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23VIN 3.2AOUT USB-C Buck-Boost Charger with Integrated FETs for 2S Li-Ion Batteries

Industry's Smallest Buck-Boost Charger with Wide Input Range for USB Type-C/Power Delivery Applications

Product Details

Key Features

Applications/Uses

Parametric specs for Battery Chargers
Charging VIN (V) (max) 23
Max. ICHG (A) 3.2
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 2
Protected VIN (V) (max) 30
Charger (V) 8.10 to 8.86
Oper. Temp. (°C) -40 to +85
Package/Pins WLP/49
Budgetary
Price (See Notes)
2.35
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 23
Max. ICHG (A) 3.2
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 2
Protected VIN (V) (max) 30
Charger (V) 8.10 to 8.86
Oper. Temp. (°C) -40 to +85
Package/Pins WLP/49
Budgetary
Price (See Notes)
2.35

Key Features

  • 3.5V to 23V Input Operating Range, 30VDC Withstand Voltage
  • Reverse Leakage Protection
  • 50mA to 3.15A Programmable Input Current Limit
  • 50mA to 3.2A Programmable Constant Current Charge
  • Remote Differential Voltage Sensing
  • 600kHz or 1.2MHz Switching Frequency Options
  • 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/1.5A to Support USB OTG
  • JEITA Compliant with NTC Thermistor Monitor
  • I2C or Resistor Programmable
  • 3.458mm x 3.458mm 49-Bump WLP

Applications/Uses

  • USB Type-C Powered Wide-Input Charging Applications
  • 2-Cell Battery Powered Devices

Description

The MAX77962 is a high-performance wide-input 3.2A buck-boost charger with a Smart Power Selector™ and operates as a reverse buck without an additional inductor, allowing the IC to power USB On-the-Go (OTG) accessories. The device integrates low-loss power switches, and provides small solution size, high-efficiency, low heat, and fast battery charging. The reverse buck has true-load disconnect and is protected by an adjustable output cur- rent limit. The device is highly flexible and programmable through I2C configuration or autonomously through resistor configuration.

The battery charger includes a Smart Power Selector to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start up gracefully when an input source is available even when the battery is deeply discharged (dead battery) or missing. For battery safety/authentication reasons, the IC 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 the appropriate I2C commands. Alternatively, the IC can be con- figured to automatically start charging.

Simplified Block Diagram

MAX77962: Simplified Block Diagram MAX77962: 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 .