MAX77787

RECOMMENDED FOR NEW DESIGNS

3.15A USB Type-C Autonomous Charger with JEITA for 1-Cell Li-ion/LiFePO4 Batteries

Autonomous USB Type-C Charger with JEITA

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • Up to 16V Protection
  • 13.4V Maximum Input Operating Voltage
  • 3.15A Maximum Charging Current
  • 6A Discharge Current Protection
    • No Firmware or Communication Required
    • Integrated CC Detection for USB Type-C
    • Integrated BC1.2 Detection for Legacy SDP, DCP, CDP, and DCD Timeout
    • Integrated USB Detection for Common Proprietary Charger Types
    • Automatic Input Current Limit Configuration
    • Input Voltage Regulation with Adaptive Input Current Limit (AICL)
  • 5.1V, 1.5A OTG Mode and BYP Reverse Boost
  • Safety
    • Charge Safety Timer
    • JEITA Compliance with NTC Thermistor Monitor
    • Thermal Shutdown
  • Pin Control of all Functions
    • Resistor Configurable Fast-Charge Current/Input Current Limit/Termination Voltage
    • ENBST Pin to Enable and Disable Reverse Boost
    • STAT Pin to Indicate Charging Status
    • INOKB Pin to Indicate Input Power-OK
    • CHGENB Pin to Enable and Disable Charging
    • STBY Pin to Support Suspend Mode
    • THM Pin to Monitor Thermistor
  • Integrated Power Path
  • Integrated Battery True-Disconnect FET
  • 2.758mm x 2.758mm, 6 x 6 WLP

The MAX77787 is a standalone, 3.15A charger with integrated USB Type-C® CC detection and reverse-boost capability. The fast-charge current and termination voltage is easily configured with resistors. The IC operates with an input voltage of 4.5V to 13.4V and has a maximum input current limit of 3A. The IC also implements the adaptive input current limit (AICL) function that regulates the input voltage by reducing input current to prevent the voltage of a weak adapter from collapsing or folding back.

The USB Type-C Configuration Channel (CC) detection pins on the IC enable automatic USB Type-C power source detection and input current limit configuration without any software control as soon as the USB plug is inserted. The IC also integrates BC1.2 and proprietary adapter detection using the D+ and D- pins.

The IC offers reverse-boost capability up to 5.1V, 1.5A, that can be enabled with the ENBST pin, also BYP reverse-boost that can be enabled with the ENBST and STBY pin combination. The STAT pin indicates charging status, while the INOKB pin indicates valid input voltage. Charging can be stopped by pulling the CHGENB pin low.

The IC is equipped with a Smart Power Selector™ and a battery true-disconnect FET to control the charging and discharging of the battery or isolate the battery in case of a fault. The IC supports Li-ion batteries with JEITA compliance. It also has another option that supports LiFePO4 batteries with non-JEITA compliance. The IC comes in a 2.758mm x 2.758mm, 0.4mm pitch, 6 x 6 wafer-level package (WLP) making it suitable for low-cost PCB assembly.

Applications

  • Mobile Point-of-Sale (mPOS) Terminals
  • Portable Medical Devices
  • Wireless Headphones
  • GPS Trackers
  • Charging Cradles for Wearable Devices
  • Power Banks
  • Mobile Routers
MAX77787
3.15A USB Type-C Autonomous Charger with JEITA for 1-Cell Li-ion/LiFePO4 Batteries
MAX77787 Simplified Block Diagram MAX77787 Typical Application Circuit MAX77787 Pin Configuration
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Documentation

Data Sheet 1

Technical Articles 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Battery Charger ICs 2
MAX77757
RECOMMENDED FOR NEW DESIGNS 3.15A USB Type-C Autonomous Charger with JEITA for 1-Cell Li-ion/LiFePO4 Batteries
MAX77751
PRODUCTION 3.15A USB Type-C Autonomous Charger for 1-Cell Li+ Batteries
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Evaluation Kits

eval board
schematic 1
MAX77787JEVKIT

Evaluation Kit for the MAX77787

Buy Now View Details

Features and Benefits

  • Up to 16V Protection
  • 13.7V Maximum Input Operating Voltage
  • 3.15A Maximum Charging Current
  • 6A Discharge Current Protection
  • No Firmware or Communication Required
  • Integrated USB Detection
    • Integrated CC Detection for USB Type-C
    • Integrated BC1.2 Detection for Legacy SDP, DCP, and CDP
    • Automatic Input Current Limit Configuration
  • Input Voltage Regulation with Adaptive Input Current Limit (AICL)
  • 5.1V, 1.5A OTG Mode and BYP Reverse Boost
  • Termination Voltage
    • 4.1V to 4.55V for Li-ion and Li-poly Batteries
    • 3.6V/3.7V for LiFePO4 Battery
  • Safety
    • Charge Safety Timer
    • JEITA Compliance with NTC Thermistor (MAX77787J)
    • HOT/COLD Stop Charging with NTC Thermistor (MAX77787H)
    • Thermal Shutdown
  • Pin Control of all Functions
    • Resistor-Configurable Fast-Charge Current, Termination Voltage, and Input Current Limit
    • ENBST Pin to Enable and Disable Reverse Boost
    • STAT Pin to Indicate Charging Status
    • INOKB Pin to Indicate Input Power-OK (POK)
    • CHGENB Pin to Enable and Disable Charging
    • STBY Pin to Support Suspend Mode
    • THM Pin to Monitor Thermistor
  • Fixed Resistor Options to Easily set Fast-Charge Current, Termination Voltage, and Input Current Limit
  • Integrated Power Path
  • Integrated Battery True-Disconnect FET
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX77787 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77787, standalone 3.15A USB Type-C® autonomous charger with JEITA.

The MAX77787 can operate from 4.5V to 13.7V input, with a fast charge current up to 3.15A and a maximum input current limit of 3A. The MAX77787 is offered to support Li-ion batteries with JEITA compliance. It also has another option that supports LiFePO4 batteries with non-JEITA compliance.

The EV kit features USB Type-C CC detection, battery charging compliant with the USB Battery Charging Specification Revision 1.2 (BC1.2), proprietary adapter detection upon input insertion, and automatic configuration of the charger input current limit to the maximum allowable current from the input source.

The MAX77787 has the reverse-boost capability, which is enabled by the ENBST pin to allow the 5.1V/1.5A output to CHGIN. The EV kit includes the variable resistor and thermistor to demonstrate the JEITA compliance.

Applications

  • Mobile Point-of-Sale (mPOS) Terminals
  • Portable Medical Devices
  • Wireless Headphones
  • GPS Trackers
  • Charging Cradles for Wearable Devices
  • Power Banks
  • Mobile Routers

eval board
schematic 2
MAX77787HEVKIT

Evaluation Kit for the MAX77787

Buy Now View Details

Features and Benefits

  • Up to 16V Protection
  • 13.7V Maximum Input Operating Voltage
  • 3.15A Maximum Charging Current
  • 6A Discharge Current Protection
  • No Firmware or Communication Required
  • Integrated USB Detection
    • Integrated CC Detection for USB Type-C
    • Integrated BC1.2 Detection for Legacy SDP, DCP, and CDP
    • Automatic Input Current Limit Configuration
  • Input Voltage Regulation with Adaptive Input Current Limit (AICL)
  • 5.1V, 1.5A OTG Mode and BYP Reverse Boost
  • Termination Voltage
    • 4.1V to 4.55V for Li-ion and Li-poly Batteries
    • 3.6V/3.7V for LiFePO4 Battery
  • Safety
    • Charge Safety Timer
    • JEITA Compliance with NTC Thermistor (MAX77787J)
    • HOT/COLD Stop Charging with NTC Thermistor (MAX77787H)
    • Thermal Shutdown
  • Pin Control of all Functions
    • Resistor-Configurable Fast-Charge Current, Termination Voltage, and Input Current Limit
    • ENBST Pin to Enable and Disable Reverse Boost
    • STAT Pin to Indicate Charging Status
    • INOKB Pin to Indicate Input Power-OK (POK)
    • CHGENB Pin to Enable and Disable Charging
    • STBY Pin to Support Suspend Mode
    • THM Pin to Monitor Thermistor
  • Fixed Resistor Options to Easily set Fast-Charge Current, Termination Voltage, and Input Current Limit
  • Integrated Power Path
  • Integrated Battery True-Disconnect FET
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX77787 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77787, standalone 3.15A USB Type-C® autonomous charger with JEITA.

The MAX77787 can operate from 4.5V to 13.7V input, with a fast charge current up to 3.15A and a maximum input current limit of 3A. The MAX77787 is offered to support Li-ion batteries with JEITA compliance. It also has another option that supports LiFePO4 batteries with non-JEITA compliance.

The EV kit features USB Type-C CC detection, battery charging compliant with the USB Battery Charging Specification Revision 1.2 (BC1.2), proprietary adapter detection upon input insertion, and automatic configuration of the charger input current limit to the maximum allowable current from the input source.

The MAX77787 has the reverse-boost capability, which is enabled by the ENBST pin to allow the 5.1V/1.5A output to CHGIN. The EV kit includes the variable resistor and thermistor to demonstrate the JEITA compliance.

Applications

  • Mobile Point-of-Sale (mPOS) Terminals
  • Portable Medical Devices
  • Wireless Headphones
  • GPS Trackers
  • Charging Cradles for Wearable Devices
  • Power Banks
  • Mobile Routers
MAX77787JEVKIT
Evaluation Kit for the MAX77787
MAX77787HEVKIT, MAX77787JEVKIT: Board Photo
MAX77787HEVKIT
Evaluation Kit for the MAX77787
MAX77787HEVKIT, MAX77787JEVKIT: Board Photo

Latest Discussions

1 Years Ago
Question for MAX77787's VSET(termination voltage) setting
1 Years Ago
STBY PIN
1 Years Ago
Qutstion for MAX77787's JEITA Compliance
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