MAX77950 datasheet(2/16 Pages) MAXIM

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Evaluates: MAX77950

MAX77950 Evaluation Kit

Procedures

The EV kit is fully assembled and tested. The following

steps are used to verify board operation.

Install the EV Kit GUI

The EV kit GUI allows the user to communicate with the

EV kit. The GUI connects to the EV kit through an I2C and

USB interface to monitor and control the IC by changing

the register-related functions such as FOD coefficient,

VRECT target for WPC/PMA, and LDO output voltage.

1) Visit

www.maximintegrated.com/evkitsoftware to

download the latest version of the EV kit software,

MAX77950_EVKIT_GUI_1.70207.0D-x86.zip. Save

the EV kit software to a temporary folder and uncom-

press the file.

2) Unzip and run the execution file and follow the in-

structions to finish the installation.

Startup

3) Ensure that the EV kit has the desired jumper set-

tings, as shown in Table 1.

4) Connect to a PC using the Micro-USB cable (see the

MAX77950 EV Kit Photo).

5) Turn on the WPC/PMA transmitter to provide power

to the EV kit.

6) Place the EV kit on the transmitter and align properly.

7) Check that the power-good indicator LED (DS1)

is on.

8) Launch the EV kit GUI. Press

Connect under the De-

vice menu to initiate the link with the EV kit as shown

in Figure 1.

PeerPower

FollowthestepsbelowtooperatetheEVkitinPeerPowerTM

mode:

9) Disconnect all power supplies from the EV kit.

10) Make a jumper connection on P2P_EN (J2) to VIO

pins (1-2) to enable PeerPower mode.

11) Set J101 to pins 1-2 if an external voltage source is

used to supply 1.8V to VIO; otherwise, set to pins 2-3

to use the on-board 1.8V.

12) Preset a DC power supply to 5V (if you choose to use

an external source to VIO, preset the other DC power

supply to 1.8V).

13) Connect the 5V DC power supply to VOUT and 1.8V

to E_VIO (see the MAX77950 EV Kit Photo)

14) Turn on the power supply.

15) The EV kit is now ready to operate as a transmitter.

*For VIO to use on-board 1.8V from LDO (U103), connect

to a 5V source through the Micro-USB cable (J4).

PeerPower is a trademark of Maxim Integrated Products, Inc.

Table 1. Default Jumper Settings

*Default position.

JUMPER

NODE OR FUNCTION

SHUNT POSITION

FUNCTION

WP_EN

1-2

The device is disabled.

2-3*

The device is enabled.

P2P_EN

1-2

Connecting P2P_EN to VIO.

2-3

Not in use.

OPEN*

PeerPower is disabled.

WP_DET

1-2*

Connect WP_DET to LED.

J101

VIO

1-2

An external source (1.8V) supplies VIO.

2-3*

On-board 1.8V LDO (U103) supplies VIO.

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