LT8228
Info : RECOMMENDED FOR NEW DESIGNS
searchIcon
cartIcon

LT8228

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

Show More showmore-icon

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
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
show more Icon

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
Part Models 12
1ku List Price Starting From $7.77

close icon
Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT8228EFE#PBF
  • HTML
  • HTML
LT8228EFE#TRPBF
  • HTML
  • HTML
LT8228HFE#PBF
  • HTML
  • HTML
LT8228HFE#TRPBF
  • HTML
  • HTML
LT8228HFE#WPBF
  • HTML
  • HTML
LT8228HFE#WTRPBF
  • HTML
  • HTML
LT8228IFE#PBF
  • HTML
  • HTML
LT8228IFE#TRPBF
  • HTML
  • HTML
LT8228IFE#WPBF
  • HTML
  • HTML
LT8228IFE#WTRPBF
  • HTML
  • HTML
LT8228JFE#PBF
  • HTML
  • HTML
LT8228JFE#TRPBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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

LT8228IFE#WTRPBF

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

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

arrow down

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

LT8228IFE#WTRPBF

Mar 20, 2020

- 19_0067

arrow down

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

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC2351A

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

zoom

DC2351A

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

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

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.

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.

Reference Designs

Reference Designs 1

Figure 1. CN0556 Simplified Block Diagram

Programmable High Current and Voltage Source/Sink Power Supply

zoomopens a dialog

CN0556

Programmable High Current and Voltage Source/Sink Power Supply

CN0556

Circuits from the lab

tooltip Info:Circuits from the lab
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

Design & Integration Tools

pdf icon

ZIP

9.72 M

Recently Viewed