My Inquiry
My Account
STMicroelectronics VIPER115HSTR
- Part No.:
- VIPER115HSTR
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
VIPER115HSTR.pdf
- Description:
- IC OFFLINE SW MULT TOP 10SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,385
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
VIPER115HSTR from STMicroelectronics is a high-voltage offline PWM converter IC integrating an 800 V avalanche-rugged N-channel MOSFET, current-mode controller, HV startup circuit, and sense-FET in SSOP10 package. It delivers up to 12 W in open-frame designs at 50 °C ambient, supports flyback/buck/buck-boost topologies, and achieves <10 mW no-load input power at 230 VAC - meeting stringent energy-saving standards for low-power SMPS.
For engineers reviewing the VIPER115HSTR datasheet, VIPER115HSTR pinout, VIPER115HSTR application, or VIPER115HSTR equivalent, this page provides verified technical context on its jittered 120 kHz ±7% switching frequency, 590 mA drain current limit, embedded thermal shutdown, pulse-skip protection against flux-runaway, and direct/secondary feedback support - all critical for reliable adapter and home appliance power supply design.
Technical Context
The VIPER115HSTR implements a current-mode PWM architecture with integrated 800 V primary MOSFET (RDS(on) = 17 Ω typ. @ 25 °C), enabling ultra-wide AC input range (85–265 VAC) without external snubber scaling. Its HV startup circuit delivers 7.5 mA max VCC charging current at 100 V DRAIN, transitioning from ICH1 to ICH3 as VCC rises past 1 V and VCCon (16 V typ.).
It features a jittered oscillator (120 kHz ±7% at 260 Hz modulation rate) to reduce EMI filter cost, pulse-skipping logic that enforces minimum off-time to prevent flux-runaway during startup, and an internal transconductance error amplifier (Gm = 500 μA/V typ.) with 1.2 V reference referenced to GND - supporting both direct (non-isolated) and optocoupler-based secondary feedback configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Drain Voltage Rating | 800 V - enables direct connection to rectified mains up to 265 VAC with margin, reducing snubber component count and size. |
| Drain Current Limit | 590 mA typ. - sets peak primary current threshold for overload protection and power capability calibration in flyback designs. |
| Switching Frequency | 120 kHz ±7% - higher frequency allows smaller magnetics; jitter spreads spectral energy to ease average-mode EMI compliance. |
| No-Load Input Power | <10 mW at 230 VAC - meets EU CoC Tier 2 and DOE Level VI standby efficiency requirements without auxiliary winding. |
| VCC Operating Range | 4.5 V to 30 V - supports wide-range auxiliary supply design and accommodates voltage ripple during transient load steps. |
| Thermal Shutdown | 150 °C junction temperature - protects MOSFET and controller under sustained overload or poor heatsinking conditions. |
| Soft-Start Time | 8 ms typ. - ramps current limit in 8 steps to limit inrush into discharged output capacitors, preventing transformer saturation. |
Pinout & Package
Package: SSOP10 (3.9 mm × 4.9 mm, 0.65 mm pitch), thermally enhanced with DRAIN pins (6–10) connected to internal MOSFET metal pad for PCB copper area heat sinking (RTH-JA = 95 °C/W with 100 mm² Cu).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | MOSFET source & bias return | Common reference for internal circuits; must be isolated from pulsed current return paths to avoid noise coupling into control loop. |
| 2 VCC | Controller supply rail | Charged by internal HV current source at startup; requires ≥10 μF storage capacitor + 0.1 μF ceramic bypass for stable operation. |
| 3 DIS | Disable input | Triggers auto-restart shutdown if held >1.2 V for >1 ms; used for line/output overvoltage protection via external divider. |
| 4 FB | Inverting input of error amplifier | Accepts 1.2 V reference-based feedback; tied to GND to disable E/A in optocoupler-driven secondary regulation. |
| 5 COMP | Error amplifier output | Drives current-limit setpoint; in secondary feedback, directly driven by optocoupler LED to modulate DRAIN peak current. |
| 6–10 DRAIN | MOSFET drain terminals | High-voltage switching node; all five pins are internally bonded to MOSFET die pad - must connect to large PCB copper pour for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 800 V avalanche-rugged MOSFET | Eliminates need for external HV switch and gate driver; reduces BOM count and layout complexity in universal-input SMPS. |
| Jittered 120 kHz oscillator | Spreads EMI spectrum across ±7% bandwidth at 260 Hz, lowering peak conducted emissions and enabling smaller EMI filter components. |
| Pulse-skip protection | Prevents flux-runaway during startup by skipping cycles when DRAIN current exceeds 590 mA within 300 ns min. on-time. |
| Embedded soft-start (8 ms) | Gradually increases current limit in 8 discrete steps, avoiding transformer core saturation and output overshoot at power-on. |
| Direct & secondary feedback support | FB/COMP pins configurable for non-isolated (direct divider) or isolated (optocoupler) regulation - simplifies topology selection. |
Applications
| Smart Home Power Adapters | Industrial Sensor Power Supplies |
|---|---|
|
Use Scenario: Compact 5 V/1 A wall adapter powering Zigbee/Z-Wave hubs and smart plugs operating across global AC mains (85–265 VAC). IC Role / Device Role / Timing Role: Primary-side PWM controller and HV switch; regulates output via direct feedback while maintaining <10 mW no-load consumption. Use Value: Eliminates auxiliary winding and external HV MOSFET, reducing bill-of-materials by 4–6 components and PCB area by ≥25% versus discrete solutions. |
Use Scenario: DIN-rail mounted 12 V/0.5 A power module supplying field sensors in factory automation systems with wide ambient temperature range (−40 to +85 °C). IC Role / Device Role / Timing Role: Integrated offline converter with thermal shutdown and OVP; operates reliably under brownout and surge conditions per IEC 61000-4-5. Use Value: 800 V MOSFET withstands 4 kV line surges without clamping, and embedded protections reduce need for external TVS and reset circuitry. |
| LED Driver for Smart Lighting | White Goods Auxiliary Supply |
|
Use Scenario: Constant-voltage 24 V/0.3 A supply for tunable-white LED modules in residential lighting fixtures requiring flicker-free dimming and Class B EMI compliance. IC Role / Device Role / Timing Role: Flyback controller with jittered 120 kHz switching; uses secondary feedback via optocoupler for tight output regulation and EMI control. Use Value: Jittered frequency avoids audible noise in magnetics and eases EN55022 Class B conducted emission limits without oversized Y-capacitors. |
Use Scenario: 3.3 V/0.2 A auxiliary supply for microcontroller and display subsystems in washing machines and dishwashers exposed to high humidity and vibration. IC Role / Device Role / Timing Role: Buck-derived offline converter with embedded soft-start and pulse-skip; ensures clean power-up sequence during motor startup transients. Use Value: Soft-start prevents inrush-induced voltage sag on shared 3.3 V rail, and thermal shutdown guards against enclosure overheating during extended cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage offline PWM converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE2QS03G | 700 V MOSFET, fixed 65 kHz frequency, no jitter, requires external startup resistor and sense resistor. | Limited to ≤230 VAC input; higher no-load power (>30 mW); lacks integrated sense-FET and soft-start. | Choose only if legacy design reuse or lower-cost BOM outweighs efficiency and EMI advantages of VIPER115HSTR. |
| LNK364PG | 725 V MOSFET, 66 kHz, integrated X-cap discharge, but no direct feedback mode or programmable OLP. | Designed for constant-current LED drivers; lacks COMP pin flexibility for buck/flyback reconfiguration. | Select when X-cap safety discharge is mandatory and secondary-side regulation is acceptable; not suitable for direct-feedback adapters. |
Compared with ICE2QS03G and LNK364PG, VIPER115HSTR offers superior input voltage range (800 V vs. ≤725 V), lower no-load consumption (<10 mW vs. >30 mW), and greater topology flexibility via dual feedback modes - making it optimal for next-generation energy-compliant adapters and industrial auxiliary supplies.
Availability
VIPER115HSTR is available at Aetrix Electronics and suitable for smart home adapters, industrial sensor power modules, LED lighting drivers, and white goods auxiliary supplies requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for VIPER115HSTR 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, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.
VIPER11 is ST's dedicated energy-efficient offline converter product line, engineered to replace discrete HV MOSFET + controller combinations in sub-15 W AC-DC power supplies - prioritizing integration, low standby power, and robust protection.
FAQ
What is the maximum continuous output power achievable with VIPER115HSTR in a non-ventilated adapter?
The VIPER115HSTR delivers up to 10 W continuous output power in a non-ventilated enclosed adapter at 50 °C ambient temperature, as validated in ST's DS11873 Rev 5 datasheet Table 8. This rating assumes proper PCB copper area (100 mm²) under DRAIN pins and standard FR4 board construction. Exceeding this requires forced air or open-frame layout with enhanced heatsinking.
Can VIPER115HSTR operate with secondary-side optocoupler feedback?
Yes - the COMP pin is designed to accept current injection from an optocoupler LED in secondary feedback configurations. In this mode, the internal error amplifier is disabled by grounding the FB pin, and COMP directly controls the DRAIN peak current setpoint. This enables precise output regulation in isolated flyback designs without compromising transient response.
How does the pulse-skip function prevent flux-runaway during startup?
Pulse-skip monitors DRAIN current during each switching cycle's minimum on-time (300 ns). If current exceeds 590 mA before turn-off, the next cycle is skipped - extending off-time to allow full inductor discharge. This prevents net volt-second imbalance and core saturation, especially critical when output capacitors are uncharged and feedback loop is inactive.
Is an external startup resistor required for VIPER115HSTR?
No - VIPER115HSTR integrates a high-voltage current source that charges the VCC capacitor directly from the DRAIN pin, eliminating the need for an external high-voltage startup resistor. The internal HV MOSFET (800 V rated) and current source (7.5 mA max) enable reliable startup across full AC input range without power loss or thermal derating concerns.
VIPER115HSTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- VIPER™
- Package/Case:
- 10-SOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Non-Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 800V
- Topology:
- Buck, Buck-Boost, Flyback
- Voltage - Start Up:
- 16 V
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 30V
- Duty Cycle:
- 80%
- Frequency - Switching:
- 120kHz
- Power (Watts):
- 12 W
- Fault Protection:
- Current Limiting, Over Load, Over Voltage, Short Circuit
- Control Features:
- Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-SSOP
- Mounting Type:
- Surface Mount
VIPER115HSTR FAQ
1.How can I place an order for VIPER115HSTR through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPER115HSTR 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 VIPER115HSTR reliable?
The price and inventory of VIPER115HSTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER115HSTR is usually 5 days.
3.What payment methods are accepted for VIPER115HSTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER115HSTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPER115HSTR?
VIPER115HSTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPER115HSTR 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 VIPER115HSTR?
For technical support, including VIPER115HSTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER115HSTR requirements.
6.How does Aetrix verify that VIPER115HSTR is sourced from the original manufacturer or authorized distributors?
All VIPER115HSTR 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 VIPER115HSTR meets industry standards.
7.What is the process for return or replacement of VIPER115HSTR?
All VIPER115HSTR units undergo pre-shipment inspection (PSI). If there is an issue with VIPER115HSTR, 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 VIPER115HSTR part is unused and in its original packaging.
Return procedure for VIPER115HSTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VIPER115HSTR Tags
-
LNK6407D-TL
Power Integrations
-
LNK3204D-TL
Power Integrations
-
SR10LG-G
Microchip Technology
-
TNY285DG-TL
Power Integrations
-
LNK304DN-TL
Power Integrations
-
TNY285KG-TL
Power Integrations
-
LNK3206D-TL
Power Integrations
-
LNK623DG-TL
Power Integrations
-
TNY286PG
Power Integrations
-
LNK624DG-TL
Power Integrations
-
LNK604DG-TL
Power Integrations
-
UCC28704DBVR-1
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
