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USB Type-C, 3A Switch-Mode Buck Charger with Integrated CC Detection, Reverse Boost, and ADC

Industry's First USB Type-C Charger with Integrated CC Detection and BC1.2 Detection, Ease of Design in a Small Package

Product Details

The MAX77860 is a high-performance single input switch mode charger that features USB Type-C CC detection capability in addition to reverse boost capability and a Safeout LDO.

This switched-mode battery charger with two integrated switches, provides small inductor and capacitor sizes, programmable battery charging current, and is ideally suited for portable devices such as smartphones, IoT devices, and other Li-ion battery powered electronics. The charger features a single input, which works for both USB and high voltage adapters. It supports USB Type-C CC detection under BC 1.2 specification, and the power-path switch is integrated in the chip. All MAX77860 blocks connected to the adapter/USB pin are protected from input overvoltage events up to 14V. The USB-OTG output provides true-load disconnect and is protected by an adjustable output current limit. It has an input current limit up to 4.0A and can charge a single-cell battery up to 3.15A. When configured in reverse-boost mode, the IC requires no additional inductors to power USB-OTG accessories. The switching charger is designed with a special CC, CV, and die temperature regulation algorithm, as well as I2C programmable settings to accommodate a wide range of battery sizes and system loads. The on-chip ADC can help monitor the charging input voltage/current, battery voltage, charging/discharging current, and the battery temperature.

The MAX77860 communicates through an I2C 3.0 compatible serial interface consisting of a bidirectional serial data line (SDA) and a serial clock line (SCL). The IC is available in a 3.9mm x 4.0mm, 81-bump (9 x 9 array), 0.4mm pitch, wafer-level package (WLP).

Design Solution: How to Shrink Your USB Type-C Battery Charger ›

Key Features

  • Single-Cell 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 Resistor
    • CC, CV, and Die Temperature Control
    • Supports USB-OTG Reverse Boost, 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/Uses

  • USB Type-C Charging for 1S Li-ion Applications
  • Mobile Point-of-Sale Devices
  • Portable Medical Equipment
  • Portable Industrial Equipment
Parametric specs for Battery Chargers
Charging VIN (V) (max) 14
Max. ICHG (A) 3
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 16
Charger (V) 4.5
Oper. Temp. (°C) -40 to +85
Package/Pins WLP/81
Budgetary
Price (See Notes)
$3.18 @1k
Parametric specs for USB Charger Detectors
Protocol BC1.2
USB Type-C
VSUPPLY (Single) (V) (min) 4
VSUPPLY (Single) (V) (max) 14
Supported USB Battery Charging Specification BC1.2
USB Type-C
VBUS Tolerance (V) 16
ESD Protection ±15kV HBM
Package/Pins WLP/81
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Simplified Block Diagram

MAX77860: Simplified Block Diagram MAX77860: Simplified Block Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX77860 evaluation system (EV system) is a fully assembled and tested surface-mount printed circuit board (PCB) that evaluates the single input switched-mode battery charger featuring USB Type-C CC detection and charging capability in addition to reverse boost capability and a safest LDO.

The MAX77860 EV system includes the integrated circuit (IC) evaluation board with an integrated I2C interface and a MINIQUSB communication device. Windows® based graphical user interface (GUI) software is available for use with the EV system and can be downloaded from the MAX77860 product page on the Maxim website. A Windows 7 or newer operating system is required to use the EV kit GUI software.

View Details

Features

  • Evaluates MAX77860 Single-Input Switch Mode Charger
  • Demonstrates 4.0V to 13.5V Input Operation Range
  • Demonstrates USB Type-C Charging Up to 3.15A
  • Demonstrates Adapter Detection
  • Demonstrates USB-OTG Functionality
  • Assembled and Tested
  • I2C Serial Interface

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 14
Max. ICHG (A) 3
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 16
Charger (V) 4.5
Oper. Temp. (°C) -40 to +85
Package/Pins WLP/81
Budgetary
Price (See Notes)
$3.18 @1k
Parametric specs for USB Charger Detectors
Protocol BC1.2
USB Type-C
VSUPPLY (Single) (V) (min) 4
VSUPPLY (Single) (V) (max) 14
Supported USB Battery Charging Specification BC1.2
USB Type-C
VBUS Tolerance (V) 16
ESD Protection ±15kV HBM
Package/Pins WLP/81

Key Features

  • Single-Cell 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 Resistor
    • CC, CV, and Die Temperature Control
    • Supports USB-OTG Reverse Boost, 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/Uses

  • USB Type-C Charging for 1S Li-ion Applications
  • Mobile Point-of-Sale Devices
  • Portable Medical Equipment
  • Portable Industrial Equipment

Description

The MAX77860 is a high-performance single input switch mode charger that features USB Type-C CC detection capability in addition to reverse boost capability and a Safeout LDO.

This switched-mode battery charger with two integrated switches, provides small inductor and capacitor sizes, programmable battery charging current, and is ideally suited for portable devices such as smartphones, IoT devices, and other Li-ion battery powered electronics. The charger features a single input, which works for both USB and high voltage adapters. It supports USB Type-C CC detection under BC 1.2 specification, and the power-path switch is integrated in the chip. All MAX77860 blocks connected to the adapter/USB pin are protected from input overvoltage events up to 14V. The USB-OTG output provides true-load disconnect and is protected by an adjustable output current limit. It has an input current limit up to 4.0A and can charge a single-cell battery up to 3.15A. When configured in reverse-boost mode, the IC requires no additional inductors to power USB-OTG accessories. The switching charger is designed with a special CC, CV, and die temperature regulation algorithm, as well as I2C programmable settings to accommodate a wide range of battery sizes and system loads. The on-chip ADC can help monitor the charging input voltage/current, battery voltage, charging/discharging current, and the battery temperature.

The MAX77860 communicates through an I2C 3.0 compatible serial interface consisting of a bidirectional serial data line (SDA) and a serial clock line (SCL). The IC is available in a 3.9mm x 4.0mm, 81-bump (9 x 9 array), 0.4mm pitch, wafer-level package (WLP).

Design Solution: How to Shrink Your USB Type-C Battery Charger ›

Simplified Block Diagram

MAX77860: Simplified Block Diagram MAX77860: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal