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Evaluates: MAX77757

MAX77757 Evaluation Kit

BC1.2 and CC Detection Test Setup

1) Connect the battery/battery simulator/power supply

with electronic load between BATT and GND. See

the Battery Charger Test Setup section for details.

2) Plug in the USB Type-C cable from the PC or AC

adaptor.

3) Check if the MAX77757 configures the input current

limit correctly.

Reverse Boost Test Setup

1) Connect the power supply between BATT and GND,

adjust the voltage to 3.8V with 3.5A current limit, and

turn it on.

2) Apply the Jumper 4 to enable the reverse-boost mode.

3) Monitor the voltage of CHGIN and see whether it

equals 5.1V.

LED Indicator

1) Two LED indicators are installed on the EV kit: DS1

(Green) is for the STAT pin and DS2 (Red) is for

INOKB.

2) The STAT pin is an open-drain and active-low output

that indicates charge status. See Table 2 for details.

3) INOKB is an open-drain and active-low output that

indicates the input status. If a valid input source is in-

serted and the buck converter starts switching, INOKB

pulls low. When the reverse boost is enabled, INOKB

pulls low to indicate the 5V output from CHGIN.

Table 2. STAT Output with Charging Status

Note: Indicate that you are using the MAX77757 when contacting these component suppliers.

#Denotes RoHS compliant.

CHARGING STATUS

STAT

LOGIC STATE

CHARGE STATUS LED

No Input

High Impedance

High

OFF

Trickle, Precharge,

Fast Charge

Repeat Low and High

Impedance with 1Hz,

50% duty cycle

After an external diode and a

capacitor rectifier, High

Blinking with 1Hz,

50% duty cycle

Top-Off and Done

Low

Low

Solid ON

Faults

High Impedance

High

OFF

SUPPLIER

PHONE

WEBSITE

MURATA

770-436-1300

www.murata-northamerica.com

SAMTEC

800-726-8329

www.samtec.com

TAIYO-YUDEN

603-669-7587

www.t-yuden.com

TDK

847-803-6100

www.comopnent.tdk.com

VISHAY

408-970-5852

www.vishay.com

CYNTEC

510-668-5167

www.cyntec.com

PANASONIC

800-344-2112

www.panasonic.com

PART NUMBER

IC

TYPE

THERMAL PROTECTION

TERMINATION VOLTAGE (V)

MAX77757JEVKIT435#

MAX77757JEFG435+

EV KIT

JEITA

4.35

MAX77757JEVKIT420#

MAX77757JEFG420+

EV KIT

JEITA

4.2

MAX77757HEVKIT360#

MAX77757HEFG360+

EV KIT

HOT/COLD STOP

3.6

Component Suppliers

Ordering Information