LT1641-2IS8#PBF

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LT1641-2IS8#PBF is one of a series of hot-swap controllers provided by Linear Technology Corporation (LTC). The controller drives two NFETs to control a power supply and it is used for hot-swapping applications such as powering on or off cards in a chassis on a live backplane.

The controller has the following key features:

• Integrated NFETs reduce power losses
• Automatically turns off NFETs if voltage drops below minimum threshold
• Separate voltage monitor input for quick disconnect products
• Controlled current slew rates prevent inrush current surges
• Soft-start feature reduces overload on power supplies
• Simple external circuit operation / set up

The LT1641-2IS8#PBF is a dual output hot-swap controller made up of two cores. The first core comprises two NFETs in series that control the supply voltage and the second core detects faults and also regulates the gate of the NFETs. The controller is designed to allow current to ramp up slowly when no external load is present, preventing inrush current surges. It also ensures that the connected load turns off in case of an over-current event.

The hot-swap controller has an adjustable current slew rate that can be set using external components. Similarly, the over-current trip threshold can be set using external components. The control core of the LT1641-2IS8#PBF has a separate voltage monitor input which can be used to detect when the voltage drops too low or high and then disable the NFETs.

The LT1641-2IS8#PBF hot-swap controller also provides over-voltage protection for systems powered by multiple power supplies. This is done by monitoring the output voltage at the PC board level and disabling the NFETs whenever the voltage exceeds the set threshold. Additionally, the controller also has an on-board soft-start feature which can be used to reduce the overload on the power supply.

The LT1641-2IS8#PBF hot-swap controller is an ideal solution for hot-swap applications that require a fast and reliable way of supplying power. Its efficient design and adjustable parameters make it suitable for many applications such as CPU cards, FPGAs, and ASICs. Its integrated NFETs reduce power losses during hot-swapping and its adjustable current slew rates and over-voltage protection features give it an edge over other hot-swap controllers.

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