MAX77785

推荐新设计使用

18.2VIN, 3.5A 1-Cell Li+ Battery Charger for USB Type-C Power Delivery

数据手册 (Rev. 0) 产品选型表
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产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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产品详情

  • High-Efficiency Single-Cell Switching Charger
    • Up to 5.5A Charging with MAX77786
    • Up to 3.5A Charging with MAX77785
    • 90% Buck Efficiency at 4A, 15V Input
    • Up to 5.5A Input Current Limit with AICL (MAX77786)
    • Up to 3.5A Input Current Limit with AICL (MAX77785)
  • +26V Absolute Maximum Input Voltage Rating
  • 4.7V to 18.2V Input Operating Voltage Range
  • Reverse Boost with Programmable Output Voltage Options up to 10.805V
    • Up to 16.2W for MAX77786
    • Up to 10.8W for MAX77785
    • Dedicated Boost enable input
  • Integrated Battery True-Disconnect FET
    • RDSON = 7.7mΩ
    • Programmable Discharge Current Limit up to 10A
    • Shipping Mode and Low Battery Leakage Current
    • 1.3MHz Switching Frequency with 1μH Inductor
    • Disconnect Input (DISQBAT)
  • Safety
    • Battery Temperature Sensing and Charge Safety Timer
    • JEITA Guideline Compliant
    • Thermal Regulation and Thermal Shutdown
    • System Voltage OVLO/UVLO
  • USB Switch with BC1.2 Detection
  • Spread Spectrum for Noise-Sensitive Applications
  • Charge Status Output for LED
  • Push-Button Input for Exiting from Ship Mode
  • Programmable Unplug Detection Output
  • Dedicated Input for Suspend Mode (SUSPND)
  • I2C Interface
  • 2.96 mm x 2.96 mm WLP
MAX77785
18.2VIN, 3.5A 1-Cell Li+ Battery Charger for USB Type-C Power Delivery
MAX77785 / MAX77786 Simplified Block Diagram
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参考资料

数据手册 1

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软件资源

Evaluation Software 1

硬件生态系统

部分模型 产品周期 描述
MAX77985
量产 具有Smart Power Selector和OTG USBC PD功能的19VIN、3.5/5.5A 1节锂离子电池充电器
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评估套件

eval board
schematic 1
schematic 2
schematic 3
MAX77785EVKIT#

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特性和优点

  • High-Efficiency Single-Cell Switching Charger
    • Up to 5.5A Charging with the MAX77786
    • 90% Buck Efficiency at 4A, 15V Input
  • 4.7V to 18.2V Input Operating-Voltage Range
  • Reverse Boost with Programmable Output-Voltage Options up to 10.805V
  • Charge-Status Output for LED
  • Push-Button Input for Exiting from Ship Mode
  • Dedicated Input for Suspend Mode (SUSPND)
  • USB Type-C Version 1.3- and PD 3.0-Compliant
  • Sink/Source/DRP Port Support
  • Programmable Power Supply (PPS) Sink Support
  • Fast Role-Swap Initial Sink Support
  • Integrated VCONN Switch with Overcurrent Protection (OCP)
  • Support Try.Snk State
  • Battery Charging 1.2 (BC1.2) Legacy Charger Detection
  • Programmable Unplug Detection

产品详情

The MAX77785/MAX77786 evaluation kits (EV kit) are fully assembled and tested printed circuit boards (PCB) that demonstrate the MAX77785/MAX77786 single-cell lithium-ion battery chargers.

The MAX77785/MAX77786 are for 1S Li+ battery applications and can operate with a 4.7V to 18.2V input voltage with a maximum charging current up to 3.5A/5.5A. The MAX77785/MAX77786 ICs offer a reverse boost as well as fully integrated low-power loss switches to provide small solution size and high efficiency. The EV kits demonstrate the performance of the MAX77785/MAX77786 charger and provide the convenience of evaluating full USB Type-C® power-delivery (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 on-the-go (OTG) mode.

A Micro-B USB cable is included in the EV kit to serve as the interface from a USB port on a Windows® PC to the subordinate I2C port on the MAX77785/MAX77786.

MAX77785EVKIT#
MAX77785EVKIT/MAX77786EVKIT Angle View MAX77785EVKIT/MAX77786EVKIT Bottom View MAX77785EVKIT/MAX77786EVKIT Top View

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