VIPER12A IC Pinout, Circuit, Datasheet and Equivalent (Pin Video Attached)

What is the VIPER12A IC

The VIPER12A stands as a comprehensive SMPS controller IC featuring an integrated PWM controller paired with a potent power MOSFET on a single silicon chip. This integration enables efficient conversion of a wide AC input voltage range spanning from 85V to 265V into lower-level output voltages, such as 5V.

It adeptly handles output currents ranging from 10mA to 200mA. The dedicated current mode PWM controller, merged with a high-voltage power MOSFET within a single chip, ensures optimal performance in power supply applications, allowing for compact designs and efficient power conversion.

VIPER12A IC Pinout

Pinout Configuration

Pin details of IC VIPer 12A -- Video

Here is a video about viper12a ic chip pin explained,

VIPER12A IC Specifications

• Fixed 60 kHz switching frequency
• 9 V to 38 V wide range VDD voltage
• Current mode control
• Auxiliary undervoltage lockout with hysteresis
• High voltage start-up current source
• Overtemperature, overcurrent and overvoltage protection with auto-restart
• Typical power capability
• – European (195 - 265 Vac) 8 W for SO-8, 13 W for DIP-8
• – European (85 - 265 Vac) 5 W for SO-8, 8 W for DIP-8

IC VIPER12A Circuit Diagram

Block Diagram

Current and voltage conventions

Rectangular U-I output characteristics for battery charger

It demonstrates a regulation setup employing a TSM101-driven optocoupler with dual operational amplifiers and a voltage reference. This configuration enables precise control of both output voltage and current. By combining the error signals using an integrated OR function, it creates a rectangular output characteristic, beneficial for applications like battery chargers. This setup excels in delivering a defined charging rate in current mode, crucial for various battery types, especially for Li-ion batteries that demand accurate voltage regulation along with current control.

ViperA controller IC

The output voltage and current of this circuit are determined by the specific values chosen for the capacitor and inductor. In this setup, the circuit is configured for a 5V output. For detailed guidance on utilizing this IC effectively, comprehensive instructions are available in the VIPER12A Application Notes.

Primarily designed as a buck regulator, this IC is optimized for 5V or 12V output voltages, catering to a maximum output current of 200mA. Notably, a crucial aspect of this IC is its operating voltage, Vdd, derived from the regulated voltage side. To initiate regulation, an initial voltage is necessary, typically supplied by a capacitor.

Application of VIPER12A 

The VIPER12A is a versatile offline converter IC used in various low-power applications that require high efficiency and a compact design. Some of its common applications include:

• SMPS (Switched-Mode Power Supplies): It's often used in flyback or buck-boost converter topologies for AC/DC power conversion in applications such as adapters, chargers, and small power supplies.
• LED Lighting: Due to its high efficiency and ability to handle various input voltage ranges, the VIPER12A can be utilized in LED drivers for lighting applications, providing stable and efficient power.
• Home Appliances: It's employed in low-power appliances like standby power supplies, auxiliary power supplies in TVs, set-top boxes, and other household electronics.
• Industrial Power Supplies: In industrial settings, the VIPER12A finds use in various control circuits, auxiliary power supplies, and low-power converters for sensors and controls.
• Consumer Electronics: It's suitable for low-power electronics such as IoT devices, smart home applications, and portable devices where compact size and energy efficiency are crucial.
• Battery Chargers: In low-power charging applications, particularly for small batteries like those found in IoT devices, the VIPER12A can regulate the charging current and voltage efficiently.

VIPER12A Equivalent IC

VIPER22A vs VIPER12A: What are Differences

The VIPER12A and VIPER22A are both SMPS (Switched-Mode Power Supply) controller ICs designed by STMicroelectronics, but they have some differences in their specifications and intended applications:

VIPER12A Datasheet PDF

Check and Download VIPER12A datasheet pdf here>>

Manufacturer

The VIPER12A IC is manufactured by STMicroelectronics, a multinational semiconductor company headquartered in Geneva, Switzerland. STMicroelectronics is well-known for producing a wide range of semiconductor products including microcontrollers, power management ICs, sensors, and other integrated circuits used across various industries like automotive, industrial, consumer electronics, and more.