Protection Circuitry/Hot Swap power management

Protection circuitry is a critical -- often overlooked -- segment of power supply design. Luckily, TI has you covered!

Any time your system needs to provide DC power from board to board, across a cable or backplane, or just turn on or off a subsystem while the primary system is running, possibly dangerous current and voltage spikes need to be considered. Also, systems with multiple supplies must often prevent reverse current flow in each input path. Providing a pass element (like a MOSFET) and control circuitry are critical to control the initial current inrush to your capacitors or control which input source is active, while additional features may be required to prevent overcurrent events or obtain safety approvals. TI's portfolio of integrated FET circuit protection devices, or external FET controllers, provide a range of solutions, no matter what your design may be!

TPS2420/1 Hot Swap Manager

• Input Voltage Range from 3V to 20V
• Capable of continuous current from 1A to 5A
• Latch off or Retry capable in case of fault
• Separate Fault and Maximum Current Thresholds (TPS2420 only)
• Small 4x4mm QFN package (TPS2420) or 8 pin SOIC (TPS2421-x)
• Analog current-monitor output (TPS2420 only)

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UCC3918 Current Manager

• Input voltage range 3V to 6V
• Programmable turn-on delay
• 16 pin SOIC package
• Reverse current-blocking
• Current limit adjustable from 0A to 4A
• Internal 75mΩ pass FET and sense elements
• Retry on fault
• Power good flag

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TPS2552/3 Current-limiting Switches

• Adjustable current limit from 75mA to 1.3A
• Current-limit accuracy of up to 6% at 1.3A
• Input voltage range 2.5V-6.5V
• Internal FET (100mΩ) and sense element

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TPS2294x Current-limiting Switches

• Fixed-current limit options up to 200ma
• Integrated LDO available
• Input voltage range 1.62V-5.5V
• Tiny 6-pin SC-70 packages

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12V Dual TPS2358/9 and Single TPS2458/9 Hot Swap Managers

• 12V nominal (9V to 15V)
• Single and dual versions
• 36/48-pin POFN packages
• Digital I²C or external component configurable
• External pass FET and sense resistor
• Analog current monitoring
• Integrated blocking FET controller (not required)
• Low-current 3.3V rail supported

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TPS2490/1 Mid & High Voltage Hot Swap Controller

• 9V to 80V operational
• Current-limiting and circuit breaking
• 10-pin MSOP package
• External pass FET and sense resistor
• Retry and latch-off versions
• Power limiting FET protection

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TPS2330/1

• Capable of driving a single N-channel MOSFET
• Input voltage range from 3V to 13V
• Programmable Overcurrent Threshold and Fault Timer
• Low 5uA Standby Supply Current
• Output dV/dt control limits inrush current

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• TPS2490, Reverse Input Voltage Block 23 Jun 2009
• Undervoltage and Overvoltage Control for the TPS2490/91 (Rev. A) 07 Oct 2008
• TPS2350, A High-Negative Voltage ORing Controller 08 May 2008
• A Robust Solution for 100-Amp Hot Swap of 12-Volt Supply Rails 21 Apr 2008
• TPS2350 With High-Side Switch 17 Apr 2008
• -48 V ATCA Module Hot Swap Using the TPS2393 (Rev. A) 12 Apr 2007
• Minimizing Light Load Oscillations with ORing Controllers 23 Jun 2009
• High Voltage ORing with Low Voltage Controllers 30 Sep 2008