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Evaluates: MAX77650/MAX77651

MAX77650/MAX77651 Evaluation Kit

Quick Start

Follow this procedure to familiarize yourself with the EV kit.

Note: In the following sections, software-related items are

identified by bolding. Text in

bold refers to items directly

from the EV kit software. Text in

bold and underlined

refers to items from the Windows operating system.

Required Equipment

● MAX77650/MAX77651 EV kit

● Windows-based PC

● Power supply

● Ammeter

● DVM

● Micro-USB cable

● GUI

Procedure

1) Install the GUI software. Visit the product webpage

www.maximintegrated.com/max77650evkit and

navigate to Design Resources to download the lat-

est version of the EV kit software. Save the EV kit

software to a temporary folder and decompress the

ZIP file.

2) Install EV kit shunts per Table 1.

3) Connect a Micro-B USB cable between the EV kit’s J6

and your Windows-based PC. Note that a USB cable

should always be plugged in during evaluation.

4) Apply a 3.7V supply (set for 100mA current limit)

through an ammeter (set for 10mA range) across the

VBATT and GND2 terminals of the EVKIT. Turn the

supply on.

5) Open the GUI and press the

Connect button in the

upper-left corner. Wait for the device to respond, and

in the

Synchronize window, press the Read and

close button.

6) Press the

on-key (SW1) for approximately 1 second,

then release the on-key.

7) On the

AMUX/ADC tab of the GUI, click the Read

buttons next to VSBB0, VSBB1, VSBB2, and VLDO.

For the MAX77650A, 2.05V, 1.2V, 3.3V, and 1.85V,

respectively, appear (Figure 6). For the MAX77651B,

1.9V, 3.2V, 0V, and 0V, respectively, appear.

8) Confirm with the ammeter that the quiescent current is

approximately 40µA. Then, in the

Global Resources

tab on the GUI, set the Main Bias Low Power Mode bit

to ‘1’ and click the

Write button. Now, confirm that the

quiescent current is approximately 6µA.

Note that the MAX77651 will have an extra 3µA

current when J203 and J205 are installed. See the

MAX77650/MAX77651 EV Kit Differences section for

more information.

This concludes the Quick Start procedure. Users are now

encouraged to explore the device and its register settings

with the GUI. For guidance on configuring the charger and

the LED’s, see the Charger Quick Start and LED Quick

Start sections. During general device evaluation, set the

ammeter range to greater than or equal to 1A to minimize

the impact of its series resistance.

For more information on the GUI, see the Software section.

Figure 6. Quick Start: Regulator Check with the ADC

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