VIPER28HDTR Integrated Circuits (ICs)

Duty Cycle:	80%
Base Part Number:	VIPER28
Mounting Type:	Surface Mount
Supplier Device Package:	16-SO
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	--
Fault Protection:	Current Limiting, Over Temperature, Over Voltage, Short Circuit
Power (Watts):	16W
Frequency - Switching:	115kHz
Series:	VIPer™ plus
Voltage - Supply (Vcc/Vdd):	8.5 V ~ 23.5 V
Voltage - Start Up:	14V
Topology:	Flyback
Voltage - Breakdown:	800V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The VIPER28HDTR is an AC DC converter, part of the VIPER family. It provides a reliable solution for offline power supply applications and delivers superior performance, cost savings and total owner value. The VIPER28HDTR supports two output configurations for a single current level: Single Input and Multiple Outputs.

Features

The VIPER28HDTR features fast shutdown and synchronization (±1% of total energy consumed during power-on) with required parameters working within the range of 350mA to 5A and -40°C to +100 °C temperature. Additionally, it has a minimum operating voltage of 12V and a maximum operating voltage of 24V. It also provides excellent output accuracy of ±40 mV and excellent thermal management due to a built-in thermal monitoring system. The VIPER28HDTR is a highly efficient AC DC converter with an efficiency of up to 95%. It is a compact solution with a maximum power of 28W and a footprint of only 9.5mm x 39.6mm x 6.1mm. It also offers a robust protection including short circuit and over-temperature protection for reliability and safety

Applications

The VIPER28HDTR is designed for use in a variety of offline applications. It can be used for UPS systems, industrial automation and EDP applications, distributed power systems, consumer electronics, home and office appliances, medical devices and more. The VIPER28HDTR is also suitable for applications with harsh environmental conditions due to its superior temperature operations and robust protection system.

Working Principle

The VIPER28HDTR is a non-isolated buck-boost converter. It allows direct AC input with input range of 90-265VAC. It is a synchronous rectification converter and can be configured to work in CV, CC and PFM mode. In PFM mode, system efficiency is improved due to lower operating frequencies and support for low power consumption is achieved through quick transient recovery. The VIPER28HDTR uses a DC/DC booster to convert AC input power to DC output power. It also employs an active clamp and a linear regulator to deliver high accuracy and low ripple performance. The VIPER28HDTR includes an adaptive on-time control, allowing optimal operation point adjustments.

Conclusion

The VIPER28HDTR is an AC DC switch mode power supply suitable for a wide range of offline applications. It provides high efficiency, low ripple performance, wide operating temperature range and robust protection. Its small size and ability to work in different modes makes it a great choice for low power applications.

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