LTM9100

PRODUCTION

Anyside High Voltage Isolated Switch Controller with I2C Command and Telemetry

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Overview

  • CSA (IEC/UL) Approved, File #255632
  • Reinforced Insulation
  • Integrated Isolated Power Supply
  • Adjustable Turn-On Ramp Rate and Current Limit
  • I2C/SMBus Interface
  • 10-Bit ADC Monitors Current and Two Uncommitted Channels
  • High Common Mode Transient Immunity: ≥ 30kV/μs
  • Fault Status Alert and Power Good Outputs
  • Independent 3V to 5.5V Logic Supply
  • ±20kV ESD Across the Isolation Barrier
  • Maximum Continuous Working Voltage: 690VRMS
  • 14.6mm Creepage Distance
  • Low Current Shutdown Mode (<10μA)
  • 22mm × 9mm × 5.16mm BGA Package

The LTM9100 μModule® (micromodule) controller is a complete, galvanically isolated switch controller with I2C interface, for use as a load switch or hot swap controller. The load is soft started and controlled by an external N-channel MOSFET switch. Overcurrent protection minimizes MOSFET stress during start-up, input step and output short-circuit conditions. Owing to the isolated, floating character of the switch, it is easily configured for use in high side, low side and floating applications.

A single 5V supply powers both sides of the switch controller through an integrated, isolated DC/DC converter. A separate logic supply input allows easy interfacing with logic levels from 3V to 5.5V, independent of the main supply. Isolated measurements of load current and two additional voltage inputs are made by a 10-bit ADC, and accessed via the I2C interface.

The logic and I2C interface is separated from the switch controller by a 5kVRMS isolation barrier, making the LTM9100 ideal for systems where the switch operates on buses up to 1000VDC, as well as for providing galvanic isolation in systems where a ground path is broken to allow large common mode voltage swings. Uninterrupted communication is guaranteed for common mode transients of up to 30kV/μs.

APPLICATIONS

  • High Voltage DC Hot Swap
  • Live Backplane Insertion
  • Isolated Distributed Power Systems
  • Power Monitors
  • Industrial Control Systems
  • Breaking Ground Loops

LTM9100
Anyside High Voltage Isolated Switch Controller with I2C Command and Telemetry
LTM9100 Application Circuit LTM9100 Performance Graph LTM9100 Pin Configuration
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Documentation

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Protection Switches & Controllers 3
LTC4260 RECOMMENDED FOR NEW DESIGNS Positive High Voltage Hot Swap Controller with I2C Compatible Monitoring
LTC4261 PRODUCTION Negative Voltage Hot Swap Controllers with ADC and I²C Monitoring
LTC4366 RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper
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Tools & Simulations

LTspice


Models for the following parts are available in LTspice:

  • LTM9100

Linduino 3

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.


Evaluation Kits

eval board
DC2423A-A

LTM9100 Demo Board | Isolated 48V Switch Controller with Telemetry [requires DC590 or DC2026]

Product Details

Demonstration circuit 2423A showcases the LTM9100 Isolated Switch Controller in either a typical 48V application (–A) or in a high voltage 380V application (–B). The board may be configured for either high side or low side operation, dependent on the connection of external supply and load to the banana jacks. An on board capacitive load may also be wired into the circuit. LEDs indicate the presence of input and output voltage.


 


eval board
DC2423A-B

LTM9100 Demo Board | Isolated 380V Switch Controller with Telemetry [requires DC590 or DC2026]

Product Details

Demonstration circuit 2423A showcases the LTM9100 Isolated Switch Controller in either a typical 48V application (–A) or in a high voltage 380V application (–B). The board may be configured for either high side or low side operation, dependent on the connection of external supply and load to the banana jacks. An on board capacitive load may also be wired into the circuit. LEDs indicate the presence of input and output voltage.

DC2423A-A
LTM9100 Demo Board | Isolated 48V Switch Controller with Telemetry [requires DC590 or DC2026]
DC2423A - Schematic DC2423A-A - Demo Image
DC2423A-B
LTM9100 Demo Board | Isolated 380V Switch Controller with Telemetry [requires DC590 or DC2026]
DC2423A-B Demo Board DC2423A-B Demo Board DC2423A-B Demo Board DC2423A-B Demo Board DC2423A-B Demo Board DC2423A-A - Demo Image DC2423A - Schematic

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