overload or poor PCB heatsinking; restarts automatically after cooldown. |
| Start-up voltage (VHV_START) | 22 V typ. - Enables direct connection to rectified mains; eliminates external start-up resistor in some configurations. |
Pinout & Package
Package: SSOP10 (3.9 mm × 4.9 mm, 0.65 mm pitch), thermally enhanced with five DRAIN pins connected to internal MOSFET metal pad for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground and MOSFET source | Return path for bias currents and internal MOSFET source; must be isolated from pulsed return paths to avoid noise coupling. |
| 2 VCC | Controller supply | Charged by internal HV current source at startup; powers internal logic and gate driver; requires 10–100 µF storage capacitor. |
| 3 DIS | Disable input | Triggers auto-restart shutdown if voltage exceeds 1.2 V for >1 ms; used for line or output overvoltage protection. |
| 4 FB | Direct feedback input | Inverting input of transconductance error amplifier (1.2 V reference); accepts voltage divider from output or VCC in primary-sensing configurations. |
| 5 COMP | Compensation node | Output of internal error amplifier; connects to RC network for loop stability; driven directly by optocoupler in secondary-sensing designs. |
| 6–10 DRAIN | MOSFET drain terminals | High-voltage switching node (800 V rating); five pins share current and conduct heat to PCB copper area beneath package. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 800 V avalanche-rugged MOSFET | Enables direct universal AC input (85–265 VAC) without external snubber, reducing BOM count and board space. |
| Self-supply capability | Eliminates auxiliary winding and bias components-only one VCC capacitor required for full operation. |
| Jittered oscillator (±7% at 260 Hz) | Reduces EMI filter cost by spreading harmonic energy; passes average-detected EMI tests with smaller input LC filters. |
| Pulse-skip protection | Prevents transformer saturation during light-load or startup by skipping cycles when peak current falls below IDLIM threshold. |
| Embedded thermal shutdown with auto-restart | Halts switching at 155 °C junction temperature and resumes operation after cooldown-no external thermal sensor needed. |
Applications
| Home Appliance Power Supply | LED Lighting Driver |
|---|---|
|
Use Scenario: Standby and main power supply for washing machines, microwaves, and smart thermostats operating across global AC grids. IC Role / Device Role / Timing Role: Primary-side controller in flyback topology regulating 5 V/12 V rails; handles 85–265 VAC input with <10 mW no-load consumption. Use Value: Eliminates auxiliary winding and reduces component count by 30%, lowering bill-of-materials cost while meeting IEC 62301 Ed.2 standby power limits. |
Use Scenario: Constant-voltage LED driver for downlights and panel lights in residential/commercial settings. IC Role / Device Role / Timing Role: Integrated HV controller driving primary-side MOSFET in quasi-resonant flyback; regulates output via primary sensing or optocoupler feedback. Use Value: Achieves >75% efficiency at 250 mW load and <10 mW no-load, enabling compliance with Energy Star SSL V2.0 and Zhaga specifications. |
| Industrial Sensor Node PSU | Smart Plug AC-DC Converter |
|
Use Scenario: Isolated 3.3 V/5 V supply for battery-free wireless sensors in building automation systems. IC Role / Device Role / Timing Role: Buck-boost converter controller powering microcontroller and RF transceiver from rectified AC line; operates in pulse-frequency modulation under light load. Use Value: Delivers stable output across 100–240 VAC input with <400 mW total input power at 250 mW load, enabling maintenance-free deployment. |
Use Scenario: Embedded AC-DC power stage in Wi-Fi/Zigbee smart plugs with energy monitoring and relay control. IC Role / Device Role / Timing Role: Off-line flyback controller managing dual outputs (5 V for MCU, 3.3 V for radio) with OVP/OCP/OTP protections active during surge events. Use Value: Integrates HV startup, current sensing, and protection logic into single SSOP10 package-reducing footprint by 45% vs discrete controller + MOSFET solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage offline SMPS controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE2QS03G | Fixed 65 kHz frequency, no jitter; requires external HV start-up resistor; 650 V MOSFET rating. | Limited to ≤230 VAC input; higher EMI filter cost due to non-jittered switching; needs additional bias components. | Select when lower system cost outweighs EMI filter size and universal input range is not required. |
| LNK304P | 725 V MOSFET; 66 kHz frequency; no integrated sense-FET; uses external current-sense resistor. | Higher conduction loss due to external sense resistor; no self-supply option; larger solution size. | Choose for legacy designs already using LinkSwitch-3 platform or where tighter output regulation tolerance is prioritized over standby power. |
Compared with ICE2QS03G and LNK304P, VIPER011XSTR offers superior universal input support (800 V), lowest no-load power (<10 mW), and smallest BOM count due to integrated HV startup and sense-FET-making it optimal for next-generation energy-efficient consumer and industrial SMPS.
Availability
VIPER011XSTR is available at Aetrix Electronics and suitable for home appliance power supplies, LED lighting drivers, industrial sensor node PSUs, and smart plug AC-DC converters requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for VIPER011XSTR 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
VIPER01 is ST's energy-saving off-line high-voltage converter product line, engineered specifically for ultra-low standby power, minimal external component count, and robust protection in sub-10 W AC-DC applications.
FAQ
What is the maximum continuous output power achievable with VIPER011XSTR in an open-frame design?
VIPER011XSTR delivers up to 4.5 W continuous output power in open-frame configurations at 50 °C ambient temperature with adequate PCB copper heatsinking (100 mm²). This rating assumes proper thermal layout-five DRAIN pins soldered to ≥100 mm² of 35 µm Cu-and operation within absolute maximum ratings, including 1 W total power dissipation on a standard FR4 board.
Can VIPER011XSTR operate without an auxiliary winding or external bias supply?
Yes. VIPER011XSTR supports self-supply mode using only a single VCC capacitor charged by its internal HV current source. During steady-state operation, the IC reactivates the HV source when VCC drops to 4.25 V (typ.), delivering up to 8.8 mA to recharge the capacitor-eliminating need for auxiliary windings or bias resistors in most designs.
How does the jittered oscillator reduce EMI in VIPER011XSTR designs?
The 30 kHz switching frequency is modulated ±7% at 260 Hz, spreading harmonic energy across a ~4.2 kHz bandwidth. This lowers peak amplitudes in conducted EMI measurements-especially under average detection-allowing use of smaller, lower-cost input LC filters while maintaining compliance with CISPR 22/EN55022 Class B limits.
What protection features are implemented with automatic restart behavior?
VIPER011XSTR implements automatic-restart protection for overload/short-circuit (50 ms delay), line or output overvoltage (via DIS pin), max duty-cycle violation, and thermal shutdown (155 °C). After fault detection, it halts switching, discharges internal nodes, and initiates soft-start after 1 s (typ.)-ensuring safe recovery without manual reset or external circuitry.
VIPER011XSTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- 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, Buck-Boost, Flyback
- Voltage - Start Up:
- 8 V
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 30V
- Duty Cycle:
- 80%
- Frequency - Switching:
- 30kHz
- Power (Watts):
- 7 W
- Fault Protection:
- Current Limiting, Over Temperature, Over Voltage, Short Circuit
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-SSOP
- Mounting Type:
- Surface Mount
VIPER011XSTR FAQ
1.How can I place an order for VIPER011XSTR through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPER011XSTR 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 VIPER011XSTR reliable?
The price and inventory of VIPER011XSTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER011XSTR is usually 5 days.
3.What payment methods are accepted for VIPER011XSTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER011XSTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPER011XSTR?
VIPER011XSTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPER011XSTR 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 VIPER011XSTR?
For technical support, including VIPER011XSTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER011XSTR requirements.
6.How does Aetrix verify that VIPER011XSTR is sourced from the original manufacturer or authorized distributors?
All VIPER011XSTR 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 VIPER011XSTR meets industry standards.
7.What is the process for return or replacement of VIPER011XSTR?
All VIPER011XSTR units undergo pre-shipment inspection (PSI). If there is an issue with VIPER011XSTR, 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 VIPER011XSTR part is unused and in its original packaging.
Return procedure for VIPER011XSTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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