VIPER28HN: The 28V Step-Down Converter Redefining Power Conversion

Abstract

The VIPER28HN is a highly efficient, 28V step-down converter designed to meet the demands of modern power systems. With its advanced features and exceptional performance, the VIPER28HN is the ideal solution for a wide range of applications, including:

• Power supply designs
• Motor control systems
• Battery charging systems
• LED lighting systems

Table of Contents

1. Introduction
2. Features and Benefits
3. Technical Specifications
4. Design Considerations
5. Applications
6. Tips and Tricks
7. Conclusion

Introduction

The VIPER28HN is a high-performance step-down converter designed to operate from a wide input voltage range of 4.5V to 28V. This makes it suitable for use in a variety of applications, from low-power systems to high-power industrial systems. The VIPER28HN is also highly efficient, with a typical efficiency of over 90%. This makes it an ideal choice for applications where power consumption is a concern.

Features and Benefits

The VIPER28HN offers a number of features and benefits that make it an ideal choice for a wide range of applications. These features include:

• Wide input voltage range (4.5V to 28V): This makes the VIPER28HN suitable for use in a variety of applications, from low-power systems to high-power industrial systems.
• High efficiency (typically over 90%): This makes the VIPER28HN an ideal choice for applications where power consumption is a concern.
• Small size and low profile: This makes the VIPER28HN ideal for use in space-constrained applications.
• Low EMI: This makes the VIPER28HN suitable for use in applications where EMI is a concern.
• Built-in protection features: These features help to protect the VIPER28HN from damage due to overvoltage, overcurrent, and short circuits.

Technical Specifications

The following table shows the technical specifications of the VIPER28HN:

Design Considerations

When designing a power supply using the VIPER28HN, there are a few key design considerations that must be taken into account. These considerations include:

• Input voltage range: The input voltage range of the VIPER28HN is 4.5V to 28V. However, the maximum output voltage is limited to 28V. Therefore, when selecting the input voltage range, it is important to consider the maximum output voltage that is required.
• Output current: The output current of the VIPER28HN is 3A. However, the maximum output current may be limited by the input voltage range and the switching frequency. Therefore, when selecting the output current, it is important to consider these factors.
• Switching frequency: The switching frequency of the VIPER28HN can be set from 100kHz to 2MHz. However, the switching frequency must be selected carefully to ensure that the VIPER28HN operates within its safe operating area.
• Layout: The layout of the power supply is important to ensure that the VIPER28HN operates properly. The layout should be designed to minimize EMI and to ensure that the VIPER28HN is properly cooled.

Applications

The VIPER28HN is suitable for use in a wide range of applications, including:

• Power supply designs: The VIPER28HN can be used to design a variety of power supplies, including AC-DC power supplies, DC-DC power supplies, and LED power supplies.
• Motor control systems: The VIPER28HN can be used to design a variety of motor control systems, including brushed DC motors, brushless DC motors, and stepper motors.
• Battery charging systems: The VIPER28HN can be used to design a variety of battery charging systems, including lead-acid battery chargers, lithium-ion battery chargers, and nickel-cadmium battery chargers.
• LED lighting systems: The VIPER28HN can be used to design a variety of LED lighting systems, including LED street lights, LED floodlights, and LED spotlights.

Tips and Tricks

Here are a few tips and tricks for using the VIPER28HN:

• Use a heatsink: The VIPER28HN can dissipate a significant amount of heat, so it is important to use a heatsink to keep the device cool.
• Use a snubber circuit: A snubber circuit can help to reduce EMI and to protect the VIPER28HN from damage due to overvoltage spikes.
• Use a ferrite bead: A ferrite bead can help to reduce EMI and to improve the stability of the VIPER28HN.
• Use a proper layout: The layout of the power supply is important to ensure that the VIPER28HN operates properly. The layout should be designed to minimize EMI and to ensure that the VIPER28HN is properly cooled.

Conclusion

The VIPER28HN is a highly efficient, 28V step-down converter designed to meet the demands of modern power systems. With its advanced features and exceptional performance, the VIPER28HN is the ideal solution for a wide range of applications, including power supply designs, motor control systems, battery charging systems, and LED lighting systems.

Additional Information

For more information on the VIPER28HN, please visit the following website:

www.st.com/viper28hn

FAQs

Q: What is the maximum output current of the VIPER28HN?
A: The maximum output current of the VIPER28HN is 3A.

Q: What is the efficiency of the VIPER28HN?
A: The efficiency of the VIPER28HN is typically over 90%.

Q: What is the switching frequency of the VIPER28HN?
A: The switching frequency of the VIPER28HN can be set from 100kHz to 2MHz.

Q: What is the package of the VIPER28HN?
A: The VIPER28HN is available in a DIP-8 and SO-8 package.