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STMicroelectronics VIPER265KDTR
- Part No.:
- VIPER265KDTR
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
VIPER265KDTR.pdf
- Description:
- IC OFFLINE SWITCH MULT TOP 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:18,625
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Product details
Overview
VIPER265KDTR from STMicroelectronics is a 1050 V high-voltage offline PWM converter IC integrating avalanche-rugged power MOSFET, current-mode controller, embedded startup/sense FET, 500 mA drain current limit, and jittered 60 kHz switching for low EMI - used in non-isolated buck and flyback auxiliary supplies for industrial 3-phase metering systems.
For engineers reviewing the VIPER265KDTR datasheet, VIPER265KDTR pinout, VIPER265KDTR application, or VIPER265KDTR equivalent, key selection factors include its 1050 V breakdown rating, SO16N thermal pad package, 30 mW standby power at 230 VAC, integrated error amplifier for primary-side regulation, and safe auto-restart behavior after overcurrent or thermal fault.
Technical Context
The VIPER265KDTR implements a current-mode PWM control architecture with internal transconductance error amplifier referenced to 3.3 V at FB, COMP pin providing linear voltage range (VCOMPL to VCOMPH) for optocoupler feedback or direct loop compensation. Its embedded high-voltage startup circuit draws bias current directly from the DRAIN pin.
Thermal protection uses hysteretic shutdown at 160 °C, and fault recovery employs safe auto-restart with soft-start reinitialization. Frequency jittering (±4 kHz around 60 kHz) reduces conducted EMI peaks, enabling smaller EMI filter components in compact industrial auxiliary supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V(BR)DSS | 1050 V - enables direct connection to 3-phase rectified bus (up to ~800 VDC) without external HV pre-regulator |
| RDS(on) | 8.5 Ω max @ 25°C - defines conduction loss and thermal rise under full-load 500 mA drain current |
| IDLIM | 500 mA - sets peak switch current limit for overcurrent protection in flyback/buck topologies |
| FOSC | 60 kHz ± 4 kHz - jittered frequency reduces EMI filter size and cost in space-constrained industrial designs |
| Standby Power | < 30 mW at 230 VAC - meets stringent energy-saving requirements for always-on auxiliary rails |
| VREF_FB | 3.3 V typical - internal error amplifier reference enables precise output voltage setting via resistor divider |
| TSD | 160 °C typical - hysteretic thermal shutdown prevents latch-up and allows autonomous recovery after cooling |
Pinout & Package
Package: SO16N with exposed metal frame (pins 13–16 and pin 4 connected to die pad) for enhanced thermal dissipation; requires PCB copper area under DRAIN pins per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Controller ground reference & MOSFET source node | Common return for control logic, error amp, and power switch; must be low-impedance |
| 5 VCC | Control section supply input | Charges external capacitor; powers internal logic and gate driver during operation |
| 7 FB | Inverting input of transconductance error amplifier | Accepts feedback voltage; 3.3 V reference sets regulation point for primary- or secondary-side control |
| 8 COMP | Error amplifier output & PWM control interface | Drives compensation network to GND or connects to optocoupler cathode for isolated regulation |
| 13–16 DRAIN | High-voltage power switch drain terminals | Carry full switched current; connected to metal frame for heat transfer to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1050 V avalanche-rugged MOSFET | Eliminates need for external HV switch and startup resistor in 3-phase industrial auxiliary supplies |
| Jittered 60 kHz switching | Reduces EMI peak amplitude by spreading spectral energy, lowering filter component count and board area |
| Embedded soft-start | Prevents inrush current and output overshoot during power-up in buck/flyback converters |
| Safe auto-restart after fault | Resets OCP/thermal faults with controlled soft-start instead of latching off - improves system reliability |
| Standby power < 30 mW | Enables compliance with IEC 62301 Ed.2 Class 1 (≤ 0.5 W) and EU CoC Tier 2 standby limits |
Applications
| Energy Meter Auxiliary Supply | Industrial PLC I/O Module Power |
|---|---|
Use Scenario: Provides isolated 5 V/12 V auxiliary rail from 3-phase 400 VAC mains in smart electricity meters. IC Role / Device Role / Timing Role: Primary-side regulated flyback controller with integrated HV switch and jittered PWM timing. Use Value: Eliminates external HV startup circuit and reduces BOM count by 4–6 components versus discrete solutions. | Use Scenario: Powers digital I/O isolation, ADC bias, and microcontroller rails in modular PLC backplanes. IC Role / Device Role / Timing Role: Non-isolated buck converter delivering stable 3.3 V from rectified DC bus. Use Value: 1050 V rating withstands transient surges on industrial DC bus; <30 mW standby extends battery backup runtime. |
| LED Driver for Street Lighting | Smart Sensor Node Power |
Use Scenario: Drives constant-current LED strings in outdoor street lighting using buck-boost topology. IC Role / Device Role / Timing Role: Current-mode PWM controller with adjustable OCP and thermal foldback. Use Value: 500 mA drain limit and 160 °C thermal shutdown ensure robust operation in sealed, high-ambient enclosures. | Use Scenario: Supplies ultra-low-power MCU and wireless transceiver in battery-assisted industrial sensor nodes. IC Role / Device Role / Timing Role: Standby-optimized flyback controller with burst-mode operation below light load. Use Value: <30 mW no-load consumption extends 10-year battery life in maintenance-free deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage offline converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VIPER267KDTR | 700 mA drain current limit vs. 500 mA; otherwise identical pinout, package, and features | Supports higher output power in same footprint - suitable when >5 W required in flyback/buck | Select when peak load exceeds 5 W or transformer design demands higher current headroom |
| ICE3BRS01J | 700 V breakdown (vs. 1050 V); external HV startup; no integrated error amp; requires optocoupler for regulation | Requires additional HV components and feedback circuitry - increases BOM and layout complexity | Choose only if legacy design reuse or lower-cost sourcing outweighs integration and surge immunity benefits |
Compared with VIPER265KDTR, VIPER267KDTR offers higher current capability in identical form factor, while ICE3BRS01J trades integration and surge robustness for broader vendor availability - making VIPER265KDTR optimal for new industrial designs prioritizing compactness, reliability, and simplified certification.
Availability
VIPER265KDTR is available at Aetrix Electronics and suitable for energy metering auxiliary supplies, industrial PLC I/O module power, and smart street lighting LED drivers requiring stable component supply across multi-year production cycles.
Supply support for VIPER265KDTR 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.
The VIPer™ family targets highly integrated, high-voltage AC-DC conversion for space- and cost-constrained auxiliary power supplies in industrial and metering applications - emphasizing ruggedness, low standby power, and minimal external components.
FAQ
What is the maximum continuous output power achievable with VIPER265KDTR in a non-isolated buck configuration?
At 230 VAC input and 40°C ambient, VIPER265KDTR delivers up to 4.5 W continuously in a well-heatsinked SO16N buck design. This assumes 8.5 Ω RDS(on), 500 mA IDLIM, and proper PCB copper area under DRAIN pins. Output power drops above 60°C ambient due to thermal derating starting at 160 °C junction temperature.
Can VIPER265KDTR operate without an external optocoupler in isolated flyback designs?
Yes - it supports primary-side regulation using the FB pin and a Zener-based feedback network, eliminating the optocoupler. The internal 3.3 V reference and transconductance error amplifier enable ±3% output regulation accuracy without secondary-side sensing, reducing cost and improving reliability in metering applications.
How does the jittered switching frequency affect EMI compliance testing?
The ±4 kHz frequency spread around 60 kHz lowers peak radiated/conducted emissions by 5–8 dB compared to fixed-frequency operation. This allows simpler, lower-cost EMI filters - verified in ST's DB3809 reference design meeting EN 55022 Class B with minimal filtering components in 3-phase auxiliary supply layouts.
Is the SO16N package RoHS-compliant and lead-free?
Yes - VIPER265KDTR in SO16N packaging conforms to RoHS Directive 2011/65/EU and is lead-free, with matte tin terminal finish. ST's official device summary (Doc ID034026) confirms halogen-free status and JEDEC J-STD-020 moisture sensitivity level MSL3 for standard SMT assembly processes.
VIPER265KDTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- VIPER™
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Either
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 1050V
- Topology:
- Buck, Buck-Boost, Flyback
- Voltage - Start Up:
- 13 V
- Voltage - Supply (Vcc/Vdd):
- 11.5V ~ 23.5V
- Duty Cycle:
- 80%
- Frequency - Switching:
- 60kHz
- Power (Watts):
- 20 W
- Fault Protection:
- Current Limiting, Over Load, Short Circuit
- Control Features:
- EN, Soft Start
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SO
- Mounting Type:
- Surface Mount
VIPER265KDTR FAQ
1.How can I place an order for VIPER265KDTR through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPER265KDTR 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 VIPER265KDTR reliable?
The price and inventory of VIPER265KDTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER265KDTR is usually 5 days.
3.What payment methods are accepted for VIPER265KDTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER265KDTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPER265KDTR?
VIPER265KDTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPER265KDTR 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 VIPER265KDTR?
For technical support, including VIPER265KDTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER265KDTR requirements.
6.How does Aetrix verify that VIPER265KDTR is sourced from the original manufacturer or authorized distributors?
All VIPER265KDTR 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 VIPER265KDTR meets industry standards.
7.What is the process for return or replacement of VIPER265KDTR?
All VIPER265KDTR units undergo pre-shipment inspection (PSI). If there is an issue with VIPER265KDTR, 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 VIPER265KDTR part is unused and in its original packaging.
Return procedure for VIPER265KDTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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