The ADM1278-2ACPZ is a Hot Swap Controller and Energy Monitor with PMBus interface allows a circuit board to be removed from or inserted into a live backplane. It also features current, voltage, power and temperature readback via an integrated 12-bit analog-to-digital converter (ADC), accessed using a PMBus? interface. The load current is measured using an internal current sense amplifier that measures the voltage across a sense resistor in the power path via the HS+ and HS- pins. A default current limit of 20mV is set, but this limit can be adjusted, if required. It limits the current through the sense resistor by controlling the gate voltage of an external N-channel FET in the power path, via the GATE pin. The sense voltage and therefore the load current, is maintained below the preset maximum. It protects the external FET by limiting the time that the FET remains on while the current is at its maximum value.
- 320ns response time to short-circuit
- Shutdown on detection of FET health fault
- Constant power foldback for tighter FET SOA protection
- Programmable start-up current limit
- 1% Accurate UV, OV and PWRGD thresholds
- Reports power and energy consumption over time
- Peak detect registers for current, voltage and power
- PROCHOT power throttling capability
- PMBus fast mode compliant interface
通信与网络, 电源管理
