MAX77986

新規設計に推奨

19VIN, 3.5/5.5A 1-Cell Li+ Battery Charger with Smart Power Selector and OTG for USBC PD

Industry's Highest-Efficiency Buck Charger for USB Type-C Power Delivery Applications

利用上の注意

本データシートの英語以外の言語への翻訳はユーザの便宜のために提供されるものであり、リビジョンが古い場合があります。最新の内容については、必ず最新の英語版をご参照ください。

なお、日本語版のデータシートは基本的に「Rev.0」(リビジョン0)で作成されています。そのため、英語版が後に改訂され、複数製品のデータシートがひとつに統一された場合、同じ「Rev.0」の日本語版のデータシートが異なる製品のデータシートとして表示されることがあります。たとえば、「ADM3307E」の場合、日本語データシートをクリックすると「ADM3311E」が表示されます。これは、英語版のデータシートが複数の製品で共有できるように1本化され、「ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E」(Rev.J)と改訂されたからで、決して誤ってリンクが張られているわけではありません。和文化されたデータシートを少しでも有効に活用していただくためにこのような方法をとっておりますので、ご了解ください。

アナログ・デバイセズ社は、提供する情報が正確で信頼できるものであることを期していますが、その情報の利用に関して、あるいはその利用によって生じる第三者の特許やその他の権利の侵害に関して一切の責任を負いません。また、アナログ・デバイセズ社の特許または特許の権利の使用を明示的または暗示的に許諾するものでもありません。仕様は予告なしに変更する場合があります。本紙記載の商標および登録商標は、各社の所有に属します。

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製品情報

  • High-Efficiency Single-Cell Switching Charger
    • Up to 5.5A Charging with MAX77986
    • Up to 3.5A Charging with MAX77985
    • 92% Buck Efficiency at 4A, 12V Input
    • 92% Charging Efficiency at 3.5A, 9V Input
    • Optimized for High Voltage Input Operation
    • Accelerate Charge Time by Monitoring Kelvin Sensing Battery Voltage
    • Up to 5.5A Input Current Limit with AICL (MAX77986)
    • Up to 3.5A Input Current Limit with AICL (MAX77985)
  • +28V Absolute Maximum Input Voltage Rating
  • 4.7V to 19V Input Operating Voltage Range
  • Reverse Boost with Programmable Output Voltage Options up to 12V
    • Up to 18W for MAX77986
    • Up to 12W for MAX77985
  • Safety
    • Battery Temperature Sensing and Charge Safety Timer
    • JEITA Guideline Compliant
    • Thermal Regulation and Thermal Shutdown
    • System Voltage OVLO/UVLO
  • Integrated Battery True-Disconnect FET
    • RDSON = 7.7mΩ
    • Programmable Discharge Current Limit up to 10A
    • Support Shipping Mode and Low Battery Leakage Current
    • 1.3MHz/2.6MHz Switching Frequency with 1μH/0.47μH Inductor
    • Disconnect Input (DISQBAT)
  • Spread Spectrum for Noise Sensitive Applications
  • Programmable Unplug Detection for 9V and 15V Sources
  • Charge Status Output for LED
  • Push-Button Input for Exiting from Ship Mode
  • External Discharge FET Enable Output
  • Dedicated Input for Suspend Mode (SUSPND)
  • I2C Interface
  • 4mm x 4mm FC2QFN

The MAX77985/MAX77986 is a high-performance high input range 3.5/5.5A fast charger with Smart Power SelectorTM. The IC can operate as a reverse boost without an additional inductor, allowing the battery to share its power through the charging port with voltage programmable from 5V to 12V. The device features fully integrated low-loss power switches to provide a small solution size and high efficiency, even at high input voltage and high charging current. Its high switching frequency allows the use of a smaller sized inductor. Li-ion, Li-polymer, and LiFePO4 battery chemistries are supported. The IC is compatible with USB Power Delivery sources with input current capability up to 5A. It can also provide fast unplug detection of 5V, 9V, and 15V sources for dynamic management of system load. The IC also helps mitigate EMI with the spread spectrum feature. The IC features true load disconnection in reverse boost mode and has an adjustable output current protection limit. The device is highly flexible and programmable through I2C configuration.

The battery charger includes a Smart Power Selector to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start up gracefully as soon as an input source is available, even when the battery is deeply discharged (dead battery) or missing. It can be configured so that when power is applied to the charger input, the battery charging can automatically start.

Note: For parts with chip revision 0b001 (PASS1), contact Analog Devices for Rev 0 of the data sheet. This information can be read from the CHIP_REVISION (0x01) register.

Applications

  • Gaming Devices
  • VR Applications
  • mPOS
  • Tablet PCs

MAX77986
19VIN, 3.5/5.5A 1-Cell Li+ Battery Charger with Smart Power Selector and OTG for USBC PD
MAX77985/MAX77986 Block Diagram
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ソフトウェア・リソース

評価用ソフトウェア 2

MAX77985/86 Evaluation Kit Software, 1.0.6-x64

 

MAX77985/86 Evaluation Kit Software, 1.0.6-x86

 


ツールおよびシミュレーション


評価用キット

eval board
EVAL-MAX77985-77986

MAX77985/MAX77986 Evaluation Kits

機能と利点

  • High-Efficiency Single-Cell Switching Charger
    • Up to 5.5A Charging with MAX77986
    • 92% Buck Efficiency at 4A, 12V Input
  • +28V Absolute Maximum Input Voltage Rating
  • 4.7V to 19V Input Operating Voltage Range
  • Reverse Boost with Programmable Output Voltage Options up to 12V
  • Charge Status Output for LED
  • Push-Button Input for Exiting from Ship Mode
  • External Discharge FET Enable Output
  • Dedicated Input for Suspend Mode (SUSPND)
  • Spread Spectrum for Noise Sensitive Applications
  • Programmable Unplug Detection for 9V and 15V Source
  • USB Type-C Standalone Controller Support Customizable Firmware
  • USB Type-C Version 1.3 and PD 3.0 Compliant
  • Sink/Source/DRP Port Support
  • PPS Sink Support
  • Fast Role Swap Initial Sink Support
  • Integrated VCONN Switch with OCP
  • Support Try.Snk
  • Support BC1.2 Legacy Charger Detection

製品詳細

The MAX77985/MAX77986 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77985A/MAX77985B/MAX77986A/ MAX77986B single-cell lithium-ion battery charger.

The MAX7798XX series of IC is for 1S Li+ battery applications and can operate with a 4.7V to 19V input voltage with a maximum charging current of 3.5/5.5A. The IC offers a reverse boost as well as fully integrated low power loss switches to provide a small solution size and high efficiency. The EV kit demonstrates the performance of the IC and provides the convenience of evaluating full USB Type-C® PD solutions with the MAX77958 USB Type-C PD controller. This combination allows fast charging of the battery through the USB Type-C port as well as reverse powering the USB Type-C port with battery OTG mode.

A Micro-B USB cable is included in the package to serve as the interface from a USB port on a Windows PC to the slave I2C port on the IC. Windows®-based graphical user interface (GUI) software provides a user-friendly interface to exercise the features of the IC.

EVAL-MAX77985-77986
MAX77985/MAX77986 Evaluation Kits
MAX77985-MAX77986 EVKIT Board Photo Angle MAX77985-MAX77986 EVKIT Board Photo Top MAX77985-MAX77986 EVKIT  Board Photo Bottom

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