LTC4355HMS#PBF

The LTC4355HMS#PBF is a power management IC (PMIC) or power OR controller with ideal diode that combines controller and ideal diode in one package. Its application field mainly includes industrial and factory automation, renewable energy systems and automotive power systems that require power flow control. It can also support solar panel system, battery health monitoring and other DC/DC converter systems. This article will give a brief overview of the working principle and applications of the LTC4355HMS#PBF controller.

Overview
The LTC4355HMS#PBF is an integrated circuit that combines a MOSFET-based power OR controller and an ideal diode in one package. It is used to control the flow of power from multiple power sources and prevents let-through voltage from a non-preferred source. Its integrated protection features and operating temperature range of -40ºC to +125ºC make it ideal for many industrial and factory automation, renewable energy and automotive systems.

Working Principle
The power OR controller of the LTC4355HMS#PBF links two power sources such as solar panel and battery. The ideal diode provides a power path when the controller is disabled and one of the power sources is at a higher voltage than the other. The power OR controller monitors and compares the voltages of both sources and selects the one with the higher voltage. When the controller is enabled, the gate drive of the internal MOSFET is turned on, providing a power path to the device or load while blocking the other power source.

The major components and functions of the LTC4355HMS#PBF are the power OR controller, the ideal diode, the gate drive, the input undervoltage (UV) lockout, the switch current limit, the remote-on/off control and the power good (PG) output. The power OR controller links two power sources and provides gate drive control to switch the power flow path. The ideal diode provides a low loss power path from the non-preferred power source. The gate drive provides the necessary drive signal to turn the internal MOSFET on or off. The input UV lockout feature prevents the device from operating when the power source is below a certain voltage. The switch current limit prevents the internal MOSFET from overheating. The remote-on/off control provides for manual or remote device enable or disable. The power good output provides an active-low signal when suffiicient supply voltage is available.

Application Area
The LTC4355HMS#PBF is suitable in applications such as industrial and factory automation, renewable energy systems and automotive power system. Its ability to handle high voltage and high current makes it ideal for industrial and factory automation systems. It can be used as a smart switch in solar panel system applications to monitor and optimize power usage and ensure battery health monitoring. In automotive systems, it can provide a simple solution for voltage sensing and power flow control.

The LTC4355HMS#PBF is a power management IC (PMIC) or power OR controller with ideal diode that can be used in different types of applications such as industrial and factory automation, renewable energy systems and automotive power systems. It combines a controller and an ideal diode in one package and is able to handle high voltages and currents. Its integrated protection features and operating temperature range of -40ºC to +125ºC make it ideal for many applications.