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Power Line Communication with ModelGauge Fuel Gauge and Buck-Boost Converter

Industry's First Battery Management System with Power Line Communication

Product Details

Key Features

Simplified Block Diagram

Technical Docs

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.

Key Features

  • Power Line Communication (PLC) Interface
    • 100kpbs System Throughput
    • 166.7kbps Bit Rate
    • 200mA per Output Charging Current
    • Automatic Earbud Insertion/Removal Detection
    • 4Mbaud, Half-Duplex, Data-Only UART Mode
    • PLC Controllable GPIOs, Reset and Shipping Mode
  • High-Efficiency Autonomous Charging System
    • 90% End-to-End Charging Efficiency from Master to Slave Battery
    • 200mA per Output Charging/System Current
    • Integrated 3.3W Buck-Boost
    • Automatic DVS for each Earbud to Optimize Charging Efficiency
  • Robust PLC Output Protection Features
    • Highly Flexible Moisture Detection Block
    • Programmable Overcurrent Protection
    • 8kV Contact ESD Protection
  • Small Solution Size
    • Small Single 1608 Inductor
    • 3.08mm x 2.83mm, 42-Bump Wafer-Level Package (WLP)

Applications/Uses

  • Augmented reality glasses
  • TWS Headphones
  • Wearable Devices

Description

The MAX20355 is a Power Line Communication (PLC) master with ModelGauge™ m5 EZ fuel gauge and buck-boost converter. The MAX20355 and MAX20357 provide a complete system solution for charging and data transfer between a charging case and a battery-powered device over a single contact.

The PLC interface is capable of 100kpbs throughput while simultaneously providing 400mA of total charging/system current. A 4Mbaud half-duplex data-only UART mode provides an easy and fast method for firmware updates, debugging interface, and factory modes.

MAX20355 utilizes a 3.3W buck-boost converter with dynamic voltage scaling (DVS) to automatically manage the charging voltage based on the slave device MAX20357 control signal.

Additional features include comprehensive slave device insertion and removal notifications, moisture detection, overcurrent protection, and 8kV contact rated ESD protection on the PLC outputs.

Simplified Block Diagram

MAX20355: Functional Diagram MAX20355: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.