VIPER22A SMPS Controller IC: Circuit, Equivalent and Datasheet

Sophie

Published: 15 September 2021 | Last Updated: 15 September 2021

35579

VIPER22AS

VIPER22AS

STMicroelectronics

8 Terminations 8V~38V VIPER22 AC to DC power converter VIPER™ Series 1 Outputs 60kHz

Purchase Guide

8 Terminations 8V~38V VIPER22 AC to DC power converter VIPER™ Series 1 Outputs 60kHz

VIPER22A is a switched-mode power supply controller IC manufactured by STMicroelectronics. This article mainly introduces circuit, equivalent, datasheet and other detailed information about STMicroelectronics VIPER22A.

In this video i will show you step by step procedure through which you can easily know the pin connection of VIPER22A.

How to Install IC VIPER22A to SMPS Correctly

VIPER22A Description

VIPER22A is a switched-mode power supply controller IC introduced by STMicroelectronics that has been extensively used in AC to DC Converters in offline power circuit designs. This controller IC consists of an in-built PWM controller with a power MOSFET.  The MOSFET is connected to the primary side of a power transformer which when switched will produce the required output voltage based on transformer design.


VIPER22A Pinout

VIPER22A Pinout.jpg

VIPER22A Pinout


Pin NumberPin NameDescription
1,2SourceSource pin of the switching MOSFET
3FeedbackFeedback for the SMPS circuit
4VDDVdd voltage 9V to 38V
5,6,7,8DrainDrain pin of the switching MOSFET


VIPER22A Pin Description


VIPER22A CAD Model

Footprint.png

Footprint

VIPER22A Features

●Operating Voltage: 9 Volts – 38 Volts

●Internal Oscillator Frequency: 60 kHz

●Drain to Source Voltage: 730 Volts

●Feedback Current: 3 mA

●Typical Peak Current Limit: 0.7 A

●Off-state Drain Current: 0.1 mA

●Fall Time: 100ns

●Rise Time: 50ns

●Input Feedback Impedance: 1.2 Kohms

●SMPS Switching Controller IC

●AC to DC converter

●Available in PDIP and SO 8-pin Package


Specifications

STMicroelectronics VIPER22AS technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics VIPER22AS.
  • Type
    Parameter
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Surface Mount
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    8-SOIC (0.154, 3.90mm Width)
  • Surface Mount

    having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.

    YES
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    -40°C~150°C TC
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Tube
  • Series

    In electronic components, the "Series" refers to a group of products that share similar characteristics, designs, or functionalities, often produced by the same manufacturer. These components within a series typically have common specifications but may vary in terms of voltage, power, or packaging to meet different application needs. The series name helps identify and differentiate between various product lines within a manufacturer's catalog.

    VIPER™
  • JESD-609 Code

    The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.

    e0
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Obsolete
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    1 (Unlimited)
  • Number of Terminations
    8
  • ECCN Code

    An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.

    EAR99
  • Terminal Finish

    Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.

    Tin/Lead (Sn/Pb)
  • Max Power Dissipation

    The maximum power that the MOSFET can dissipate continuously under the specified thermal conditions.

    7W
  • Terminal Position

    In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.

    DUAL
  • Terminal Form

    Occurring at or forming the end of a series, succession, or the like; closing; concluding.

    GULL WING
  • Peak Reflow Temperature (Cel)

    Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.

    NOT SPECIFIED
  • Number of Functions
    1
  • Reach Compliance Code

    Reach Compliance Code refers to a designation indicating that electronic components meet the requirements set by the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation in the European Union. It signifies that the manufacturer has assessed and managed the chemical substances within the components to ensure safety and environmental protection. This code is vital for compliance with regulations aimed at minimizing risks associated with hazardous substances in electronic products.

    not_compliant
  • Frequency

    In electronic components, the parameter "Frequency" refers to the rate at which a signal oscillates or cycles within a given period of time. It is typically measured in Hertz (Hz) and represents how many times a signal completes a full cycle in one second. Frequency is a crucial aspect in electronic components as it determines the behavior and performance of various devices such as oscillators, filters, and communication systems. Understanding the frequency characteristics of components is essential for designing and analyzing electronic circuits to ensure proper functionality and compatibility with other components in a system.

    66kHz
  • Time@Peak Reflow Temperature-Max (s)

    Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.

    NOT SPECIFIED
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    VIPER22
  • Pin Count

    a count of all of the component leads (or pins)

    8
  • JESD-30 Code

    JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.

    R-PDSO-G8
  • Number of Outputs
    1
  • Qualification Status

    An indicator of formal certification of qualifications.

    Not Qualified
  • Input Voltage-Nom

    Input Voltage-Nom refers to the nominal or rated input voltage that an electronic component or device is designed to operate within. This parameter specifies the voltage level at which the component is expected to function optimally and safely. It is important to ensure that the actual input voltage supplied to the component does not exceed this nominal value to prevent damage or malfunction. Manufacturers provide this specification to guide users in selecting the appropriate power supply or input voltage source for the component. It is a critical parameter to consider when designing or using electronic circuits to ensure reliable performance and longevity of the component.

    18V
  • Analog IC - Other Type

    Analog IC - Other Type is a parameter used to categorize electronic components that are integrated circuits (ICs) designed for analog signal processing but do not fall into more specific subcategories such as amplifiers, comparators, or voltage regulators. These ICs may include specialized analog functions such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), voltage references, or signal conditioning circuits. They are typically used in various applications where precise analog signal processing is required, such as in audio equipment, instrumentation, communication systems, and industrial control systems. Manufacturers provide detailed specifications for these components to help engineers select the most suitable IC for their specific design requirements.

    SWITCHING REGULATOR
  • Voltage - Supply (Vcc/Vdd)

    Voltage - Supply (Vcc/Vdd) is a key parameter in electronic components that specifies the voltage level required for the proper operation of the device. It represents the power supply voltage that needs to be provided to the component for it to function correctly. This parameter is crucial as supplying the component with the correct voltage ensures that it operates within its specified limits and performance characteristics. It is typically expressed in volts (V) and is an essential consideration when designing and using electronic circuits to prevent damage and ensure reliable operation.

    8V~38V
  • Input Voltage (Min)

    Input Voltage (Min) is a parameter in electronic components that specifies the minimum voltage level required for the component to operate properly. It indicates the lowest voltage that can be safely applied to the component without causing damage or malfunction. This parameter is crucial for ensuring the reliable and safe operation of the component within its specified operating range. It is important for designers and engineers to consider the minimum input voltage requirement when selecting and using electronic components in their circuits to prevent potential issues such as underperformance or failure.

    9V
  • Topology

    In the context of electronic components, "topology" refers to the arrangement or configuration of the components within a circuit or system. It defines how the components are connected to each other and how signals flow between them. The choice of topology can significantly impact the performance, efficiency, and functionality of the electronic system. Common topologies include series, parallel, star, mesh, and hybrid configurations, each with its own advantages and limitations. Designers carefully select the appropriate topology based on the specific requirements of the circuit to achieve the desired performance and functionality.

    Flyback
  • Control Mode

    In electronic components, "Control Mode" refers to the method or mode of operation used to regulate or control the behavior of the component. This parameter determines how the component responds to input signals or commands to achieve the desired output. The control mode can vary depending on the specific component and its intended function, such as voltage regulation, current limiting, or frequency modulation. Understanding the control mode of an electronic component is crucial for proper integration and operation within a circuit or system.

    CURRENT-MODE
  • Output Current-Max

    Output Current-Max is a parameter in electronic components that specifies the maximum amount of current that can be safely drawn from the output of the component without causing damage. It is an important specification to consider when designing circuits to ensure that the component can handle the required current without overheating or failing. Exceeding the maximum output current can lead to performance issues, component damage, or even complete failure of the circuit. It is crucial to adhere to the specified maximum output current to ensure the reliable operation of the electronic component and the overall circuit.

    0.84A
  • Frequency - Switching

    "Frequency - Switching" in electronic components refers to the rate at which a device, such as a transistor or switching regulator, turns on and off during operation. This parameter is crucial in determining the efficiency and performance of power converters, oscillators, and other circuits that rely on rapid switching. Higher switching frequencies typically allow for smaller component sizes but may require more advanced design considerations to manage heat and electromagnetic interference.

    60kHz
  • Input Voltage (Max)

    Input Voltage (Max) refers to the maximum voltage that an electronic component can safely handle without getting damaged. This parameter is crucial for ensuring the proper functioning and longevity of the component. Exceeding the maximum input voltage can lead to overheating, electrical breakdown, or even permanent damage to the component. It is important to carefully consider and adhere to the specified maximum input voltage when designing or using electronic circuits to prevent any potential issues or failures.

    38V
  • Control Technique

    In electronic components, "Control Technique" refers to the method or approach used to regulate and manage the operation of the component. This parameter is crucial in determining how the component functions within a circuit or system. Different control techniques can include analog control, digital control, pulse-width modulation (PWM), and various feedback mechanisms. The choice of control technique can impact the performance, efficiency, and overall functionality of the electronic component. It is important to select the appropriate control technique based on the specific requirements and characteristics of the application in which the component will be used.

    PULSE WIDTH MODULATION
  • Switcher Configuration

    Switcher Configuration in electronic components refers to the arrangement or setup of a switcher circuit, which is a type of power supply that converts one form of electrical energy into another. The configuration of a switcher circuit includes the specific components used, such as transistors, diodes, capacitors, and inductors, as well as their interconnections and control mechanisms. The switcher configuration determines the efficiency, voltage regulation, and other performance characteristics of the power supply. Different switcher configurations, such as buck, boost, buck-boost, and flyback, are used for various applications depending on the desired output voltage and current requirements. Understanding and selecting the appropriate switcher configuration is crucial in designing reliable and efficient power supply systems for electronic devices.

    SINGLE
  • Internal Switch(s)

    The term "Internal Switch(s)" in electronic components typically refers to a built-in mechanism within a device that allows for the control of electrical current flow. These internal switches can be used to turn circuits on or off, change the direction of current, or regulate the flow of electricity within the component. They are often designed to be controlled externally, either manually or automatically, to enable various functions or operations within the electronic device. Internal switches play a crucial role in the overall functionality and performance of electronic components by providing a means to manage and manipulate electrical signals effectively.

    Yes
  • Fault Protection

    Protection against electric shock under. single fault conditions.

    Current Limiting, Over Temperature, Over Voltage
  • Output Isolation

    Output isolation in electronic components refers to the degree to which the output signal is electrically separated or isolated from the input signal or other parts of the circuit. This isolation is important for preventing interference, noise, or voltage fluctuations from affecting the output signal. It helps maintain signal integrity and ensures that the output remains stable and accurate. Output isolation can be achieved through various methods such as using transformers, optocouplers, or isolation amplifiers to physically separate the input and output circuits electrically. This parameter is particularly crucial in applications where there is a need to protect sensitive components or ensure reliable communication between different parts of a system.

    Isolated
  • Voltage - Breakdown

    Voltage - Breakdown is a parameter that refers to the maximum voltage that an electronic component can withstand before it breaks down and allows current to flow through it uncontrollably. This breakdown voltage is a critical specification for components like diodes, transistors, and capacitors, as exceeding this voltage can lead to permanent damage or failure of the component. Manufacturers typically provide this information in datasheets to help engineers and designers ensure the proper operation and reliability of their circuits. It is important to consider the breakdown voltage when designing circuits to prevent overvoltage conditions that could compromise the performance and longevity of the components.

    730V
  • Voltage - Start Up

    Voltage - Start Up is a parameter in electronic components that refers to the minimum voltage required for the component to begin operating or start up properly. It is a critical specification as it determines the point at which the component can initiate its functions and operate within its specified performance range. This parameter is particularly important in power supplies, integrated circuits, and other electronic devices where a stable and sufficient voltage level is necessary for reliable operation. Designers and engineers must ensure that the input voltage meets or exceeds the specified start-up voltage to prevent issues such as malfunctioning or damage to the component.

    14.5V
  • Length
    4.9mm
  • Width
    3.9mm
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    ROHS3 Compliant
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Lead Free
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VIPER22A Circuit

Circuit.png

Example Circuit

As you can see in the example circuit above, the transformer plays an important role in the overall design. It has three coils, namely primary, secondary and auxiliary (the second coil on the primary side). The primary side of the transformer is connected to the rectified power supply voltage through the MOSFET in the Viper controller IC, and the power supply DC will be switched according to the feedback to the IC. The auxiliary coil of the transformer is used to power the Viper IC, and the secondary side of the transformer provides the required output voltage.


VIPER22A Equivalent

VIPER12A, AP8012


VIPER22A Alternatives

Part NumberDescriptionManufacturer
KA5L0165R-TUPOWER CIRCUITS4 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PSFM4, TO-220F, 4 PINFairchild Semiconductor Corporation
FSDM0365RNPOWER CIRCUITS12A SWITCHING REGULATOR, 73kHz SWITCHING FREQ-MAX, PDIP8, MS-001BA, DIP-8Rochester Electronics LLC
TNY256YPOWER CIRCUITSSwitching Controller, Current-mode, 140kHz Switching Freq-Max, PDSO5, TO-220, 5 PINPower Integrations
FSDM0265RNBPOWER CIRCUITSSwitching Regulator, Current-mode, 8A, 73kHz Switching Freq-Max, PDIP8, MS-001BA, DIP-8Fairchild Semiconductor Corporation
TNY256PPOWER CIRCUITSSwitching Controller, Current-mode, 140kHz Switching Freq-Max, PDSO8, 0.300 INCH, PLASTIC, MS-001AB, DIP-8Power Integrations
KA5L0380RPOWER CIRCUITSSwitching RegulatorON Semiconductor
MC33369TPOWER CIRCUITSSwitching Regulator, Voltage-mode, 0.5A, 115kHz Switching Freq-Max, CMOS, PSFM5, TO-220, 5 PINMotorola Semiconductor Products
TNY268PGPOWER CIRCUITSSwitching Regulator, 0.88A, 140kHz Switching Freq-Max, PDIP7, 0.300 INCH, LEAD-FREE, PLASTIC, MS-001-AB, DIP-8Power Integrations
TEA1623P/N1,112POWER CIRCUITSTEA1623P; TEA1623PH - STARplug switched-mode power supply controller IC DIP 8-PinNXP Semiconductors
TOP209PNPOWER CIRCUITSSwitching Regulator, Voltage-mode, 0.1A, 85kHz Switching Freq-Max, CMOS, PDIP8, PLASTIC, MS-001AB, DIP-8Power Integrations


VIPER22A Benefits

– Large input voltage range on the VDD pin accommodates changes in auxiliary supply voltage. This feature is well adapted to battery charger adapter configurations.

– Automatic burst mode in low load condition.

– Overvoltage protection in hiccup mode.


VIPER22A Applications

■Used in Low Power Supply Systems

■Used in LED Drivers

■Used in Remote Microcontroller Designs

■Used in SMPS Circuits

■Used in Auxiliary Power Supply

■Used in Industrial Applications

■Used in Battery Chargers

■Used in Automobiles


VIPER22A Mechanical Data

Mechanical Data.png

VIPER22A Mechanical Data

VIPER22A Manufacturer

STMicroelectronics is a French-Italian multinational electronics and semiconductor manufacturer, headquartered in Plan-les-Oates near Geneva, Switzerland. 


The company originated from the merger of two state-owned semiconductor companies in 1987: "Thomson Semiconductors" in France and "SGS Microelettronica" in Italy. 


It is often referred to as "ST" and is the largest semiconductor chip manufacturer in Europe by revenue. STMicroelectronics corporate headquarters and EMEA regional headquarters are located in Geneva, while the holding company STMicroelectronics N.V. is incorporated in the Netherlands. 


The company's US headquarters are located in Koper, Texas. The Asia-Pacific region is headquartered in Singapore, while the Japan and South Korea operations are headquartered in Tokyo. The headquarter of the company in China is in Shanghai.


Datasheet PDF

Download datasheets and manufacturer documentation for STMicroelectronics VIPER22AS.
Frequently Asked Questions

1.What is the difference between VIPER22A and VIPER12A?

The power is not the same. The power of VIPER22 is greater than that of VIPER12. The package form and pin arrangement are the same. 22 can replace 12.

2.Can VIPER22A and UC3842A be interchangeable in a switching power supply?

VIPER22A is a low-power single-chip power supply IC, and UC3842A is a high-performance power supply PWM controller.
The two are completely different and cannot be interchanged.

3.Can VIPER22A be directly replaced with FT24C08?

VIPER22A can be directly replaced with FT24C08. They are PIN to PIN, the internal structure is exactly the same, but the built-in MOSFET power is different, but the high-power VIPER22A can directly replace the low-power FT24C08.
VIPER22AS

STMicroelectronics

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