LT8672
Info : RECOMMENDED FOR NEW DESIGNS
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LT8672

Active Rectifier Controller with Reverse Protection

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 30
1ku List Price Starting From $1.65
Features
  • AEC-Q100 Qualified for Automotive Applications
  • Reverse Input Protection to –40V
  • Improved Performance Compared to a Schottky Diode
    • Reduce Power Dissipation by >90%
    • Reduce Drop to 20mV
  • Ultrafast Transient Response
    • Rectifies 6VP-P Up to 50kHz
    • Rectifies 2VP-P Up to 100kHz
  • Wide Operating Voltage Range: 3V to 42V
  • Low 20µA Quiescent Current in Operation
  • Low 3.5µA Shutdown Current
  • Accurate 1.21V Enable Pin Threshold
  • Small 10-Lead MSOP Package, 10-Lead 3mm × 2mm DFN Package and 3mm × 2mm Side-Wettable DFN Package
Additional Details
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The LT8672 is an active rectifier controller for reverse input protection. It drives an external N-channel MOSFET to replace a power Schottky diode. Its very low quiescent current and fast transient response meet the tough requirements in automotive applications where AC input signals of up to 100kHz are present. These signals are rectified with minimum power dissipation on the external FET, simplifying thermal management on the PCB.

With a drop of only 20mV, the LT8672 solution eases the minimum input voltage requirement during cold crank and start-stop, allowing simpler and more efficient circuits. If the input power source fails or is shorted, a fast turn-off minimizes reverse current transients. An available shutdown mode reduces the quiescent current to 3.5μA.

An integrated auxiliary boost regulator provides the required boost voltage to turn the external FET fully on. A power good pin signals when the external FET is ready to take load current.

Applications

  • Automotive Battery Protection
  • Industrial Supplies
  • Portable Instrumentation
Part Models 30
1ku List Price Starting From $1.65

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Documentation

Documentation

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

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Feb 4, 2020

- 20_0130

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Apr 18, 2022

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Oct 11, 2022

- 22_0244

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package

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Apr 18, 2022

- 22_0050

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

LT8672EMS#WPBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2548A

LT8672EMS Demo Board | VIN = –15V to 35V, Up to 5A Output

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DC2548A

LT8672EMS Demo Board | VIN = –15V to 35V, Up to 5A Output

LT8672EMS Demo Board | VIN = –15V to 35V, Up to 5A Output

Product Detail

Demonstration circuit 2548A is an active rectifier with reverse protection featuring the LT8672. The demo board is designed for 5A load current. The input voltage range of the LT8672 is –40V to +42V. Two clamping diodes, D1 and D2, are used on the board to protect the IC from overvoltage spikes at the input, thus limiting the application’s DC input voltage range to –15V and +35V.

Tools & Simulations

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.

Reference Designs

Reference Designs 1

Knightrider Zynq Ultrascale +MPSOC Automotive Power Delivery Board​ - Top View

Automotive ASIL-D Compliant Power Delivery Board

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knightrider-zynq-ultrascale

Automotive ASIL-D Compliant Power Delivery Board

knightrider-zynq-ultrascale

Circuits from the lab

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Automotive ASIL-D Compliant Power Delivery Board

Features and Benefits

Xilinx Zynq® UltraScale+™ devices are the industry’s only cost-optimized FPGAs based on an advanced, production-proven 16nm architecture for best-in-class performance/watt.

Analog Devices, Inc. supports ASIL-D compliant automotive power delivery solutions for the Xilinx Zynq UltraScale+ MPSOC. The Knightrider board demonstrates the best-in-class power management supporting ASIL-D compliant solutions for functional safety.

Monolithic solutions are used to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated discrete solutions optimized for cost, efficiency and foot print.

ADI provides supporting documentation including power schematics, layout, LTpowerPlanner® and applicable LTpowerPlay® configuration files to enable you to validate the power solution for your application seamlessly.

For a complete list power designs and use cases, please contact your local FAE.

Key Power for full management devices are used as follows:

  • LT8672
  • LTC4365
  • MAX20410
  • MAX20478
  • MAX20438
  • LTC3307
  • MAX25229
  • MAX17510
View Detailed Reference Design external link

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