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VIPER15LD
STMicroelectronics
IC OFFLINE SWITCH FLYBACK 16SO
2126 Pcs New Original In Stock
Converter Offline Flyback Topology 136kHz 16-SO
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Minimum 1
5.0 / 5.0
- (34 Ratings)
VIPER15LD
Product Overview
8180604
DiGi Electronics Part Number
VIPER15LD-DGManufacturer
STMicroelectronics
VIPER15LD
Description
IC OFFLINE SWITCH FLYBACK 16SOInventory
2126 Pcs New Original In Stock
Converter Offline Flyback Topology 136kHz 16-SO
Quantity
Minimum 1
Minimum 1
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VIPER15LD Technical Specifications
Category
Power Management (PMIC), AC DC Converters, Offline Switches
Packaging
-
Series
VIPer™ plus
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
136kHz
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
VIPER15
Datasheet & Documents
HTML Datasheet
VIPER15LD-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Standard Package
50
Alternative Parts
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
DiGi Electronics에서 주문한 부품이 예상보다 빠르게 도착해서 매우 놀랐습니다. 포장도 튼튼하게 되어 있어 제품이 아무 문제없이 도착했어요.
December 02, 2025
DiGi Electronics bietet hochwertige Produkte, die mein Budget schonen und zuverlässig sind.
December 02, 2025
Die günstigen Preise bei DiGi Electronics haben meine Budgetplanung deutlich erleichtert und mir viel Geld gespart.
December 02, 2025
Received my order quickly, and the products are of excellent quality.
December 02, 2025
Mobile site usability is excellent, allowing smooth shopping on my phone.
December 02, 2025
They continuously improve their support based on customer feedback.
December 02, 2025
I love how quickly my orders arrive; their shipping speed is remarkable.
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Frequently Asked Questions (FAQ)
What are the primary risks and mitigation strategies when designing a new product using the obsolete VIPER15LD flyback converter, considering its product status?
Designing with an obsolete part like the VIPER15LD presents a significant risk of long-term supply chain disruption. While it's currently in stock, you should anticipate potential End-of-Life (EOL) notices. For new designs, it's strongly recommended to select a currently active and supported part. If you must use the VIPER15LD, consider a robust component obsolescence management plan. This includes identifying and qualifying suitable, readily available substitutes like the VIPER17LD, VIPER16LD, or VIPER25LD early in the design process. Develop a strategy for second-sourcing and contingency inventory to buffer against potential shortages or immediate EOL.
For applications requiring a reliable offline flyback converter with high voltage breakdown, what are the key trade-offs when comparing the VIPER15LD to its potential successor, the VIPER17LD, to ensure stable operation under worst-case conditions?
The VIPER15LD and VIPER17LD both offer 800V breakdown voltage, which is excellent for offline flyback designs. However, the VIPER17LD series generally offers improved efficiency and potentially better thermal performance due to more advanced process technology. The primary trade-off is often cost and availability; while the VIPER17LD might be more expensive, it secures a future-proof design. When comparing, scrutinize the switching frequency capability and integrated protection features of the VIPER17LD against your specific application's needs. Ensure the VIPER17LD can meet your power output requirements and transient response without compromising stability, especially at elevated operating temperatures or during voltage sags.
When integrating the VIPER15LD into a compact 10W power supply, what are the critical thermal management considerations to prevent over-temperature shutdown given its 150°C Tj operating limit?
The VIPER15LD operates at 136kHz and is rated for 10W, which can generate substantial heat, especially in a compact surface-mount package like the 16-SOIC. To prevent over-temperature shutdown (which is a built-in fault protection), meticulous thermal management is crucial. This involves careful PCB layout to maximize copper pour around the VIPER15LD to act as a heatsink. Consider the thermal resistance of the PCB material and the ambient operating temperature of the final product. Component placement should minimize exposure to other heat-generating components. If thermal simulation indicates junction temperatures may approach 150°C under worst-case load and ambient conditions, consider using a component with better thermal dissipation or exploring external heatsinking solutions, though this may complicate a compact design. Regularly check the thermal performance under load during prototype testing.
In a scenario where a direct replacement for a failed VIPER15LD is required in an existing field unit, and considering the obsolescence, what critical design parameters must be verified when substituting with a part like the VIPER16LD to avoid introducing new failure modes?
When substituting a failed VIPER15LD with a compatible part like the VIPER16LD in a field unit, careful verification is paramount to avoid introducing new failure modes. While they belong to the same family, check the following: **Pin compatibility is usually straightforward, but verify it.** Crucially, confirm that the VIPER16LD's startup voltage (Vcc/Vdd range) and operating voltage ranges are compatible with your existing Vcc capacitor and power rails. Also, examine the switching frequency and its impact on your transformer design and feedback loop stability. The fault protection thresholds (current limiting, OVP, OTP) might differ subtly; ensure they provide equivalent or better protection for your system. Finally, evaluate the thermal resistance (junction-to-ambient) of the VIPER16LD in its package compared to the VIPER15LD to ensure it can dissipate heat effectively in the same PCB footprint without overheating.
For an isolated flyback power supply targeting <10W output, what are the potential engineering uncertainties or risks associated with the VIPER15LD's internal switch breakdown voltage of 800V and its 136kHz switching frequency when dealing with AC line voltage transients?
The VIPER15LD's 800V breakdown voltage provides a good margin against typical AC line voltage, but AC line transients and surges can exceed this if not properly addressed. The primary engineering uncertainty here is the effectiveness of your AC input filtering and surge protection circuitry in clamping these transients before they reach the VIPER15LD. While the internal over-voltage protection is helpful, it's a last resort. Operating at 136kHz means that parasitic inductances in the input traces and surrounding components can resonate with capacitance during fast transients, potentially causing voltage spikes exceeding the 800V limit, leading to premature failure. Ensure your surge protection (e.g., MOVs, TVS diodes) and input filtering are adequately rated and positioned to absorb transient energy effectively. Consider an input fuse and transient voltage suppression network designed to meet relevant safety standards for your target market.
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.
VIPER15LD CAD Models
STMicroelectronics VIPER15LD PCB symbols & footprints
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