LTC4236CUFD-2#PBF

PMIC - Hot Swap Controllers

The LTC4236CUFD-2#PBF is a type of Hot-Swap controller IC designed to help ensure safe power up, connection and disconnection of high wattage transceivers and bus systems. It features a built-in protection overheat shut-off and high current hard limiting capabilities. The IC uses the existing power supplies of the system for its power. It’s a small package non-isolation device, ideal for many hot swap graphics cards, optical backplanes, and telecommunication devices.

Features

• Input voltage range: 4.5V to 80V
• Output voltage range: 4.5V to 80V
• Output current: 8A (typical)
• High voltage and temperature operating range: - 55C to +150C
• Overtemperature & overcurrent protection with latched shutdown
• Undervoltage & overvoltage protections
• High current limit accuracy
• Small and low profile

Application Field and Working Principle

The LTC4236CUFD-2#PBF is suitable for applications that require fast and reliable hot swap solutions such as, advanced graphics cards, optical backplanes, sensory system, powered IEEE 1394b buses, power over ethernet systems, central office and telecommunication devices, and other point-to-point communication systems. The Hot-Swap controller IC is ideal for use in distributed power architectures and lighting systems.

The IC can detect over temperature or over current conditions, disabling the power and allowing the IC to cool down. This process will help manage and prevent catastrophic thermal runaway problems. This safety feature helps prevent catastrophic damage by disabling the power lines when an overcurrent or overtemperature condition is detected. The work of the Hot-Swap controller is to allow the user to connect and disconnect safely and reliably power to the system while maintaining the voltage in the early stages of power up.

The LTC4236CUFD-2#PBF is a high-performance, single-channel Hot-Swap controller IC with a low-side MOSFET switch. It features a high current limit setting accuracy, and it can handle up to 8A at full temperature operation. The device is also capable of operating in a very wide temperature range from -55C to +150C. It offers a low-frequency kick-start as well as a thermal limiting feature which can protect against catastrophic thermal runaway.

The device can be used in many applications that require fast and reliable power up, connection, and disconnection. The LTC4236CUFD-2#PBF works by providing a low-side MOSFET switch which is activated only when an in-rush current is detected. This is done by momentarily disabling the power to the startup sequence, allowing the user to monitor the voltage level and current before the MOSFET switch is activated. This in-rush current protects against lightning and other fast transient events, while minimizing power ripple impacts.

Since the device is a non-isolation device, it is not affected by the power source of the system. This makes it ideal for use in distributed power architectures, lighting systems, optical backplanes, and telecommunication devices, as well as powered IEEE 1394b buses and power over Ethernet systems.

In conclusion, the LTC4236CUFD-2#PBF is a Hot-Swap controller IC designed to help ensure safe power up, connect and disconnect of high wattage transceivers and bus systems. The IC features an inrush current limiting and high current hard limiting capabilities, and it is reliable for use in a wide range of applications. It is a small package non-isolation device and provides an excellent way to ensure safe and reliable power up, connect and disconnect in applications such as advanced graphics cards, optical backplanes, and telecommunication devices.