TPS2491DGSR

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PMIC - Hot Swap Controllers have the ability to monitor and regulate system power supplies. These power management integrated circuits (PMICs) can help system operators manage their systems and protect hardware components by safely bringing them online, controlling their supply voltage and detecting any residual current problems. The Texas Instruments TPS2491DGSR is one of the many hot swap controllers available in the market, designed to help with the safe power-on of integrated circuits connected below a system voltage supply.

The TPS2491DGSR is a high side power MOSFET switch with a current limit. It includes a gate driver and a comparator for over voltage and over current fault detection. This dual-channel power switch was specifically developed for applications which require the safe power-on of integrated circuits below a system voltage supply. With its 5A capacity, it can help provide power to high current applications such as DDR3/4 DIMM, I2C, and Super I/O chips.

The working principle of the TPS2491DGSR is based on the control of the overcurrent and overvoltage events. When power is applied at the input, the device’s integrated gate driver switches on a 5A capable N-channel MOSFET automatically. In addition, the device has integrated short-circuit fault detection circuit, a second-level current detection circuit, and an input under-voltage lock-out (UVLO) circuit to prevent over or under voltage events in the input.

The low on-resistance and current limit of the TPS2491DGSR provides system designers the flexibility of implementing safety features for the power delivery path in their designs. It has a selectable power-on delay feature to reduce the power-up current surge and reduce the peak power demand. The thermal shutdown protection circuit in the device helps protect it from overheating, by disabling the MOSFET in the event of an over-temperature events.

The TPS2491DGSR is suitable for applications such as mainboard VRM supplies and server power-on applications that require overvolage, overcurrent, and short-circuit protection. Its on-resistance and power-on delay feature help to minimize power on-events spikes. With its thermal shutdown protection and adjustable current limits, it helps protect the system and integrated circuits from power-induced damage.

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