Application Bulletin: ADI Introduces the World?s Most Accurate Hot Swap Controller with PMBus Digital Power Monitoring
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THE ANALOG DEVICES APPLICATIONS BULLETIN Controller and Digital Power Monitor ADM1178: Hot Swap with l2C Digital ADM4073: High-Side, Voltage Output, POWER MONITORING ADI Introduces the World's Most Accurate Hot Swap Controller with PMBus Digital Power Monitoring The ADM1276 is a hot swap controller that allows a circuit board to be removed from or inserted into a live backplane. It can be used to protect systems from overcurrent and overvoltage faults acting as an electronic fuse (e-fuse). It also features current, voltage, power readback, and energy metering via an integrated 12-bit analog-to- digital converter (ADC), accessed using a PMBus™ interface.

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ADM1275/ADM1276: Hot Swap Controller and Digital Power Monitor with PMBus Interface RSENSE: Measure system current. Hot swap control and fault protection. Adjust current limit to allow for standard sense resistor value. Q1: Current through sense resistor limited by controlling gate of FET. Low insertion loss (5 mV to 25 mV). RSENSE 2V TO 20V UV/OV pins: FET gate pulled low if under-/overvoltage detected. 2.95V TO 20V SENSE+ UV ISET pin: Adjust current limit with ISET voltage. OV ISET SENSE– + – ADM1275/ADM1276 ×50 VCC VCAP Q1 IOUT + 1.0V – – 1.0V + REF SELECT 1.0V SS GATE DRIVE/ LOGIC TIMER...

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A PMBus interface allows a controller to read current, voltage (ADM1275/ADM1276), and power (ADM1276 only) from the ADC. The VIN input voltage and l0UT current measurement values are multiplied by the ADM1276 to give the input power value. There is also an energy accumulator register—each time a power calculation is done, the power value is added to the energy accumulator register. This allows for the calculation of average power, as well as instantaneous power measurements. Evaluation kits available. VOLTAGE ^ CURRENT^ VOLTAGE VOLTAGE ^ CURRENT^ POWER ^ ENERGY^ VOLTAGE Hot Swap and E-Fuse...

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ADM4210: Positive Hot Swap Controller The ADM4210 is a positive, high-side hot swap controller that safely enables a printed circuit board to be removed from and inserted into a live backplane. An external N-channel power MOSFET and a sense resistor are required. An internal charge pump is used to enhance the gate of an • Controls supply rails from 2.7 V to 16.5 V • 50 mV sense voltage limit providing minimal voltage drop losses • Charge pumped gate drive for N-channel FET • Automatic retry (ADM4210-1) or latch-off (ADM4210-2) ADM1170/ADM1171/ADM1172: Positive Hot Swap Controllers The...

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ADM1175/ADM1176/ADM1177/ADM1178: Hot Swap with PC Digital Power Monitoring The ADM1175/ADM1176/ADM1177/ADM1178 are a series of integrated hot swap controllers and current-sense amplifiers that offer digital current and voltage monitoring via an on-chip 12-bit analog-to-digital converter (ADC), communicated through an PC interface. Controls supply voltages from 3.15 V to 16.5 V ±3% accurate hot swap current limit level 12-bit ADC for current and voltage readback Charge pumped gate drive for N-channel FET Adjustable current limit with circuit breaker Automatic retry (-1 model) or latch-off...

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ADM1191/ADM1192: Digital Power Monitors with l2C Interface The ADM1191 and ADM1192 are integrated current-sense amplifiers that offer digital current and voltage monitoring via an on-chip 12-bit analog-to-digital converter (ADC), communicated through an l2C interface. 12-bit ADC for current and voltage readback ALERTB output for overcurrent interrupts PC fast mode-compliant interface ADM4073: High-Side, Voltage Output, Current-Sense Amplifier The ADM4073 is a low cost, high-side, current-sense amplifier ideal for small portable applications. The device is available in three different gain...

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ADM1073: Full Feature –48 V Hot Swap Controller The ADM1073 is a negative voltage hot swap controller that allows a board to be safely inserted into and removed from a live –48 V backplane. This device performs the same basic function as the ADM1070 but with the addition of new features providing a more robust and powerful solution. A built-in soft start function allows control of the inrush current profile with an external capacitor on the soft start pin. The drain of the FET is also monitored to better ensure the FET’s SOA is not exceeded during linear regulation of the FET. Separate UV...

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Low Voltage Positive Hot Swap Controllers with Digital Power Monitor four addresses four addresses four addresses PMBus interface with four addresses PMBus interface with four addresses; also power readback Additional Features Soft start Soft start, foldback, fast gate shutdown, adjustable current sense limit Soft start, foldback, fast gate shutdown, adjustable current sense limit Low Voltage Positive Hot Swap Controllers Detection/Overvoltage Additional Features Soft start, separate Soft start, current-sense Power fail detector Part Number J'°"a^„ Detection/Overvoltage "'il''3'.!' ^ '...

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