LM25066A 具有 PMBus 的系统电源管理和保护 IC

描述The LM25066A combines a high performance hot-swap controller with a PMBus™ compliant SMBus/I2C interface toaccurately measure, protect and control the electrical operating conditions of computing and storage bladesconnected to a backplane power bus. The LM25066A continuously supplies real-time power, voltage, current, temperature andfault data to the system management host via the SMBus interface.The LM25066A control block includes a unique hot-swap architecture that provides current and power limiting to protectsensitive circuitry during insertion of boards into a live system backplane, or any other "hot" power source. A fast actingcircuit breaker prevents damage in the event of a short circuit on the output.The input under-voltage and over-voltage levelsand hysteresis are configurable, as well as the insertion delay time and fault detection time.A temperature monitoring blockon the LM25066A interfaces with a low-cost external diode for monitoring the temperature of the external MOSFET or other thermally sensitive components.The POWER GOOD output provides a fast indicator when the input and/or output voltages areoutside their programmed range. LM25066A current measurement accuracy is ±1%over temperature.The LM25066A monitoring block computes both the real-time and average values of subsystem operating parameters (VIN, IIN, PIN, VOUT) as well as the peak power.Accurate power averaging is accomplishedby averaging the product of the input voltage and current.A black box (Telemetry/Fault Snapshot) function captures and stores telemetry data and device status in the eventof a warning or a fault.特性 Input voltage range: 2.9V to 17VI 2C/SMBus interface and PMBus compliant command structureProgrammable 25mV or 46mV current limit thresholdConfigurable circuit breaker protection for hard shortsConfigurable under-voltage and over-voltage lockouts with hysteresisRemote temperature sensing with programmable warning and shutdown thresholdsDetection and notification of damaged MOSFET conditionReal time monitoring of VIN, VOUT, IIN, PIN, VAUX with12-bit resolution and 1 kHz sampling rateCurrent measurement accuracy: ±1% over temperaturePower measurement accuracy: ±2% over temperatureTrue input power measurement using simultaneous sampling of VIN and IIN accurately averages dynamic power readingsAveraging of VIN, IIN, PIN, and VOUT over programmable interval ranging from 0.001 to 4 secondsProgrammable WARN and FAULT thresholds with^SMBA notificationBlack box capture of telemetry measurements and device status triggered by WARN or FAULT condition24-lead LLP package