5L0380R Power Switch IC – KA5L0380R SMPS Controller (TO-220F-4L)

Overview

The 5L0380R is an integrated Pulse Width Modulator (PWM) and SenseFET specifically designed for high-performance offline Switched-Mode Power Supplies (SMPS) with minimal external components. This IC is a “powerhouse” that combines a high-voltage power MOSFET with a control chip in a single 4-pin package. It is widely used in the Pakistani repair market to fix “dead” power supply boards in electronics.

Key Features

• All-in-One Design: Combines a rugged 800V SenseFET with a PWM controller to simplify circuit design.

• Low Startup Current: Minimizes power loss during the initial power-on phase.

• Precision Protection: Includes pulse-by-pulse current limiting, overload protection (OLP), and over-voltage protection (OVP).

• Thermal Shutdown: Built-in internal thermal sensing to prevent the IC from burning out under extreme heat.

• Auto-Restart Mode: The IC automatically tries to resume operation once a fault condition (like a short circuit) is cleared.

Technical Specifications

Common Applications

• Satellite Receivers: The most common IC found in receiver power boards.

• DVD/Blu-ray Players: Used in internal AC-DC converters.

• LED TV Power Boards: Often used in the standby power section.

• Industrial Adapters: Reliable for 12V and 24V power brick repairs.