Analog Devices / Maxim Integrated MAX77860 Switch-Mode Buck Charger
Analog Devices MAX77860 Switch-Mode Buck Charger features a USB Type-C™ CC detection capability with reverse boost capability and a Safe out LDO. The MAX77860 offers two integrated switches, small inductor and capacitor sizes, and a programmable battery charging current. The device has a single input, which works for both USB and high-voltage adapters. The device supports USB Type-C CC detection under BC 1.2 specification. The MAX77860 blocks connected to the adapter/USB pin are protected from input overvoltage events up to 14V.
The USB-OTG output allows true load disconnect and is protected by an adjustable output current limit. When configured in reverse-boost mode, the IC requires no additional inductors to power USB-OTG accessories. The switching charger accommodates various battery sizes and system loads using a particular CC, CV, and die temperature regulation algorithm and I2C programmable settings. The Analog Devices MAX77860 Switch-Mode Buck Charger communicates through an I2C 3.0 compatible serial interface with a bidirectional serial data line (SDA) and a serial clock line (SCL). The MAX77860 is ideally suited for portable devices such as smartphones, IoT devices, and other Li-ion battery-powered electronics.
Features
- Single-input switch mode charger
- Up to 14V protection
- 4.0V to 13.5V input operating range
- Switching charger with D+/D- charger detection
- Up to 4.0A input current limit with Adaptive Input Current Limit (AICL)
- Up to 3.15A battery charging current limit
- Optional external sense resisbtor
- CC, CV, and die temperature control
- Supports USB-OTG reverse oost, up to 1.5A current limit
- Master-slave charging capability, up to 6A charge current
- Integrated battery true-disconnect FET
- Rated up to 9ARMS, discharge current limit (programmable)
- USB Type-C detection
- Integrated VCONN switch
- CC pin
- D+/D- detection for USB HVDCP
- BC 1.2 support
- One safeout LDO
- I2C-compatible interface
Applications
- USB Type-C charging for 1S Li-ion applications
- Mobile point-of-sale devices
- Portable medical equipment
- Portable industrial equipment
Evaluation Kit
Analog Devices / Maxim Integrated MAX77860 Evaluation Kit
A fully assembled and tested circuit for evaluating the MAX77860 battery charger.
Block Diagram
Videos
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