The MAX77650/MAX77651 provide highly-integrated bat­tery charging and power supply solutions for low-power wearable applications where size and efficiency are critical. Both devices feature a SIMO buck-boost regulator that provides three independently programmable power rails from a single inductor to minimize total solution size. A 150mA LDO provides ripple rejection for audio and other noise-sensitive applications. A highly configu­rable linear charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA).

　　The devices include other features such as current sinks for driving LED indicators and an analog multiplexer that switches several internal voltage and current signals to an external node for monitoring with an external ADC. A bidi­rectional I2C interface allows for configuring and check­ing the status of the devices. An internal on/off controller provides a controlled startup sequence for the regulators and provides supervisory functionality when the devices are on. Numerous factory programmable options allow the device to be tailored for many applications, enabling faster time to market.

　　MAX7765优势和主要特性:

　　Highly IntegratedSmart Power Selector™ Li+/Li-Poly Charger

　　3 Output, Single-Inductor Multiple-Output (SIMO) Buck-Boost Regulator

　　150mA LDO

　　3-Channel Current Sink Driver

　　Analog MUX Output for Power Monitoring

　　Low Power0.3μA Standby Current

　　5.6μA Operating Current (3 SIMO Channels + LDO)

　　Charger Optimized for Small Battery SizeProgrammable Fast-Charge Current from 7.5mA to 300mA

　　Programmable Battery Regulation Voltage from 3.6V to 4.6V

　　Programmable Termination Current from 0.375mA to 45mA

　　JEITA Battery Temperature Monitors Adjust Charge Current and Battery Regulation Voltage for Safe Charging

　　Flexible and ConfigurableI2C Compatible Interface and GPIO

　　Factory OTP Options Available

　　Small Size2.75mm x 2.15mm x 0.7mm WLP Package

　　30-Bump, 0.4mm-Pitch WLP, 6x5 Array

　　Small Total Solution Size (19.2mm2)

　　MAX7765应用:

　　Bluetooth Headphones/Hearables

　　Fitness, Health, and Activity Monitors

　　Portable Devices

　　Internet of Things (IoT)

　　图1.MAX7765简化功能框图

　　图2.MAX7765典型应用电路图

　　MAX77650/MAX77651评估板EVK

　　The MAX77650/MAX77651 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77650/MAX77651. The EV kit allows for easy evaluation of the various MAX77650/ MAX77651 features, including the SIMO buck-boost regu­lator, linear regulator, analog multiplexer, smart battery charger, on/off controller, and I2C interface.

　　The MAX77650 and MAX77651 EV kits are identical aside from the device (U1), silkscreen, and two resis­tive dividers at the SIMO outputs. The MAX77650/ MAX77651 devices themselves have different output volt­age ranges for the SIMO buck-boost regulator. Consult the device data sheet for more information.

　　Windows®-based software provides a user-friendly graph­ical interface as well as a detailed register-based interface to exercise the features of the MAX77650/MAX77651.

　　MAX77650/MAX77651评估板EVK主要特性:

　　Easy to Use

　　GUI Drives I2C Interface

　　On-Board Battery Ammeter

　　On-Board Thermistor

　　On-Key Options

　　RGB LED Cluster

　　Assembled and Fully Tested

　　Emulates System Loading

　　On-Board Electronic Loads

　　Electronic Loads have steady-state, transient, and random modes

　　Demonstrates End-to-End Analog Multiplexer Implementation

　　On-Board ADC

　　Evaluates Both Push-Button and Slider-Switch On-Key Options

　　图3.MAX77650评估板EVK外形图

　　图4.MAX77650评估板EVK顶层元件分布图

　　图5.MAX77650评估板EVK底层元件分布图

　　图6.MAX77650评估板EVK电路图(1)

　　图7.MAX77650评估板EVK电路图(2)

　　图8.MAX77650评估板EVK电路图(3)

　　图9.MAX77650评估板EVK电路图(4)

　　图10.MAX77650评估板EVK电路图(5)

　　MAX77650评估板EVK材料清单(BOM):

　　图11.MAX77650评估板EVK PCB设计图(1)

　　图12.MAX77650评估板EVK PCB设计图(2)

　　图13.MAX77650评估板EVK PCB设计图(3)

　　图14.MAX77650评估板EVK PCB设计图(4)

　　图15.MAX77650评估板EVK PCB设计图(5)

　　图16.MAX77650评估板EVK PCB设计图(6)

　　MAXIM是美信公司(Maxim Integrated Products)的英文缩写，全球最好的模拟信号和混合信号半导体公司。同时MAXIM也是一款时尚潮流杂志的名字，maxim内容涵盖了音乐、体育、电视、电影、潮流名人等。也是比较温和的男性杂志，以更多的消遣内容为主。

　　2001年，Maxim并购了著名的Dallas Semiconductor。是全球最好的模拟信号和混合信号半导体公司.

　　它们的使命是不断创造高品质的模拟工程解决方案，在世界范围内为基于微处理器的电子产品客户提供增值服务。它们通过努力达到它们的成本与业绩Maxim Integrated Products成立于1983年，总部位于美国加利福尼亚的Sunnyvale，公司拥有9300多名员工，是世界范围内模拟和混合信号集成产品的设计、开发与生产领域的领导者之一。通过对温度、压力、声音等现实世界的各种信号进行检测、放大，并将其转换成计算机处理所需要的数字信号, Maxim的电路把现实世界与数字世界“连接”在一起。

　　目标、缩短新品上市时间并不断提高它们的生产能力，坚持不懈地为它们的客户和公司股权持有者提供最好的服务。

　　任何电子产品的核心都是一个数字核，它与人类、真实的物理世界、供电电源及其它数字系统相关联。Maxim是全球模拟、混合信号、高频及数字电路设计、研发、制造的领导者，所提供的产品能够实现上述数字内核与周边系统的连接。它们在世界范围内拥有大约35,000个大型客户。

　　它们的半导体产品是连接数字处理器与物理世界的桥梁。

　　详情请见:

MAX77650EVKIT-MAX77651EVKIT.pdf

MAX77650-MAX77651.pdf