LT8228
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LT8228

Bidirectional Synchronous 100V Buck/Boost Controller with Reverse Supply, Reverse Current and Fault Protection 

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LTspice LT8228 - Step-Down (Buck) Regulators Download 8.9 KB
Part Models 12
1ku List Price Starting From $7.77
Features
  • Bidirectional Voltage or Current Regulation
  • Bidirectional Reverse Current Protection
  • Input and Output Negative Voltage Protection to –40V
  • Bidirectional Inrush Current Limit and Boost Output Short Protection
  • Switching MOSFET Short Detection and Protection
  • 10V Gate Drive
  • Wide Input and Output Voltage Range Up to 100V
  • Feedback Voltage Tolerance: ±1.0% Over Temperature
  • Bidirectional Programmable Current Regulation and Monitoring
  • Extensive Self-Test, Diagnostics and Fault Reporting
  • Programmable Fixed or Synchronizable Switching Frequency: 80kHz to 600kHz
  • Programmable Soft-Start and Dynamic Current Limit
  • Masterless, Fault Tolerant Current Sharing
Additional Details
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The LT8228 is a 100V bidirectional constant-current or constant-voltage synchronous buck or boost controller with independent compensation network. The direction of the power flow is automatically determined by the LT8228 or externally controlled. The input and output protection MOSFETs protect against negative voltages, control inrush currents and provide isolation between terminals under fault conditions such as switching MOSFET shorts. In buck mode, the protection MOSFETs at the V1 terminal prevents reverse current. In boost mode, the same MOSFETs regulate the output inrush current and protects itself with an adjustable timer circuit breaker.

The LT8228 offers bidirectional input and output current limit as well as independent current monitoring. Masterless, fault tolerant current sharing allows any LT8228 in parallel to be added or subtracted while maintaining current sharing accuracy. Internal and external fault diagnostics and reporting are available via the FAULT and REPORT pins. The LT8228 is available in a 38-lead TSSOP package.

Applications

  • Dual Battery Automotive and Industrial Systems
  • High Power System Backup and Supply Stabilization
  • “N+1” Redundant, High Reliability Power Supplies
  • Power Interrupt Protection System
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file View Data Sheet (Rev.C)
Documentation View All Documentation
LTspice LT8228 - Step-Down (Buck) Regulators Download 8.9 KB
Part Models 12
1ku List Price Starting From $7.77
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LT8228

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Data Sheet

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UPDATED 11/14/2019
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LT8228: Bidirectional Synchronous 100V Buck/Boost Controller with Reverse Supply, Reverse Current and Fault Protection Data Sheet (Rev.C)

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UPDATED 11/14/2019
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LT8228: 逆電源、逆電流、および障害保護回路を内蔵した双方向同期整流式100V 降圧／昇圧コントローラ データシート

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User Guide

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UPDATED 11/19/2019
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DC2351A - Demo Manual redirect icon

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Informational

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UPDATED 06/15/2023
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UPDATED 02/01/2020
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New IC Eases the Design of 48 V/12 V Dual Battery Automotive Systems redirect icon

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UPDATED 02/01/2020
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新型IC简化48 V/12 V双电池汽车系统的设计 redirect icon

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UPDATED 02/01/2020
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デュアルバッテリの車載システムに最適な昇降圧コントローラ、48V/12Vを使用する設計が容易に redirect icon

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Documentation

Book & eBook 1

Power You Can Trust: Achieving Efficient Battery-Powered Solutions

Solutions Bulletin & Brochure 1

Industrial Battery-Powered Solutions

Analog Dialogue 2

Smart Battery Backup for Uninterrupted Energy Part 2: BBU Microcontroller Functions and Operations
Smart Battery Backup for Uninterrupted Energy Part 1: Electrical and Mechanical Design

Webcast 1

Powering Tomorrow's Data Centers: Battery Backup Unit Design and Challenges

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Video

2019-12-05

01:00

LT8228 - 100V Bidirectional Buck/Boost Controller with Protection

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT8228EFE#PBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228EFE#TRPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228HFE#PBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228HFE#TRPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228HFE#WPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228HFE#WTRPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228IFE#PBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228IFE#TRPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228IFE#WPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT8228IFE#WTRPBF 38-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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LT8228JFE#PBF 38-Lead TSSOP w/ EP external-link
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LT8228JFE#TRPBF 38-Lead TSSOP w/ EP external-link
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Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT8228EFE#PBF

PRODUCTION

LT8228EFE#TRPBF

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LT8228HFE#WPBF

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Material_Report

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Delta Qualification Matrix

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Mar 20, 2020

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

LT8228EFE#PBF

PRODUCTION

LT8228EFE#TRPBF

PRODUCTION

LT8228HFE#PBF

PRODUCTION

LT8228HFE#TRPBF

PRODUCTION

LT8228IFE#PBF

PRODUCTION

LT8228IFE#TRPBF

PRODUCTION

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Apr 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT8228EFE#PBF

PRODUCTION

LT8228EFE#TRPBF

PRODUCTION

LT8228HFE#PBF

PRODUCTION

LT8228HFE#TRPBF

PRODUCTION

LT8228HFE#WPBF

LT8228HFE#WTRPBF

LT8228IFE#PBF

PRODUCTION

LT8228IFE#TRPBF

PRODUCTION

LT8228IFE#WPBF

PRODUCTION

LT8228IFE#WTRPBF

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PCN22_0068_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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Mar 20, 2020

- 19_0067

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Notification of Wafer Fab Location Change for 0.35 BCD Process

LT8228EFE#PBF

PRODUCTION

LT8228EFE#TRPBF

PRODUCTION

LT8228HFE#PBF

PRODUCTION

LT8228HFE#TRPBF

PRODUCTION

LT8228IFE#PBF

PRODUCTION

LT8228IFE#TRPBF

PRODUCTION

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PCN19_0067_Form

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Material_Report

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Qualification Results Summary

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Software & Part Ecosystem

Evaluation Kits 1

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DC2351A

LT8228 Bidirectional Demo Board | 36V ≥ V1 ≥ 56V; 8V ≥ V2 ≥ 14V; V1 Max IOUT = 7A, V2 Max IOUT = 35A

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DC2351A

LT8228 Bidirectional Demo Board | 36V ≥ V1 ≥ 56V; 8V ≥ V2 ≥ 14V; V1 Max IOUT = 7A, V2 Max IOUT = 35A

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DC2351A
LT8228 Bidirectional Demo Board | 36V ≥ V1 ≥ 56V; 8V ≥ V2 ≥ 14V; V1 Max IOUT = 7A, V2 Max IOUT = 35A
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Product Detail

Demonstration circuit 2351A is a high voltage, high efficiency synchronous buck or boost DC/DC converter. It is designed to have 36V to 56V on one side and 8V to 14V on the other side. It can supply a 35A maximum output current in buck mode and delivers 7A of current in boost mode. The demo board features the LT8228EFE controller. This part can seamlessly transition from bucking to boosting. With built-in circuit breaker function and other protection features, the LT8228 is ideal for high reliability systems requiring N+1 redundancy or other protections in industrial, automotive, medical, military, and avionics applications.

The DC2351A is designed to be paralleled with other DC2351A boards to increase the total output current. With adequate heatsinking or airflow, the output current can be increased.

Resources

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DC2351A - Demo Manual Download

835.9 K

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DC2351A - Design Files Download

5.48 M

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DC2351A - Schematic Download

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Evaluation Kits1

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DC2351A

LT8228 Bidirectional Demo Board | 36V ≥ V1 ≥ 56V; 8V ≥ V2 ≥ 14V; V1 Max IOUT = 7A, V2 Max IOUT = 35A

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.

spice tool Lt Spice

LT8228 - Step-Down (Buck) Regulators Download

8.9 K

Reference Designs 1

Figure 1. CN0556 Simplified Block Diagram

CN0556

Programmable High Current and Voltage Source/Sink Power Supply

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CN0556

Programmable High Current and Voltage Source/Sink Power Supply

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CN0556

Circuits from the lab

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Programmable High Current and Voltage Source/Sink Power Supply

Features and Benefits

  • High Efficiency Buck or Boost DC-DC Converter
  • 14 V to 56 V Buck Input Voltage and 8 V to 14 V Boost Input Voltage
  • Fully Programmable Bidirectional Control and Monitoring
  • Seamless Buck-to-Boost Transition and Vice Versa
  • Buck Mode: 35 A Maximum Output Current
  • Boost Mode: 10 A Maximum Output Current
  • Undervoltage, Overvoltage, Overcurrent, and Reverse Current Protection
View Detailed Reference Design external link

Part Used 4

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Design & Integration Tools

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CN0556 Design and Integration Files link icon

9.72 M

Reference Designs1

Figure 1. CN0556 Simplified Block Diagram

CN0556

Programmable High Current and Voltage Source/Sink Power Supply

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