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25VIN 3A/6AOUT USB-C Buck-Boost Charger with Integrated FETs for 2S/3S Li-Ion Batteries

Industry's Highest Efficiency USB Type-C/Power Delivery Buck-Boost Charger with Integrated FETs and Power Path

Product Details

Key Features

Applications/Uses

Parametric specs for Battery Chargers
Charging VIN (V) (max) 24
Max. ICHG (A) 6
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 2
3
Protected VIN (V) (max) 30
Charger (V) 8 to 13.35
Oper. Temp. (°C) -40 to +85
Package/Pins FC2QFN/30
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 24
Max. ICHG (A) 6
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 2
3
Protected VIN (V) (max) 30
Charger (V) 8 to 13.35
Oper. Temp. (°C) -40 to +85
Package/Pins FC2QFN/30

Key Features

  • 3.5V to 25.4V Input Operating Range, 30VDC Withstand
  • 97% Peak Efficiency for 2S Battery at 9VIN/7.4VOUT/1.5AOUT
  • 97% Peak Efficiency for 3S Battery at 15VIN/12.6VOUT/2AOUT
  • MAX77960
    • 100mA to 3.15A Programmable Input Current Limit
    • 100mA to 3A Programmable Constant Current Charge
  • MAX77961
    • 100mA to 6.3A Programmable Input Current Limit
    • 100mA to 6A Programmable Constant Current Charge​
  • Remote Differential Voltage Sensing
  • 600kHz Switching Frequency
  • System Instant On with Smart Power Selector Power Path
  • ​Charge Safety Timer
  • Die Temperature Regulation with Thermal Foldback Loop
  • Input Power Management with Adaptive Input Current Limit (AICL) and Input Voltage Regulation
  • 10mΩ BATT to SYS Switch, Up to 10A Overcurrent Threshold
  • ​Reverse Buck Mode 5.1V/3A to Support USB OTG
  • JEITA Compliant with NTC Thermistor Monitor
  • I2C or Resistor Programmable
  • 4mm x 4mm, 30-Lead FC2QFN

Applications/Uses

  • USB Type-C Powered Wide-Input Charging Applications
  • 2- and 3-Cell Battery-Powered Devices
  • Smartphones, Tablets, and 2-in-1 Laptops
  • Medical Devices, Health and Fitness Monitors
  • Digital Still, Video, and Action Cameras
  • Handheld Computers and Terminals
  • Handheld Radios
  • Power Tools
  • Drones
  • Battery Backup
  • Wireless Speakers

Description

The MAX77960/MAX77961 are high-performance wide-input 3A (MAX77960)/6A (MAX77961) buck-boost chargers with Smart Power Selector™ and operate as a reverse buck converter without an additional inductor, allowing the ICs to power USB on-the-go (OTG) accessories. The devices integrate low-loss power switches and provide high efficiency, low heat, and fast battery charging in a small solution size. The reverse buck has true load disconnect and is protected by an adjustable output current limit. The devices are highly flexible and programmable through I2C configuration or autonomously through resistor configuration.

The battery charger includes the Smart Power Selector to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start up smoothly when an input source is available even when the battery is deeply discharged (dead battery) or missing. For battery safety/authentication reasons, the ICs can be configured to keep charging disabled, and allow the DC-DC to switch and regulate the SYS voltage. The system processor can later enable charging using I2C commands as appropriate. Alternatively, the ICs can be configured to automatically start charging.

Simplified Block Diagram

MAX77960, MAX77961: Simplified Block Diagram MAX77960, MAX77961: 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 .