Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
VIPER17LD
STMicroelectronics
IC OFFLINE SWITCH FLYBACK 16SO
1861 Pcs New Original In Stock
Converter Offline Flyback Topology 60kHz 16-SO
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (224 Ratings)
VIPER17LD
Product Overview
8155344
DiGi Electronics Part Number
VIPER17LD-DGManufacturer
STMicroelectronics
VIPER17LD
Description
IC OFFLINE SWITCH FLYBACK 16SOInventory
1861 Pcs New Original In Stock
Converter Offline Flyback Topology 60kHz 16-SO
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
Real-Time Tracking for Every Order
Secure & Flexible Payment
Credit Card, VISA, MasterCard, PayPal, Western Union, Telegraphic Transfer(T/T) and more
All payments encrypted for security
VIPER17LD Technical Specifications
Category
Power Management (PMIC), AC DC Converters, Offline Switches
Packaging
Tube
Series
VIPer™ plus
Product Status
Active
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
70%
Frequency - Switching
60kHz
Power (Watts)
10 W
Fault Protection
Current Limiting, Over Temperature, Over Voltage
Control Features
-
Operating Temperature
-40°C ~ 150°C (TJ)
Package / Case
16-SOIC (0.154", 3.90mm Width)
Supplier Device Package
16-SO
Mounting Type
Surface Mount
Base Product Number
VIPER17
Datasheet & Documents
HTML Datasheet
VIPER17LD-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
497-14811-5-DG
497-14811-5
497-VIPER17LD
VIPER17LD-DG
Standard Package
2,000
Alternative Parts
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Je recommande vivement DiGi Electronics pour la qualité et la fiabilité de ses produits et emballages.
December 02, 2025
Their after-sales service demonstrates their dedication to quality and customer care.
December 02, 2025
I trust their brand for reliable, high-quality electronics backed by excellent support.
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
What are the key design-in risks when using the VIPER17LD in a universal input flyback converter for industrial applications?
When designing with the VIPER17LD in industrial environments, key risks include thermal management under continuous load at high ambient temperatures (up to 150°C TJ) and ensuring sufficient creepage/clearance on the PCB due to its 800V breakdown rating. To mitigate these, use a thermally enhanced layout with generous copper pour for the exposed pad, and verify insulation distances per IEC 60950 for 800V devices. The internal current limiting and over-temperature protection help with fault resilience, but avoid operating near the 10W upper limit without derating. Also, confirm Vcc stays above 8.5V during brown-out conditions to prevent unexpected resets.
How does the VIPER17LD compare to the UC3844BD1 or TNY286 in terms of integration and BOM reduction for low-power isolated supplies?
The VIPER17LD offers significantly higher integration than the UC3844BD1, which requires external MOSFETs, biasing, and protection circuits—increasing BOM count and layout complexity. Compared to the TNY286, the VIPER17LD provides higher breakdown voltage (800V vs. 725V), better thermal performance, and supports up to 10W designs more reliably. The VIPER17LD integrates the 800V startup cell, PWM controller, and power switch in one 16-SO package, reducing component count by up to 30%. This simplifies compliance with safety standards and improves reliability, especially in space-constrained or harsh environments.
What are the critical layout considerations when replacing a discrete flyback controller with the VIPER17LD in an existing 5V/2A power supply?
When replacing a discrete solution with the VIPER17LD in a 5V/2A (10W) supply, focus on minimizing ground loop areas for the current-sense and gate drive paths to reduce EMI and ringing. Route the COMP pin feedback traces away from noisy switching nodes, and place the Vcc decoupling capacitor (10μF ceramic + 100nF) as close as possible to the VDD and GND pins. Use a Kelvin connection for the sense resistor if current limiting accuracy is critical. Also, ensure the transformer’s auxiliary winding provides clean, stable bias above 8.5V under all load conditions to keep the IC powered without external bias circuits.
Can the VIPER17LD reliably replace the VIPER26LN in a legacy 9W auxiliary power supply without redesigning the transformer?
Replacing the VIPER26LN with the VIPER17LD in a 9W auxiliary supply is feasible but requires validation of the existing transformer’s compatibility. While both are 800V flyback controllers, the VIPER17LD operates at a fixed 60kHz switching frequency and has tighter duty cycle control (up to 70%) compared to the VIPER26LN’s variable frequency design. This can affect core saturation and Vcc winding output. Simulate or test the startup behavior to ensure the bias supply reaches 8.5V quickly and remains stable under light loads. Adjust auxiliary winding turns if Vcc sags during startup or over-temperature conditions.
What are the long-term reliability concerns when using the VIPER17LD in high-humidity environments, and how can they be addressed during PCB assembly?
The VIPER17LD has an MSL 3 rating (168-hour floor life), making it susceptible to moisture absorption during storage or assembly in high-humidity environments. If not handled properly, this can lead to popcorning during reflow, causing internal cracks and early failure. Always store in dry packaging with desiccant and bake if exposed beyond 168 hours. Use a controlled reflow profile with prebake if necessary. For long-term reliability, conformal coating or potting is recommended in humid or condensing environments, especially on high-voltage nodes near the drain pin, to prevent leakage currents and corrosion.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
VIPER17LD CAD Models
STMicroelectronics VIPER17LD PCB symbols & footprints
productDetail
