LTC4238
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LTC4238

High Voltage High Current Hot Swap Controller

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LTspice LTC4238 - Hot Swap Controllers Download 4.87 KB
Features
  • Allows Safe Board Insertion into Live Backplane
  • Wide Operating Voltage Range: 6.5V to 80V
  • Drives Two Gates for High Power Applications
  • Configurable Parallel, Staged Start or Single MOSFET Modes
  • Adjustable Precision Current Limit: 6mV to 20mV
  • Current Foldback Limits MOSFET Power
  • SOA Timer Optimizes MOSFET Capability
  • Monitors VGS and VDS for MOSFET Health
  • 12V Gate Drive for Lower MOSFET RDS(ON)
  • Parallelable Controllers for Very High Current Levels
  • Available in 24-Lead Narrow SSOP and 24-Pin 4mm × 5mm QFN Packages
Additional Details
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The LTC4238 is a high voltage high current Hot Swap controller that allows a board to be safely inserted and removed from a live backplane. Dual 12V gate drive is well suited for high power applications to either share safe operating area across parallel MOSFETs or support a 2-stage start-up that first charges the load capacitance followed by enabling a low on-resistance path to the load.

The device features active current limiting (ACL) with two foldback options as VDS increases. The constant power profile limits the power dissipation to be no higher than a fixed value, while the high power profile allows the part to ride through large input steps during operation.

The LTC4238 notifies when output power is good. In addition, it has protection features that respond to input undervoltage, overvoltage; and generate a fault when there is an overcurrent or FET bad condition.

Applications

  • Live Board Insertion in 12V, 24V and 48V Systems
  • Industrial High Side Switch/Circuit Breaker
  • Computers, Servers
  • Vehicle Electrical Systems
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LTC4238

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Data Sheet

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UPDATED 07/30/2020
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LTC4238: High Voltage High Current Hot Swap Controller Data Sheet (Rev.0)

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UPDATED 07/30/2020
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LTC4238: 高電圧高電流ホット・スワップ・コントローラ データシート

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User Guide

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UPDATED 07/30/2020
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DC2914A - Demo Manual (Rev.0) redirect icon

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Documentation

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High Power Hot Swap Controllers
Hot Swap Controllers

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2020-12-18

01:01

LTC4238: High Voltage High Current Hot Swap Controller

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Software & Part Ecosystem

Evaluation Kits 1

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DC2914A

LTC4238 High Power Hot Swap Controller

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DC2914A

LTC4238 High Power Hot Swap Controller

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DC2914A
LTC4238 High Power Hot Swap Controller
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Product Detail

DC2914A showcases the LTC4238, high power, Hot Swap controller. LTC4238 is suited for 12V, 24V and 48V systems and comes loaded with advanced features including SOA timer, COMM pin for scalability, and various operating modes. The board has three variants to showcase the three different staged start topologies of LTC4238. The DC2914A-A showcases the parallel mode of operation for a 48V, 1.5kW application. The DC2914A-B demonstrates the low stress staged start mode for a 48V, 2.5 kW regulated input application. The DC2914A-C showcases the high stress staged start mode with SOA timer for 48V, 2.5kW application with large input steps. Onboard LEDs indicate the presence of input, output as well as power good signaling and any fault if present. High voltage layout rules are followed for best long-term product reliability.

Resources

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DC2914A - Schematic Download

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DC2914A - Design Files Download

2.55 M

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DC2914A - Demo Manual (Rev.0) Download

428.82 K

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Evaluation Kits1

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DC2914A

LTC4238 High Power Hot Swap Controller

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LTC4238 - Hot Swap Controllers Download

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