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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) - AC DC Converters, Offline Switchers > VIPER16LN
STMicroelectronics
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VIPER16LN

In Stock 42993 pcs Reference Price(In US Dollars)
1+
$0.261
Manufacturer Part Number:
VIPER16LN
Manufacturer / Brand
STMicroelectronics
Part of Description:
IC OFFLINE SWITCH MULT TOP 7DIP
Datasheets:
VIPER16LN(1).pdfVIPER16LN(2).pdfVIPER16LN(3).pdfVIPER16LN(4).pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 42993 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
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Part Number VIPER16LN
Manufacturer / Brand STMicroelectronics
Stock Quantity 42993 pcs Stock
Category Integrated Circuits (ICs) > Power Management (PMIC) - AC DC Converters, Offline Switchers
Description IC OFFLINE SWITCH MULT TOP 7DIP
Lead Free Status / RoHS Status: ROHS3 Compliant
RFQ VIPER16LN Datasheets VIPER16LN Details PDF
VIPER16LN Details PDF for FR.pdf
VIPER16LN Details PDF for IT.pdf
VIPER16LN Details PDF for ES.pdf
VIPER16LN Details PDF for DE.pdf
VIPER16LN Details PDF for KR.pdf
Voltage - Supply (Vcc/Vdd) 11.5V ~ 23.5V
Voltage - Start Up 13 V
Voltage - Breakdown 800V
Topology Buck, Buck-Boost, Flyback
Supplier Device Package 7-DIP
Series VIPer™ plus
Power (Watts) 10 W
Package / Case 8-DIP (0.300", 7.62mm), 7 Leads
Package Tube
Output Isolation Either
Operating Temperature -40°C ~ 150°C (TJ)
Mounting Type Through Hole
Internal Switch(s) Yes
Frequency - Switching 60kHz
Fault Protection Current Limiting, Over Temperature
Duty Cycle 70%
Control Features -
Base Product Number VIPER16

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


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VIPER16LN Product Details:

The VIPER16LN is a high-performance offline power converter integrated circuit (IC) from STMicroelectronics. Designed for a wide range of power supply applications, this PMIC (Power Management Integrated Circuit) supports buck, buck-boost, and flyback topologies, operating at a switching frequency of 60kHz.

The key features of the VIPER16LN include its wide input voltage range of 11.5V to 23.5V, making it suitable for a variety of input power sources. It can deliver up to 10W of output power, making it suitable for low to medium-power applications. The device is designed to be RoHS compliant and is packaged in a compact 7-DIP (Dual Inline Package) enclosure, allowing for easy integration into various electronic systems.

One of the notable design challenges addressed by the VIPER16LN is its ability to provide fault protection, including current limiting and over-temperature protection, ensuring reliable and safe operation. The device's wide operating temperature range of -40°C to 150°C (junction temperature) further enhances its suitability for use in diverse environmental conditions.

The VIPER16LN is primarily used in offline power supply applications, such as adapters, chargers, and low-power industrial equipment. Its versatile topology support and fault protection features make it a suitable choice for a wide range of power conversion needs.

In terms of compatibility, the VIPER16LN is part of the VIPer plus series from STMicroelectronics. While there may be equivalent or alternative models available from other manufacturers, the VIPER16LN provides a unique combination of features and specifications that may make it the preferred choice for certain applications.

VIPER16LN Image
VIPER16LN (1)

VIPER16LN Key Technical Attributes

Manufacturer Part Number: VIPER16LN

Manufacturer: STMicroelectronics

Series: VIPer plus

VIPER16LN Packing Size

Type: Tube

Material: DIP-7 Encapsulation

Size: 8-DIP (0.300", 7.62mm), 7 Leads

Pin Configuration: 7-DIP

Thermal Characteristics: Operating Temperature from -40°C ~ 150°C (TJ)

Electrical Properties: Voltage - Supply (Vcc/Vdd) 11.5 V ~ 23.5 V; Voltage - Breakdown 800V; Power (Watts) 10W

VIPER16LN Application

The VIPER16LN from STMicroelectronics is utilized in designing power conversion and distribution circuits which involves AC DC converters and offline switchers. This makes it suitable for applications in consumer electronics, smart home systems, telecommunications, and industrial equipment.

VIPER16LN Features

VIPER16LN supports converter offline buck, buck-boost, and flyback topology capable of operating at a switching frequency of 60kHz. It features internal switches with a high breakdown voltage of 800V and a power output capacity of 10 Watts. The device operates effectively within a voltage supply range of 11.5 V to 23.5 V and can startup at 13V with a maximum duty cycle of 70%. For protection, the device integrates features such as current limiting and over-temperature protection, supporting its use in reliable and safe power management circuits.

VIPER16LN Quality and Safety Features

Moisture Sensitivity Level (MSL) stands at 1 (Unlimited), which implies high reliability and stability under various environmental conditions. The Lead-free/RoHS Compliant status underscores commitment to environmental safety and quality.

VIPER16LN Compatibility

The VIPER16LN is a through-hole mounted device, compatible with standard DIP-7 interfaces, ensuring ease of integration into existing circuits without the need for special soldering or mounting techniques.

VIPER16LN Datasheet PDF

For a complete understanding and technical evaluation, the most authoritative datasheets for the VIPER16LN are available on our website. We recommend that customers download the datasheet directly from this page for accurate specifications and application guidance.

Quality Distributor

As a premium distributor, IC-Components proudly offers reliable and original products from STMicroelectronics. Experience seamless purchasing and guaranteed product authenticity when you get a quote directly from our website for the VIPER16LN. Take advantage of our robust customer support and swift delivery services for an unmatched purchasing experience.

Frequently Asked Questions

What are the key design considerations for using the VIPER16LN in an 85-265 VAC universal input offline flyback converter where I need to minimize component count and BOM cost?
The VIPER16LN is designed for high integration, featuring an 800V high-voltage MOSFET, PWM/PDM control, and extensive protection features, making it an excellent choice for low-component-count universal input flyback converters. For a typical universal input, focus on proper transformer design to handle the wide input voltage range and achieve the desired output power. Ensure the output capacitance is sufficient to meet ripple requirements at the lowest line voltage. The VIPER16LN’s internal current limiting and over-temperature protection simplify design, but careful selection of external components like the current sense resistor and snubber network is crucial for reliable operation and EMI compliance. The 13V startup voltage (Vcc/Vdd) requirement needs to be met by the auxiliary winding or a pre-charge resistor, especially at low AC input voltages.
When migrating from an older VIPER16 device to the VIPER16LN, what are the potential design implications for a 12V DC-DC buck converter application, and are there any major performance trade-offs?
The VIPER16LN is an evolution of the VIPER16 series, offering similar core functionality. When migrating, the primary considerations for a 12V DC-DC buck converter would be the voltage supply range for Vcc/Vdd (11.5 V ~ 23.5 V) and the startup voltage (13V). Ensure your auxiliary power supply can reliably provide these voltages. The 60kHz switching frequency is consistent, so existing transformer and inductor designs may be compatible, but re-evaluation for optimal efficiency at the new part's characteristics is recommended. The VIPER16LN benefits from enhanced fault protection (current limiting, over temperature), which can simplify external circuitry and improve robustness. Double-check the transformer turns ratio and external component values to ensure they are optimized for the VIPER16LN's specific characteristics and your target output.
I'm designing a compact, isolated 5V/10W power supply for industrial equipment operating in a harsh environment with potential for voltage transients. How does the VIPER16LN's 800V breakdown voltage and integrated fault protection contribute to reliability in such scenarios?
The VIPER16LN's 800V breakdown voltage is a significant advantage for industrial applications, providing a substantial safety margin against AC line surges and transients that can occur in harsh environments. This higher voltage rating reduces the need for extensive external surge protection components. Furthermore, the integrated current limiting and over-temperature protection actively monitor the device's operating conditions. In case of overcurrent or thermal stress, the VIPER16LN will shut down, preventing catastrophic failure and protecting the power supply from damage. This inherent protection, combined with the through-hole DIP-7 package which offers good thermal dissipation and robustness compared to surface-mount alternatives, makes the VIPER16LN a reliable choice for demanding industrial applications.
What are the practical limitations of using the VIPER16LN for a 24V system with a requirement for high peak output current beyond its rated 10W continuous power?
The VIPER16LN is rated for 10W continuous output power and has a maximum duty cycle of 70%. While it can handle transient peaks, operating significantly beyond its 10W rating continuously, even in a 24V system, will lead to thermal runaway and device failure. The internal MOSFET's current handling capability and the device's thermal dissipation limits are the primary constraints. For applications requiring higher peak currents, a larger transformer, a higher rated current sense resistor to trigger protection appropriately, and potentially external components for pre-charging or soft-start might be necessary to manage the inrush current without exceeding the VIPER16LN's capabilities. If sustained output beyond 10W is needed, a different IC with a higher power rating would be more suitable.
How can I configure the VIPER16LN for a buck-boost topology to achieve a positive output voltage from a variable DC input, and what specific external components are critical for stability and performance?
The VIPER16LN supports buck-boost topology, which is ideal for generating a positive output voltage from a variable DC input. To implement this, you will need to configure the external inductor and capacitor network appropriately. The switching node will be connected to the inductor, with one end of the inductor connected to the DC input and the other end connected to the switching output of the VIPER16LN. The output capacitor will be connected across the load. Critical external components for stability include the output capacitor's ESR (Equivalent Series Resistance) and capacitance value, which must be chosen to meet the desired output ripple and transient response. The inductor's saturation current rating must also be sufficient to handle the peak inductor current dictated by the input voltage and desired output. The feedback loop components (resistors and potentially a capacitor) are also crucial for regulating the output voltage and ensuring stability across the input voltage range.
I'm replacing a legacy offline switcher with the VIPER16LN in a 230V AC to 12V/0.8A application. What are the most common pitfalls when selecting an alternative to a specific branded part like a TNY267PN, and what are the primary design implications for the VIPER16LN?
When replacing a TNY267PN with a VIPER16LN in a 230V AC to 12V/0.8A application, the primary pitfalls involve matching not just the basic specifications but also the subtle performance characteristics and pinouts. While both are offline switchers, the VIPER16LN has an 800V breakdown voltage compared to the TNY267PN's typical 700V, offering improved transient immunity. The VIPER16LN's 60kHz switching frequency is comparable, but its internal MOSFET characteristics and control loop behavior may differ. Design implications include re-evaluating the transformer design (turns ratio, core material, inductance) to account for any differences in efficiency and voltage/current handling. The feedback network, current sense resistor value, and snubber circuit may need adjustments to optimize performance and ensure compliance with EMI standards. The startup voltage (13V for VIPER16LN) also needs to be considered for the auxiliary winding design. Always test thoroughly to confirm proper operation and stability.
How does the VIPER16LN's -40°C to 150°C operating temperature range (TJ) impact its suitability for automotive applications where under-hood temperatures can fluctuate significantly, and what thermal management strategies are recommended?
The VIPER16LN's wide operating temperature range of -40°C to 150°C (junction temperature) is a significant advantage for automotive applications, allowing it to withstand the extreme temperature fluctuations experienced under the hood. However, to reliably operate at the higher end of this range, effective thermal management is critical. The DIP-7 package is through-hole, which offers some thermal dissipation, but for continuous operation near its power limits in a high-temperature environment, it's essential to design the PCB layout to facilitate heat sinking. This may involve using wider copper traces connected to the device's pins to spread heat, and potentially incorporating a small heatsink attached to the package if maximum performance is required at elevated ambient temperatures. Ensure the ambient temperature and the power dissipated by the VIPER16LN do not cause the junction temperature (TJ) to exceed 150°C.
What is the startup voltage for the VIPER16LN, and what are the implications for designing the auxiliary winding or startup resistor for a 115V AC input power supply?
The startup voltage for the VIPER16LN is 13V. This means the Vcc/Vdd pin needs to reach 13V for the device to begin switching. For a 115V AC input power supply, the auxiliary winding or startup resistor must be designed to charge the Vcc/Vdd capacitor to this voltage reliably, even at the lowest AC input line voltage and full load. At 115V AC, the charging current through the startup resistor or auxiliary winding may be limited, so careful selection of the resistor value or the transformer turns ratio for the auxiliary winding is necessary to ensure prompt and reliable startup without causing excessive power dissipation in the startup component.
When integrating the VIPER16LN into a system requiring precise output voltage regulation under varying load conditions, how does its 70% duty cycle limit affect the overall control loop design, especially for a flyback converter?
The VIPER16LN's 70% maximum duty cycle is a key parameter in flyback converter design, particularly when considering a wide input voltage range and varying load conditions. For a flyback topology, the duty cycle is directly related to the input voltage and the desired output voltage. At low input voltages and high loads, the duty cycle will be at its maximum. If the required duty cycle at minimum input voltage and maximum load exceeds 70%, the VIPER16LN may not be able to regulate the output, leading to reduced output voltage. Therefore, when designing, ensure that the minimum input voltage scenario, combined with the maximum expected load, results in a duty cycle comfortably below 70% to maintain stable regulation. This might necessitate choosing a transformer with a different turns ratio or considering a device with a higher duty cycle capability if operating conditions push this limit.
What are the key differences in power handling and efficiency between the VIPER16LN and older offline switchers like the VIPER10LN, and are there any specific application areas where the VIPER16LN offers a distinct advantage?
The VIPER16LN, part of the "VIPer plus" series, generally offers improved performance over older parts like the VIPER10LN. While specific efficiency curves should be consulted, the VIPER16LN typically features a higher breakdown voltage (800V vs. typically lower for VIPER10LN) and often optimized internal MOSFET characteristics for better conduction and switching losses. The 10W power rating is a specific model designation and should be compared to the particular VIPER10LN variant. The VIPER16LN's enhanced integration, particularly its robust protection features and potentially wider operating voltage range for Vcc/Vdd, can simplify design and improve reliability. It's particularly advantageous in applications where AC line transients are a concern, or where a slightly higher power output with greater design margin is desired compared to older, lower-power-rated devices.

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