LTC4284
Info : RECOMMENDED FOR NEW DESIGNS
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LTC4284

High Power Negative Voltage Hot Swap Controller with Energy Monitor

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 6
1ku List Price Starting From $7.44
Features
  • 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
Additional Details
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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
Part Models 6
1ku List Price Starting From $7.44

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Mar 15, 2021

- 21_0073

LTC4284 Datasheet Limit Change

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- 21_0073

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LTC4284 Datasheet Limit Change

LTC4284CUHG#PBF

PRODUCTION

LTC4284CUHG#TRPBF

PRODUCTION

LTC4284HUHG#PBF

PRODUCTION

LTC4284HUHG#TRPBF

PRODUCTION

LTC4284IUHG#PBF

PRODUCTION

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PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC2909A

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

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DC2909A

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

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

Product Detail

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.

reference details image

DC2470A

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

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DC2470A

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

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

Product Detail

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.

Tools & Simulations

Tools & Simulations 2

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.

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