Maxim MAX77650锂电池超低功耗充电解决方案

Maxim公司的MAX77650/MAX77651是具有三输出单电感多输出(SIMO)和充电器的超低功耗PMIC,为低功耗可穿戴应用提供高度集成的电池充电和电源解决方案.可编程快速充电电流7.5mA-300mA,可编程电池电压33.6V-4.6V,可编程端电流0.375mA-45mA,主要用在蓝牙耳机,健美健康和蔼活动监视器,物联网(IoT)和手持设备.本文介绍了MAX77650主要特性,框图,应用电路以及评估板MAX77650 EV主要特性,电路图,材料清单和PCB设计图.
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.
MAX77650主要特性:
Highly Integrated
Smart 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 Power
0.3µA Standby Current
5.6µA Operating Current (3 SIMO Channels + LDO)
Charger Optimized for Small Battery Size
Programmable Fast-C...