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特性
- 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
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The MAX77785/MAX77786 is a high-performance high-input 3.5/5.5A fast charger with Smart Power Selector™. The ICs can operate as a reverse boost converter without an additional inductor, allowing the battery to share its power through the charging port, and offer programmable output voltage from 4.505V to 10.805V. The devices feature 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. The ICs feature true load disconnection in reverse boost mode and have an adjustable output current protection limit. The device is highly flexible and programmable through I2C configuration. Li-ion, Li-polymer, and LiFePO4 battery chemistries are supported. It can also provide fast programmable unplug detection of sources for dynamic system load management. To support a variety of legacy USBs as well as proprietary adapters, the device also integrates BC1.2 detection using the D+ and D- pins.
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 when 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.
Applications
- Gaming Devices
- VR Applications
- mPOS
- Tablet PCs
Smart Power Selector is a trademark of Maxim Integrated Products, Inc.
USB Type-C is a registered trademark of USB Implementers Forum, Inc.
Power Path is a trademark of Linear Technology Corporation.
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参考资料
ADI 始终高度重视提供符合最高质量和可靠性水平的产品。我们通过将质量和可靠性检查纳入产品和工艺设计的各个范围以及制造过程来实现这一目标。出货产品的“零缺陷”始终是我们的目标。查看我们的质量和可靠性计划和认证以了解更多信息。
| 产品型号 | 引脚/封装图-中文版 | 文档 | CAD 符号，脚注和 3D模型 |
|---|---|---|---|
| MAX77786EWJ+ | 49-WLCSP-N/A |
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| MAX77786EWJ+T | 49-WLCSP-N/A |
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- MAX77786EWJ+
- 引脚/封装图-中文版
- 49-WLCSP-N/A
- 文档
-
HTML
Material Declaration
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HTML
Reliablity Data
- CAD 符号，脚注和 3D模型
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Ultra Librarian
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SamacSys
- MAX77786EWJ+T
- 引脚/封装图-中文版
- 49-WLCSP-N/A
- 文档
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD 符号，脚注和 3D模型
-
Ultra Librarian
-
SamacSys
软件和型号相关生态系统
| 部分模型 | 产品周期 | 描述 |
|---|---|---|
|
推荐新设计使用 |
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 |
评估套件 1
MAX77786EVKIT#
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.
资料
