MAX77751

PRODUCTION

3.15A USB Type-C Autonomous Charger for 1-Cell Li+ Batteries

Industry's First Autonomous Charger with Integrated USB Type-C Detection

Data Sheet (Rev. 4)

Product Selection Table

Part Models: 16
1ku List Price: Starting From $1.49

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Overview

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
- CC Detection for USB Type-C
- BC1.2 Detection for Legacy SDP, DCP, and CDP
- Automatic Input Current Limit Configuration
- Input Voltage Regulation with Adaptive Input Current Limit (AICL)
Reverse Boost Capability up to 5.1V, 1.5A
Pin Control of All Functions
- Resistor-Configurable Fast-Charge Current
- Resistor-Configurable Top-Off Current
- ENBST Pin to Enable and Disable Reverse Boost
- STAT Pin to Indicate Charging Status
- INOKB Pin to Indicate Input Power-OK (POK)
- ITOPOFF Pin to Disable Charge
Integrated Battery True-Disconnect FET
3mm x 3mm, 24 Lead FC2QFN Package

The MAX77751 is a standalone, 3.15A charger with integrated USB Type-C^® CC detection and reverse boost capability. The fast-charge current and top-off current thresholds are easily configured with resistors. The MAX77751 operates with an input voltage of 4.5V to 13.7V 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 MAX77751 enable automatic USB Type-C power source detection and input current limit configuration. To support a variety of legacy USB as well as proprietary adapters, the IC also integrates BC1.2 detection using the D+ and D- pins. The IC runs the CC detection and BC1.2 detection automatically without any software as soon as the USB plug is inserted.

The IC also offers Reverse-Boost capability up to 5.1V, 1.5A, which can be enabled with the ENBST pin. The STAT pin indicates charging status, while the INOKB pin indicates valid input voltage. Charging can be stopped by pulling the ITOPOFF pin low.

The MAX77751 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 MAX77751 is offered in several variants to support Li-ion batteries with various termination voltages from 4.1V to 4.5V. The IC comes in a 3mm x 3mm, 0.4mm pitch 24-lead FC2QFN package 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

Part Models: 16
1ku List Price: Starting From $1.49

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX77751AEFG+	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751AEFG+T	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751BEFG+	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751BEFG+T	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751CEFG+	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751CEFG+T	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751DEFG+	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751DEFG+T	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751FEFG+	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751FEFG+T	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751GEFG+	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751GEFG+T	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751HEFG+	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751HEFG+T	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751JEFG+	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77751JEFG+T	24-LFCSP-3X3X0.55	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Charger ICs 4
MAX77860	PRODUCTION	USB Type-C, 3A Switch-Mode Buck Charger with Integrated CC Detection, Reverse Boost, and ADC
MAX77840	PRODUCTION	3A Buck Charger with ModelGauge m5 Fuel Gauge and USB BC1.2 Detection
MAX77818	PRODUCTION	Dual Input, Power Path, 3A Switching Mode Charger with Fuel Gauge
MAX8903		2A 1-Cell Li+ DC-DC Charger for USB and Adapter Power

Parts	Product Life Cycle	Description
MAX77757	RECOMMENDED FOR NEW DESIGNS	3.15A USB Type-C Autonomous Charger with JEITA for 1-Cell Li-ion/LiFePO4 Batteries
MAX77860	PRODUCTION	USB Type-C, 3A Switch-Mode Buck Charger with Integrated CC Detection, Reverse Boost, and ADC

Evaluation Kits

Evaluation Kit for the MAX77751

Buy Now View Details

Features and Benefits

Up to 16V Protection
14V 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)
Reverse-Boost Capability up to 5.1V, 1.5A
Pin Control of All Functions
- Resistor-Configurable Fast-Charge Current
- Resistor-Configurable Top-off Current
- ENBST Pin to Enable and Disable Reverse Boost
- STAT Pin to Indicate Charging Status
- INOKB Pin to Indicate Input Power-OK (POK)
- ITOPOFF Pin to Disable Charge
Integrated Power Path
Integrated Battery True-Disconnect FET
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX77751 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77751, the standalone 3.15A USB Type-C^® autonomous charger.

The EV kit is a switch-mode charger and Smart Power Selector™ with autonomous configuration. The MAX77751 can operate from 4.5V to 14V input, with the fast-charge current up to 3.15A and maximum input current limit of 3A.

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 MAX77751 has the reverse-boost capability, which is enabled by the ENBST pin to allow the 5.1V/1.5A output to CHGIN.

Applications

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

Resources

MAX77751FEVKIT ODB Files - Design Files
6/8/2023

Evaluation Kit for the MAX77751

Buy Now View Details

Features and Benefits

Up to 16V Protection
14V 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)
Reverse-Boost Capability up to 5.1V, 1.5A
Pin Control of All Functions
- Resistor-Configurable Fast-Charge Current
- Resistor-Configurable Top-off Current
- ENBST Pin to Enable and Disable Reverse Boost
- STAT Pin to Indicate Charging Status
- INOKB Pin to Indicate Input Power-OK (POK)
- ITOPOFF Pin to Disable Charge
Integrated Power Path
Integrated Battery True-Disconnect FET
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX77751 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77751, the standalone 3.15A USB Type-C^® autonomous charger.

The MAX77751 has the reverse-boost capability, which is enabled by the ENBST pin to allow the 5.1V/1.5A output to CHGIN.

Applications