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VIPER50ASP
STMicroelectronics
IC OFFLINE SW FLBACK 10POWERSO
17350 Pcs New Original In Stock
Converter Offline Flyback Topology Up to 200kHz 10-PowerSO
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5.0 / 5.0
- (106 Ratings)
VIPER50ASP
Product Overview
8166109
DiGi Electronics Part Number
VIPER50ASP-DGManufacturer
STMicroelectronics
VIPER50ASP
Description
IC OFFLINE SW FLBACK 10POWERSOInventory
17350 Pcs New Original In Stock
Converter Offline Flyback Topology Up to 200kHz 10-PowerSO
Quantity
Minimum 1
Minimum 1
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VIPER50ASP Technical Specifications
Category
Power Management (PMIC), AC DC Converters, Offline Switches
Packaging
-
Series
VIPER™
Product Status
Obsolete
Output Isolation
Isolated
Internal Switch(s)
Yes
Voltage - Breakdown
700V
Topology
Flyback
Voltage - Start Up
11 V
Voltage - Supply (Vcc/Vdd)
8V ~ 15V
Duty Cycle
-
Frequency - Switching
Up to 200kHz
Power (Watts)
50 W
Fault Protection
Current Limiting, Over Temperature
Control Features
Frequency Control, Soft Start, Sync
Operating Temperature
-
Package / Case
PowerSO-10 Exposed Bottom Pad
Supplier Device Package
10-PowerSO
Mounting Type
Surface Mount
Base Product Number
VIPER50
Datasheet & Documents
HTML Datasheet
VIPER50ASP-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
Q2136235A
Standard Package
1,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
물류 추적 시스템이 매우 정밀하고 사용자 친화적이라서 좋아요. 정시 배송 보장도 마음에 들어요.
December 02, 2025
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December 02, 2025
Quality, affordability, and sustainability—DiGi has nailed it.
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Frequently Asked Questions (FAQ)
Can the VIPER50ASP be safely used in a 48W offline power supply design despite being listed as obsolete, and what are the key reliability risks if I proceed with new production?
While the VIPER50ASP is electrically capable of supporting a 48W flyback converter within its 50W rating and 700V breakdown voltage, using an obsolete part like the VIPER50ASP in new production introduces significant supply chain and long-term reliability risks. STMicroelectronics no longer guarantees future availability or provides active technical support, which may lead to last-time buy scenarios or unexpected shortages. Additionally, without ongoing qualification updates, long-term field reliability under thermal cycling or high-humidity conditions cannot be assured. For new designs, consider migrating to a supported successor such as the VIPER22A or VIPER12A (for lower power) or the newer VIPER37 series, which offer improved efficiency, enhanced protection features, and full RoHS compliance—critical for global market access and sustainability.
What design modifications are required if replacing the VIPER50ASP with a modern alternative like the VIPER37L in an existing 24V/2A flyback converter layout originally designed for PowerSO-10 packaging?
Replacing the VIPER50ASP with the VIPER37L requires careful evaluation of pin compatibility, thermal management, and control loop stability. Although both use a PowerSO-10 package with an exposed pad, the VIPER37L has a different pinout and operates at higher switching frequencies (up to 130kHz vs. 200kHz max on VIPER50ASP), which may affect snubber design and EMI performance. You’ll need to verify gate drive timing, adjust the startup resistor network (since VIPER37L has a lower Vcc range), and potentially re-tune the feedback compensation due to differences in internal error amplifier characteristics. Also, ensure the PCB thermal pad is properly soldered and connected to ground, as the VIPER37L’s efficiency improvements rely on better heat dissipation. Always validate output regulation and transient response under full load before finalizing the replacement.
How does the lack of RoHS compliance in the VIPER50ASP impact its use in consumer electronics intended for the European market, and are there drop-in compliant alternatives?
The VIPER50ASP is non-RoHS compliant, which prohibits its use in consumer electronics sold in the European Union under the RoHS Directive (2011/65/EU). This creates a major regulatory barrier, as non-compliant components can lead to product rejection at customs, fines, or forced recalls. There is no true drop-in RoHS-compliant replacement due to the VIPER50ASP’s obsolescence, but functionally equivalent and fully compliant alternatives exist—such as the VIPER22A (in PowerSO-10) or the newer VIPER37HE, which offer similar offline flyback performance with improved green credentials. These parts also include enhanced protections like hiccup-mode overcurrent and reduced standby power, making them better suited for modern eco-design requirements. A redesign is strongly recommended to ensure market access and future-proofing.
What are the critical layout considerations when using the VIPER50ASP in a high-density PCB design to avoid false triggering of its over-temperature protection during sustained 40W operation?
To prevent premature over-temperature shutdown in the VIPER50ASP during sustained 40W operation, proper thermal layout is essential. The exposed bottom pad (PowerSO-10) must be soldered to a sufficiently large copper pour (≥200mm² recommended) connected to the ground plane with multiple vias to enhance heat sinking. Keep high-di/dt switching loops (primary switch, transformer, and output rectifier) as short as possible to reduce parasitic inductance and voltage spikes that increase switching losses. Avoid placing thermally sensitive components near the VIPER50ASP, and ensure adequate airflow if enclosed. Additionally, verify that the ambient temperature around the device stays below 70°C; otherwise, derating may be necessary. Poor thermal design can cause the internal junction temperature to exceed 150°C even at moderate loads, triggering protection and leading to unstable output behavior.
Can the VIPER50ASP operate reliably in a 230VAC input offline converter without an external startup resistor, leveraging only its internal high-voltage startup circuitry?
Yes, the VIPER50ASP integrates a high-voltage startup circuit that activates once the input voltage reaches 11V (typical), allowing it to begin switching without an external startup resistor in most 230VAC applications. However, this internal startup mechanism draws current directly from the drain pin during initial power-up, which increases stress on the internal MOSFET and can reduce long-term reliability under frequent power cycling or brownout conditions. For improved robustness—especially in regions with unstable mains—it’s advisable to use an external startup resistor (e.g., 100kΩ, 2W) to offload the internal circuitry once Vcc reaches 8V. This hybrid approach reduces thermal stress on the VIPER50ASP and enhances system-level MTBF. Always validate startup behavior under low-line (180VAC) and high-line (265VAC) conditions to ensure consistent operation across the full input range.
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.
VIPER50ASP CAD Models
STMicroelectronics VIPER50ASP PCB symbols & footprints
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