VIPER20ADIP-E

Duty Cycle:	--
Base Part Number:	VIPER20
Mounting Type:	Through Hole
Supplier Device Package:	8-DIP
Package / Case:	8-DIP (0.300", 7.62mm)
Operating Temperature:	--
Control Features:	--
Fault Protection:	Current Limiting, Over Temperature
Power (Watts):	20W
Frequency - Switching:	Up to 200kHz
Series:	VIPER™
Voltage - Supply (Vcc/Vdd):	8 V ~ 15 V
Voltage - Start Up:	11V
Topology:	Flyback
Voltage - Breakdown:	700V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The VIPER20ADIP-E is a high performance, offline switched-mode power supply (SMPS) controller. It is a part of the VIPER family of voltage regulators and controllers, designed to operate a wide range of AC and DC converters in unregulated AC and DC switching-mode applications. The VIPER20ADIP-E is capable of providing up to 8A of continuous output current at a maximum output voltage of up to 50V. It features several features including an extremely fast PWM switching frequency of up to 500 KHz and a built-in temperature sensing for protection against over temperature conditions.

Application Field

The VIPER20ADIP-E is ideal for use in a wide range of uncontrolled AC and DC applications including small AC/DC digital and battery-powered applications, adjustable/variable DC/DC converters, as well as offline SMPS applications. It is suitable for use in many industries and applications including automotive, industrial controls, process controls, computer peripherals, and instrumentation. The full-featured VIPER20ADIP-E can also be used in LED lighting applications and is ideal for green energy-saving applications.

Working Principle

The VIPER20ADIP-E operates according to the fixed off-time control principle. This principle allows for fast start-up, tightly regulated switching frequency and leading-edge modulated control. Its on-time is fixed, so the controller can achieve high step-down ratios with low RMS current when used in buck regulators. The device features integrated diodes for reverse-current protection and for regulation of the on-time shaping and start-up time. The VIPER20ADIP-E has a low start-up voltage of less than 1.5V and offers excellent line/load regulation. The device contains an on/off pin to provide an additional control option that can be used in applications such as battery chargers or auxiliary power supplies. The VIPER20ADIP-E also features integrated circuit protection and fault detection. This includes under-voltage lockout, current limit, programmable auto-restart, enable pin, auto-restart enable/disable, and open-drain output enable. It also features over-current protection, overtemperature protection and shutdown of the switching converter to protect the system from over-temperature conditions. The device also has a low power standby mode and is rated for up to 8A of continuous output current, and up to 50V of output voltage.

Conclusion

The VIPER20ADIP-E is a high performance, offline SMPS controller for a wide range of AC and DC switch-mode applications. It has a fast PWM switching frequency of up to 500 KHz, a low start-up voltage of less than 1.5V, and offers excellent line/load regulation. The VIPER20ADIP-E is built with several protection and fault detection features, such as under-voltage lockout, current limit, programmable auto-restart, enable pin, auto-restart enable/disable, and open-drain output enable. It also features overtemperature protection and shutdown, low power standby mode and is rated for up to 8A of continuous output current and up to 50V of output voltage. The VIPER20ADIP-E is ideal for small AC/DC digital and battery-powered applications, adjustable/variable DC/DC converters, as well as offline SMPS applications.

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