General Description
The NCP81428 is a PMBus® enabled, 12 V, 50 A resettable in−line
fuse designed for comprehensive protection against over current
events, over voltage events, short circuit events, and excessive inrush
current. The NCP81428 consists of a 0.65 m NMOS FET, a high
performance Hot−Swap Controller, and a Non−Volatile Memory
(NVM) all co−packaged into a LQFN32 package. The NCP81428 can
be configured as a single−phase solution, or in multi−phase as a
Master or a Slave to support higher current applications.
Power Features
• Up to 80 A Peak Output Current, 50 A Continuous
• VIN Operating Range: 5 to 18 V
• Up to 30 V Standby (PowerFet Off) Operation
• 0.65 m Path Resistance
Control Features
• Enabled by Pin Assertion and/or Through PMBus
• Output Pulldown Selection Via PMBus
• External Soft−Start Programming
• Programmable VIN Under Voltage Warning and Overvoltage Fault
• Programmable OCP Levels and Timers
• Soft Start Current Balancing between Parallel Units
Other Features
• Co−packaged Power Switch, Hotswap Controller and NVM
• (TWI) Two Wire Interface between Master and Slave(s)
• PMBus 1.4 Compliant for Telemetry
• ±2% IMON Accuracy at 30 A and Higher
• 10−bit ADC for IOUT, VIN, IOUT_pk, VOUT, VTEMP
• Parallel Operation for High Current Applications
• Excellent Current Balancing in Parallel Operations
• Over−temperature Shutdown
• FAULT#_C & FAULT#_D Multi−purpose Pins
• Internal FET Health Diagnostics
• Soft−start Current Limiting For SOA Protection
• Excessive Soft−start Duration Protection
• Fault Event and Peak Current Recording
• Programmable Auto Retry/Latch off Options
• 5 mm x 5 mm LQFN32 Package
• Operating Temperature: −40°C to +125°C
Applications
• Servers
• Data Storage
• Base Stations
• Industrial Applications