KA5L0380RYDTU

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KA5L0380RYDTU is a type of PMIC (Power Management ICs) used in AC DC converters and offline switchers. It is built with a highly efficient, low-noise, buck modes synchronous rectification, and pulse frequency modulation (PFM) control PWM power stages to provide a stable and reliable output voltage. The KA5L0380RYDTU allows a single-stage AC/DC converter to directly drive a load, or act as part of a multi-stage converter whose output voltage is higher than the input voltage.

This IC is an ideal solution for applications that require a wide output voltage range and low current ripple. It has been designed for a wide range of input and output power scenarios and is capable of delivering high output currents even at low input voltages. Its ultra-low output voltage ripple allows it to be used in digital power supplies, such as for supercapacitor or lithium-ion battery charger, printers, and notebook computers.

The KA5L0380RYDTU is designed to pre-regulate the output voltage within a wide range from 3.3V to 24V with programmable over-voltage protection (OVP). It offers high efficiency of more than 90%, high power factor of more than 0.98, and low EMI noise compared with other conventional topologies. It features over-voltage protection (OVP) protection, short-circuit protection (SCP) protection, and open-loop protection (OLP) protection.

The IC is built with an external controller and a MOSFET power stage. The external controller consists of two parts, a Pulse Width Modulation (PWM) controller and a Synchronous Rectification (SR) control logic. An external PWM signal is used to generate the required output voltage with the help of the external controller and the output voltage is monitored with a voltage feedback loop. The Synchronous Rectification (SR) control logic is used to control the power MOSFETs to reduce power losses, ripple noise, and EMI noise associated with switching operations in the converter.

The PFM/PWM modes of the KA5L0380RYDTU operate at different levels of efficiency and frequency depending on the load current. When the load current is low, the PFM mode is used to achieve a low operating frequency to reduce ripple currents and EMI noise. When the load current is high, the PWM mode is used to increase the switching frequency for better efficiency and higher utilization of the power stage.

The KA5L0380RYDTU can be used for applications that require high accuracy and fast transient response. It can also be used for a wide range of input and output power settings and for large-load applications. With its high efficiency, small size, and simple design, this PMIC is an ideal solution for high current, high voltage DC power applications.

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