Evaluates: MAX77757

MAX77757 Evaluation Kit

General Description

The MAX77757 evaluation kit (EV kit) is a fully assembled

and tested printed circuit board (PCB) that demonstrates

autonomous charger with JEITA.

The MAX77757 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 MAX77757 is offered in

several variants to support Li-ion batteries with various

termination voltages from 4.1V to 4.5V. It also has a 3.6V

termination voltage option for LiFePO4 batteries.

The EV kit features USB Type-C CC detection, bat-

tery charging compliant with the USB Battery Charging

Specification Revision 1.2 (BC1.2), proprietary adapter

detection upon input insertion, and automatic configura-

tion of the charger input current limit to the maximum

allowable current from the input source.

The MAX77757 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.

Benefits and Features

● 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)

● Reverse-Boost Capability up to 5.1V, 1.5A

● Termination Voltage

• 4.1V to 4.5V for Li-ion and Li-poly Batteries

• 3.6V/3.7V for LiFePO4 Battery

● Safety

• Charge Safety Timer

• JEITA Compliance with NTC Thermistor

(MAX77757J)

• HOT/COLD Stop Charging with NTC Thermistor

(MAX77757H)

• Thermal Shutdown

● Pin Control of All Functions

• Resistor-Configurable Fast-Charge Current

• ENBST Pin to Enable and Disable Reverse Boost

• STAT Pin to Indicate Charging Status

• INOKB Pin to Indicate Input Power-OK (POK)

• THM Pin to Disable Charge

● Integrated Power Path

● Integrated Battery True-Disconnect FET

● Proven PCB Layout

● Fully Assembled and Tested

319-100689; Rev 1; 3/21

Ordering Information appears at end of data sheet.

USB Type-C and USB-C are registered trademarks of USB Implementers Forum.

Smart Power Selector is a trademark of Maxim Integrated Products, Inc.

Figure 1. MAX77757 EV Kit

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