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Evaluate: MAX20094/MAX20095

MAX20094/MAX20095 Evaluation Kits/

MAX20094/MAX20095 Evaluation Systems

Detailed Description Software

The GUI shown in Figure 1 is the main window of

MAX20094 EV kit software, and provides a convenient

means to control both the MAX20094 and MAX20095

ICs. When the software is first opened, a splash screen

appears. Click anywhere on the screen to proceed to the

main window. Verify that the bottom-right corner of the

status bar displays

EV Kit: Connected. If there is a prob-

lem with the connection, reconnect the EV kit to the PC,

power it up, and then click

Device > Connect, or press

F9 on the keyboard. Refer to the MAX20094/MAX20095

IC data sheet for a full description of each register and

their bits.

CC/CV Charging Details

The normal operating mode of the IC is to maintain

charge on the backup battery of a system. Several key

aspects of the charging function can be easily tested

through the GUI.

Switching Between Charging Modes

When the charger is enabled, the operation is governed

by an internal state machine.

Disabled: The charger is in an OFF state if the CHG_EN

bit (register 0x04) = 0, or if the die temperature is above

thermal-shutdown threshold.

Prequal: The prequalify state is a current-limited mode

that occurs if BBAT+ voltage is less than an internal OTP

threshold. To enter this mode, set BBAT+ to 0V before

enabling the charger.

Standby: Once the charger is enabled, it remains in this

state until a valid supply condition is met. To verify on EV

kit, enable the charger and then enter SUP1 undervoltage

CC: The continuous-current mode is used when the

rechargeable battery needs a significant amount of charge.

To enter this mode, follow the quick start Procedure for

CC/CV Charging section.

Figure 1. MAX20094 Evaluation Kit Software Main Window (also applies to the MAX20095 EV Kit)