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STMicroelectronics VIPER15HDTR
- Part No.:
- VIPER15HDTR
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
VIPER15HDTR.pdf
- Description:
- IC OFFLINE SWITCH FLYBACK 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,334
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Product details
Overview
VIPER15HDTR from STMicroelectronics is an off-line high-voltage quasi-resonant (QR) PWM controller IC with integrated 800 V avalanche-rugged N-channel power MOSFET, adjustable current limiting via ZCD pin, <50 mW standby power at 265 Vac, and hysteretic thermal shutdown. It targets auxiliary and adapter SMPS in consumer electronics and industrial systems.
For engineers reviewing the VIPER15HDTR datasheet, VIPER15HDTR pinout, VIPER15HDTR application, or VIPER15HDTR equivalent, this device supports QR flyback topologies with valley-switching operation, brown-in/brown-out protection, burst-mode light-load management, and dual-level overcurrent protection - critical for energy-efficient, compact AC/DC converters.
Technical Context
The VIPER15HDTR integrates a high-voltage startup generator sourcing current directly from the DRAIN pin, enabling self-biasing without external HV resistors. Its ZCD pin performs zero-current detection for QR timing, sets drain current limit via external resistor (IZCD), enables voltage feed-forward, and implements strobed digital overvoltage protection (VOVP = 4.2 V typ).
Control logic includes frequency foldback, valley-skipping mode, double blanking time (2.5–6.3 µs), and auto-restart with low repetition rate after fault clearance. Soft-start (tSS = 4.2 ms) ramps peak drain current from zero to IDlim = 0.4 A, while burst-mode activation occurs when FB voltage falls below VFBbm = 0.45 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Drain-source BVDSS | 800 V min - enables direct connection to universal AC input (85–265 Vac) without pre-regulator |
| RDS(on) | 20 Ω typ @ 25 °C - defines conduction loss and thermal design margin in primary-side switching |
| Standby power | <50 mW @ 265 Vac - meets EU CoC v5 Tier 2 and DOE Level VI no-load requirements |
| Quasi-resonant operation | Valley-switching enabled via ZCD pin - reduces EMI and improves efficiency vs hard-switched flyback |
| Thermal shutdown | 155 °C trip with 30 °C hysteresis - prevents latch-up and enables safe auto-restart after cooling |
| Burst-mode threshold | VFBbm = 0.45 V (falling) - triggers low-frequency switching to minimize light-load losses |
| Current limit adjust | Set by resistor from ZCD to GND - allows precise IDlim tuning (0.4 A typ) across line/load conditions |
Pinout & Package
Package: SO-16 narrow (SO16N), surface-mount, with DRAIN pins (7,8) connected to metal frame for enhanced thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (pins 1–2) | Device ground / Power section source | Reference node for control circuitry and return path for internal SenseFET current sensing |
| VDD (pin 5) | Control supply input | Charged by HV startup current; clamped at 23.5 V; UVLO thresholds at 14 V (on) and 8 V (off) |
| ZCD (pin 6) | Multi-function control pin | Enables QR demagnetization sensing, current limit setting, feed-forward, and OVP - all via single external resistor network |
| FB (pin 7) | Feedback input | Sourced current (−200 µA typ); regulates duty cycle; triggers burst mode below 0.45 V and OLP above 4.8 V |
| BR (pin 8) | Brown-out detection | Hysteretic comparator (VBRth = 0.45 V, VBRhyst = 50 mV) - disables switching during low-input events |
| DRAIN (pins 13–16) | High-voltage power switch terminal | Carries full primary current; draws HV startup current; requires copper pour under pins for thermal relief |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 800 V power MOSFET | Eliminates external HV switch and gate driver, reducing BOM count and PCB area in <10 W adapters |
| Adjustable current limit via ZCD | Allows precise IDlim tuning (0.38–0.42 A) using one resistor - simplifies overcurrent protection design |
| Quasi-resonant valley switching | Reduces switching losses and EMI, enabling smaller EMI filter components and lower system cost |
| Hysteretic thermal shutdown | 155 °C trip + 30 °C hysteresis ensures reliable recovery without manual reset or external circuitry |
| Brown-in/brown-out protection | Prevents erratic operation during AC line sags or surges - maintains stable output regulation across wide input range |
Applications
| USB-C Wall Adapter | Smart Home Hub Power Supply |
|---|---|
Use Scenario: Compact 5 V/3 A USB-C adapter for smartphones and wearables operating from 85–265 Vac. IC Role / Device Role / Timing Role: Primary-side QR flyback controller with integrated MOSFET - manages switching, current limiting, and burst-mode transitions. Use Value: Achieves <50 mW no-load consumption and meets IEC 62368-1 creepage requirements using SO16N package and 800 V breakdown. | Use Scenario: Auxiliary 12 V/0.5 A supply for Wi-Fi/Bluetooth modules and sensors in battery-backed smart home hubs. IC Role / Device Role / Timing Role: Standby-optimized off-line controller - delivers regulated output while maintaining ultra-low quiescent draw. Use Value: Burst-mode operation and 0.9 mA no-switching supply current enable >10-year battery backup life during mains outage. |
| LCD Monitor Auxiliary PSU | LED Driver for Commercial Lighting |
Use Scenario: 19 V/0.8 A auxiliary supply powering logic, backlight inverter, and USB ports in 24″ LCD monitors. IC Role / Device Role / Timing Role: High-reliability QR controller with dual OCP and OVP - protects against transformer saturation and output short circuits. Use Value: 2nd-level OCP (0.6 A) and strobed OVP (4.2 V) prevent catastrophic failure during sustained overload or feedback loop open. | Use Scenario: Constant-voltage 24 V/1 A driver for LED troffers in office retrofit applications, operating from 120/277 Vac. IC Role / Device Role / Timing Role: Isolated flyback controller with brown-out protection - sustains operation during utility voltage fluctuations. Use Value: Brown-in/brown-out hysteresis (50 mV) avoids flicker or dropout during 277 Vac line dips common in commercial buildings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar off-line QR flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE2QS03G | 700 V BVDSS, external MOSFET required, no integrated HV startup | Requires external HV resistor network and discrete FET - increases component count and layout complexity | Select when higher power (>12 W) or tighter RDS(on) tolerance is needed; not drop-in compatible |
| LNK306P | 700 V BVDSS, frequency-jitter EMI reduction, no ZCD-based QR control | Uses primary-sensing constant-on-time control instead of valley detection - less precise demagnetization timing | Choose for cost-sensitive designs where EMI filtering priority outweighs QR efficiency gains |
Compared with ICE2QS03G and LNK306P, VIPER15HDTR uniquely combines 800 V integration, ZCD-based QR timing, and single-pin current limit adjustment - delivering lowest component count and highest reliability in sub-10 W universal-input adapters.
Availability
VIPER15HDTR is available at Aetrix Electronics and suitable for USB-C adapters, smart home hub power supplies, and LCD monitor auxiliary PSUs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for VIPER15HDTR 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.
VIPER15HDTR belongs to the VIPer™ off-line high-voltage converter family, designed specifically for compact, low-cost, energy-efficient AC/DC power supplies in consumer and industrial applications up to 10 W.
FAQ
What is the maximum continuous output power achievable with VIPER15HDTR in an open-frame design?
VIPER15HDTR delivers up to 6 W continuous output power in an open-frame configuration at 50 °C ambient temperature with adequate heat sinking, as verified in ST's reference design AN3551. This rating assumes SO16N package mounted on a standard FR4 board with 100 mm² copper pour under DRAIN pins and proper transformer selection for QR operation.
How does the ZCD pin implement both zero-current detection and current limiting?
The ZCD pin uses a single external resistor to set static drain current limit (IDlim) while simultaneously monitoring transformer demagnetization voltage. When ZCD voltage drops below 0.6 V (negative edge), it triggers MOSFET turn-on at valley; when pulled down via RLIM resistor, it scales IZCD to define IDlim = 0.4 A typ. These functions share the same pin but operate on different voltage thresholds and timing windows.
Does VIPER15HDTR require an external startup resistor?
No. VIPER15HDTR embeds a high-voltage startup generator that draws charging current directly from the DRAIN pin once VDRAIN exceeds 80 V (typ). This eliminates the need for external HV resistors, reducing no-load losses and improving reliability compared to controllers requiring bias networks.
What protection features activate during a sustained output short-circuit condition?
During sustained short-circuit, VIPER15HDTR engages second-level overcurrent protection (IDMAX = 0.6 A), triggering hiccup-mode auto-restart with low repetition rate. Concurrently, thermal shutdown (155 °C) activates if junction temperature exceeds limit, and burst-mode operation suppresses switching until fault clears - preventing device overstress and ensuring safe recovery.
VIPER15HDTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- VIPer™ plus
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Isolation:
- Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 800V
- Topology:
- Flyback
- Voltage - Start Up:
- 14 V
- Voltage - Supply (Vcc/Vdd):
- 8.5V ~ 23.5V
- Duty Cycle:
- -
- Frequency - Switching:
- 225kHz
- Power (Watts):
- 10 W
- Fault Protection:
- Current Limiting, Over Temperature, Over Voltage
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SO
- Mounting Type:
- Surface Mount
VIPER15HDTR FAQ
1.How can I place an order for VIPER15HDTR through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPER15HDTR 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 VIPER15HDTR reliable?
The price and inventory of VIPER15HDTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER15HDTR is usually 5 days.
3.What payment methods are accepted for VIPER15HDTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER15HDTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPER15HDTR?
VIPER15HDTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPER15HDTR 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 VIPER15HDTR?
For technical support, including VIPER15HDTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER15HDTR requirements.
6.How does Aetrix verify that VIPER15HDTR is sourced from the original manufacturer or authorized distributors?
All VIPER15HDTR 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 VIPER15HDTR meets industry standards.
7.What is the process for return or replacement of VIPER15HDTR?
All VIPER15HDTR units undergo pre-shipment inspection (PSI). If there is an issue with VIPER15HDTR, 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 VIPER15HDTR part is unused and in its original packaging.
Return procedure for VIPER15HDTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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