LT8228

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. C) Product Selection Table
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Overview

  • 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
LT8228
Bidirectional Synchronous 100V Buck/Boost Controller with Reverse Supply, Reverse Current and Fault Protection 
LT8228 Application Circuit LT8228 Performance Graph LT8228 Performance Graph LT8228 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

Informational 1

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Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LT8228
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
schematic 1
DC2351A

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

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Product Details

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.

eval board
schematic 2
DC2351A

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

Buy Now View Details

Product Details

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

Reference Designs

Figure 1. CN0556 Simplified Block Diagram
Figure 1. CN0556 Simplified Block Diagram
EVAL-CN0556-EBZ Evaluation Board - Angle View
EVAL-CN0556-EBZ Evaluation Board - Top View
EVAL-CN0556-EBZ Evaluation Board - Bottom View
CN0556 Circuits from the lab

Programmable High Current and Voltage Source/Sink Power Supply

View Detailed Reference Design

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
CN0556
Programmable High Current and Voltage Source/Sink Power Supply
Figure 1. CN0556 Simplified Block Diagram
EVAL-CN0556-EBZ Evaluation Board - Angle View
EVAL-CN0556-EBZ Evaluation Board - Top View
EVAL-CN0556-EBZ Evaluation Board - Bottom View

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