LTC4284

High Power Negative Voltage Hot Swap Controller with Energy Monitor

Data Sheet

Rev. B

Recommended for New Designs

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Overview

Features and Benefits
Product Details

Features and Benefits

Drives Two Gates for High Power Applications
Configurable Parallel, Staged Start or Single Modes
Protects MOSFET with SOA Timer
Programmable 15mV to 30mV Current Limit Sense Voltage with <3.3% Accuracy and Adjustable Foldback
8-Bit to 16-Bit Gear-Shift ADC with 0.7% Accuracy
Monitors Voltages, Currents, Power and Energy
Nonvolatile Configuration and Fault Recording

Floating Topology for Rugged High Voltage Operation
Selectable Inrush Control: dV/dt or Current Limit
I²C/SMBus or Single-Wire Broadcast Interfaces
Min/Max ADC Measurement Logging with Alerts
Reboots on I²C Command with Programmable Delay
Adjustable Input UV/OV Thresholds and Hysteresis
44-Pin 5mm × 8mm QFN Package

Product Details

The LTC4284 negative voltage hot swap controller drives external N-channel MOSFETs to allow a board to be safely inserted and removed from a live backplane. The dual-gate, multi-mode drivers optimize the MOSFET safe operating area (SOA) for a variety of power levels. The SOA timer limits MOSFET temperature rise for reliable protection against overstresses.

An I²C interface and onboard gear-shift ADC allow monitoring of board current, voltage, power, energy, and fault status. An available single-wire broadcast mode simplifies the interface by eliminating two isolators. The included EEPROM provides black-box capturing and nonvolatile configuration of fault behavior.

Additional features respond to input UV/OV, interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a board, turn off the MOSFETs if an external supply monitor fails to indicate power good within a timeout period, and auto-reboot after a programmable delay following a host commanded turn-off.

APPLICATIONS

Telecom Infrastructure
–48V Distributed Power Systems
Servers and Data Centers
Power Monitors

Product Categories

Power Monitor, Control, and Protection
- High Voltage Hot Swap Controllers

Markets and Technologies

Data Center

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Product Lifecycle Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (2)

DC2909A

LTC4284 Demo Board | –48V, 1500W Hot Swap Controller with Telemetry and EEPROM

DC2470A

Demo Board for LTC4284 | High Power Negative Voltage Hot Swap Controller with I²C Energy Monitor and EEPROM

DC2909A

View Detailed Evaluation Kit Information

DC2909A showcases the LTC4284 high power, negative hot swap controller with telemetry and EEPROM in a –48V, 31A (1500W) application. DC2909A is configured for parallel mode, which offers reliable low cost hot plug solution for high power systems where input steps are imminent.

Included on board is isolation for power good control pins, to enable downstream power converters. LEDs indicate the presence of –48V input and output as well as the state of both supply feeds and power good signaling. High voltage layout rules are followed throughout for best long-term product reliability.

Headers are provided for three I²C interfaces, providing instant access to voltage, current, power, energy, fault log, and board temperature data.

Resources

DC2470A

View Detailed Evaluation Kit Information

Demonstration circuit 2470A showcases the LTC4284 high power, negative Hot Swap controller with I²C energy monitor and EEPROM in a 2.5kW, −48V application. DC2470A is configured for low stress staged start, which offers the lowest cost hot plug solution for high power systems.

Included on the board is isolation for power good control pins to enable downstream power converters. LEDs indicate the presence of −48V input and output as well as the state of both supply feeds and power good signaling. High voltage layout rules are followed throughout for best long term product reliability.

Headers are provided for all three LTC evaluation interfaces, providing instant access to voltage, current and power measurements, fault logging, and board temperature.

Resources

Documentation

Data Sheets (1)

PDF

3.31 M

LTC4284: High Power Negative Voltage Hot Swap Controller with Energy Monitor Data Sheet (Rev. B)

User Guides (1)

PDF

402.69 K

DC2470A Demo Manual (Rev. 0)

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice downloads and documentation

Models for the following parts are available in LTspice:

LTC4284

Design Tools

XLSM

283.13 K

LTC4283/LTC4284 Design Tool

Reference Materials

Product Selector Card (2)

High Power Hot Swap Controllers

Hot Swap Controllers

Press Releases (1)

SOA Sharing Hot Swap Controller Enables Telecom/Datacom Kilowatt Board Designs

Design Resources

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.