Analog Devices LTC4281 | Demoboard DC2278A

Description

Demonstration circuit 2278A features the LTC®4281 hotswap controller. The LTC4281 is well suited to high powerapplications because the precise monitoring capabilityand accurate current limiting reduces the extremes inwhich both loads and power supplies must safely operate.Non-volatile configuration allows for flexibility in theautonomous generation of alerts and response to faults.The LTC4281 provides a rich set of features to supporthot swap applications including:nn 12-/16-Bit ADC Monitors Current, Voltage, Powerand Energynn I2C/SMBus Interfacenn Non-Volatile Configuration and Logging Functionsnn Generates Alerts on ADC Measurements Outside LimitsL, LT, LTC, LTM, Linear Technology, LTpowerPlay and the Linear logo are registeredtrademarks and QuikEval is a trademark of Linear Technology Corporation. All other trademarksare the property of their respective owners.nn Software Adjustable Current Limit with Foldbacknn Three General Purpose Input/OutputsAvailable in a 28-pin 4mm × 5mm QFN package, theLTC4281 is showcased on DC2278A configured for a12V, 50A application. The DC2278A-B has an includedprogramming socket to allow programming an LTC4281for prototyping purposes prior to its permanent installationon a PCB. The DC2278A-A does not have this socket. Bychanging a few passive components, 2.9V to 30V applicationscan easily be evaluated

Features

• Order Custom Programmed Parts
• Allows Safe Board Insertion Into Live Backplane
• 12-/16-Bit ADC with ±0.7% Total Unadjusted Error
• Monitors Current, Voltage, Power and Energy
• Internal EEPROM for Nonvolatile Configuration
• Wide Operating Voltage Range: 2.9V to 33V
• I2C/SMBus Digital Interface (Coexists with PMBus Devices)
• 12V Gate Drive for Lower MOSFET RDS(ON)
• Programmable Current Limit with 2% Accuracy
• MOSFET Power Limiting with Current Foldback
• Continuously Monitors MOSFET Health
• Stores Minimum and Maximum Measurements
• Alerts When Alarm Thresholds Exceeded
• Reboots on I2C Command
• Input Overvoltage/Undervoltage Protection
• Three General Purpose Input/Outputs
• Internal ±5% or External Timebases
• 28-Pin 4mm × 5mm QFN Package

Typical applications

• Network Routers and Switches
• Enterprise Servers and Data Storage Systems
• Base Stations
• Platform Management

More information

• Datasheet
• IC product information