Specifications
| Attribute | Value |
| Package | Tube |
| Series | VIPER™ |
| ProductStatus | Obsolete |
| OutputIsolation | Non-Isolated |
| InternalSwitch(s) | Yes |
| Voltage-Breakdown | 730V |
| Voltage-StartUp | 14.5 V |
| Voltage-Supply(Vcc/Vdd) | 9V ~ 38V |
| Frequency-Switching | 60kHz |
| Power(Watts) | 8 W |
| FaultProtection | Current Limiting, Over Temperature, Over Voltage |
| OperatingTemperature | -40°C ~ 150°C (TC) |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
| SupplierDevicePackage | 8-SOIC |
Overview
Description
The VIPER12AS is a high-voltage converter integrated circuit (IC) widely used in power supply applications. Manufactured by STMicroelectronics, it combines a PWM controller with a power MOSFET in a single package, aimed at reducing component count and minimizing space in power electronic circuits. The VIPER12AS is designed for off-line power supplies, offering features like overcurrent protection, thermal shutdown, and a low standby power mode, which is beneficial for energy-efficient designs. It operates in a flyback topology, suitable for applications requiring isolated outputs, and can handle universal mains input voltage.
This IC is particularly beneficial for compact and cost-effective power designs, such as those found in consumer electronics, industrial systems, and household appliances. Its versatility and integration allow for simplified circuit design, enhancing reliability and reducing time-to-market. The VIPER12AS supports a range of power supply needs, offering designers flexibility and efficiency in their projects.
This IC is particularly beneficial for compact and cost-effective power designs, such as those found in consumer electronics, industrial systems, and household appliances. Its versatility and integration allow for simplified circuit design, enhancing reliability and reducing time-to-market. The VIPER12AS supports a range of power supply needs, offering designers flexibility and efficiency in their projects.
Equivalent
The VIPER12AS is a monolithic IC used for low-power SMPS (Switched Mode Power Supply) applications. Equivalent products include:
1. Power Integrations TinySwitch series (e.g., TNY264)
2. ON Semiconductor NCP1014 series
3. STMicroelectronics VIPER22A or VIPER17
4. Fairchild Power Switch (FPS) series (e.g., FSDH321)
5. Infineon ICE2Axxxx series
These alternatives offer similar functionality, integrating a PWM controller and a power MOSFET for compact power supply designs.
1. Power Integrations TinySwitch series (e.g., TNY264)
2. ON Semiconductor NCP1014 series
3. STMicroelectronics VIPER22A or VIPER17
4. Fairchild Power Switch (FPS) series (e.g., FSDH321)
5. Infineon ICE2Axxxx series
These alternatives offer similar functionality, integrating a PWM controller and a power MOSFET for compact power supply designs.
Features
The VIPER12AS is a high-performance integrated switcher from STMicroelectronics, designed primarily for off-line power supply applications. Key features include:
1. Integrated Power MOSFET: It contains a 730V avalanche-rugged power MOSFET, which simplifies the design and minimizes the component count.
2. Wide Input Voltage Range: It supports a range of 85V to 265V, making it suitable for universal input applications.
3. High Efficiency: The device operates in discontinuous conduction mode (DCM) with an efficiency optimized for low standby power consumption.
4. Low Standby Power: It includes a burst mode operation that reduces power consumption during no-load or light-load conditions.
5. Current-Mode Control: This feature provides good regulation over line and load variations.
6. Protections: It offers comprehensive protection features, including overload, over-temperature, open-loop, and short-circuit protection.
7. Start-Up Current Source: An embedded start-up current source facilitates self-biasing from the high-voltage rail, eliminating the need for external components.
These features make the VIPER12AS suitable for a variety of applications, including power adapters, auxiliary supplies, and consumer electronics.
1. Integrated Power MOSFET: It contains a 730V avalanche-rugged power MOSFET, which simplifies the design and minimizes the component count.
2. Wide Input Voltage Range: It supports a range of 85V to 265V, making it suitable for universal input applications.
3. High Efficiency: The device operates in discontinuous conduction mode (DCM) with an efficiency optimized for low standby power consumption.
4. Low Standby Power: It includes a burst mode operation that reduces power consumption during no-load or light-load conditions.
5. Current-Mode Control: This feature provides good regulation over line and load variations.
6. Protections: It offers comprehensive protection features, including overload, over-temperature, open-loop, and short-circuit protection.
7. Start-Up Current Source: An embedded start-up current source facilitates self-biasing from the high-voltage rail, eliminating the need for external components.
These features make the VIPER12AS suitable for a variety of applications, including power adapters, auxiliary supplies, and consumer electronics.
Pinout
The VIPER12AS is an integrated switch-mode power supply controller IC designed for applications such as AC-DC converters. It typically comes in an 8-pin configuration. Here is a brief overview of its pin functions:
1. Drain (Pin 1): This pin connects to the drain of the internal MOSFET, which serves as the output for the power switch.
2. Source (Pin 2): This is connected to the source of the internal MOSFET and is often linked to the primary ground in designs.
3. Feedback (Pin 3): This pin receives the feedback signal used for regulating the output voltage by controlling the duty cycle.
4. VDD (Pin 4): Supplies power to the chip and requires an external capacitor for stabilization.
5. N.C. (Pins 5-7): These are typically not connected and are reserved for future use or provide physical support for the chip.
6. VDD (Pin 8): Alternate VDD pin, often internally connected to pin 4.
The VIPER12AS is designed for high-voltage applications and includes features like overload protection, thermal shutdown, and overvoltage protection.
1. Drain (Pin 1): This pin connects to the drain of the internal MOSFET, which serves as the output for the power switch.
2. Source (Pin 2): This is connected to the source of the internal MOSFET and is often linked to the primary ground in designs.
3. Feedback (Pin 3): This pin receives the feedback signal used for regulating the output voltage by controlling the duty cycle.
4. VDD (Pin 4): Supplies power to the chip and requires an external capacitor for stabilization.
5. N.C. (Pins 5-7): These are typically not connected and are reserved for future use or provide physical support for the chip.
6. VDD (Pin 8): Alternate VDD pin, often internally connected to pin 4.
The VIPER12AS is designed for high-voltage applications and includes features like overload protection, thermal shutdown, and overvoltage protection.
Manufacturer
The VIPER12AS is manufactured by STMicroelectronics, a semiconductor company. STMicroelectronics is a global leader in the design, development, manufacturing, and marketing of a wide range of semiconductor products. The company serves various sectors including industrial, automotive, personal electronics, and communication equipment. STMicroelectronics is known for producing integrated circuits and discrete devices used in a variety of electronic applications.
Application
The VIPER12AS is a versatile power IC commonly used in applications requiring compact and efficient power management. Its primary application areas include:
1. Switch-Mode Power Supplies (SMPS): Used in AC-DC converters for household appliances, consumer electronics, and industrial equipment.
2. LED Drivers: Provides efficient power conversion for LED lighting systems.
3. Standby Power Supplies: Utilized in devices requiring low standby power consumption.
4. Battery Chargers: Employed in portable electronics and rechargeable devices for efficient charging solutions.
5. Telecommunications: Powers communication devices and network equipment with reliable voltage regulation.
Its integrated high-voltage start-up, low standby power, and protection features make it suitable for these and other low to medium power applications.
1. Switch-Mode Power Supplies (SMPS): Used in AC-DC converters for household appliances, consumer electronics, and industrial equipment.
2. LED Drivers: Provides efficient power conversion for LED lighting systems.
3. Standby Power Supplies: Utilized in devices requiring low standby power consumption.
4. Battery Chargers: Employed in portable electronics and rechargeable devices for efficient charging solutions.
5. Telecommunications: Powers communication devices and network equipment with reliable voltage regulation.
Its integrated high-voltage start-up, low standby power, and protection features make it suitable for these and other low to medium power applications.
Package
The VIPER12AS is typically packaged in a DIP-8 (Dual In-line Package) format. This package type is commonly used for small integrated circuits, providing a simple and cost-effective solution for through-hole mounting on printed circuit boards (PCBs).
