NCP5422ADR2

The NCP5422ADR2 is a high efficiency, space-saving, DC-DC switching controller that works with low external components and is optimized for high frequency operation with switching frequencies of up to 500kHz.

The NCP5422ADR2 is designed to support both step-down and step-up applications, sync rectification, reduction / active clamp, flyback, totem-pole PFC, DVR and offline applications, and can be used for multiple topologies. It supports two different types of non-synchronous synchronous circuits, a frequency compensation circuit, a broad current range, an internal synchronous switch, overvoltage, overcurrent, over-temperature and short-circuit protection, as well as an adjustable soft start.

The NCP5422ADR2 is targeted for applications such as automotive, industrial, aviation and military, communications, computer and consumer electronics, battery management and AC / DC converters.

Operating Principle

The NCP5422ADR2 has an adjustable internal oscillator that has an adjustable frequency range (100kHz – 500kHz), a frequency compensation circuit, a Pulse Width Modulation (PWM) / Pulse Frequency Modulation (PFM) selector, and a Broad Current Range (BCR). It also has an internal synchronous switch and an adjustable soft start for maximum system flexibility.

It has an external synchronization pin, which allows the user to synchronize the FSW of the NCP5422ADR2 with the noise-sensitive components in the system. The controller also supports the use of a frequency sleep mode, which can be activated when the system is in its standby or idle state. With this feature, the system power consumption is significantly reduced.

The NCP5422ADR2 has overvoltage, overcurrent, overtemperature and output short-circuit protections designed for systems with low external components. An specially designed desaturation detection circuit provides a single-sequence protection. The switching frequency of the NCP5422ADR2 can be adjusted by an external resistive divider.

Applications

The NCP5422ADR2 is optimized for use in multiple topology applications such as flyback, forward, buck, boost, and buck-boost. It is used in automotive, industrial, and energy-/environmental applications, communication, computer and consumer electronics, as well as battery management and AC / DC converters. It is suitable for applications such as point-of-load converters, distributed power supplies, adapter conversions, server power supplies, embedded controllers and portable power supplies.

Several features of the NCP5422ADR2 contribute to its high efficiency in applications such as the output current supporting up to 8A with a minimum input voltage required of 4.5V, its wide adjustable frequency range (100kHz – 500kHz), its high temperature performance, and its low external component count.

The NCP5422ADR2 is a highly efficient, space-saving DC-DC switching controller designed for use in multiple topology applications such as flyback, forward, buck, boost, and buck-boost applications. The controller provides adjustable switching frequencies of up to 500kHz, overvoltage, overcurrent, overtemperature and output short-circuit protection, and a frequency sleep mode for low power consumption. It is suitable for a range of applications including automotive, industrial, and energy-/environmental applications, communication, computer and consumer electronics, as well as battery management and AC / DC converters.