User Guide
MP2663 Evaluation Kit (EVKT-MP2663)
MP2663 Evaluation Kit User Guide rev 1.0
MonolithicPower.com
10
3/13/2019
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3.5 Troubleshooting Tips
EVKT-USBI2C-02 Driver Problem
If the USBI2C-02 driver is not properly installed, manual installation is required. Follow the steps below.
1.
Install the correct “.exe” file according to the windows operation system.
32-bit: \EVKT-USBI2C-02 USB Driver\USBXpressInstaller_x86.exe.
64-bit: \EVKT-USBI2C-02 USB Driver\USBXpressInstaller_x64.exe.
2. Connect the communication interface to the PC with a USB cable.
3. Find the
“USBXpress Device” in the Device Manager.
If the PC is running Windows10, check the driver version of USBXpress Device. Windows 10 will
automatically install the older USB driver, which is not compatible. The correct driver version is 4.0.0.0
(see Figure 12).
Figure 12: Correct Driver Version is 4.0.0.0
No Supply
The IC’s input pin has an under-voltage lockout (UVLO) detection circuit. If the input voltage (VIN) is
lower than the UVLO rising threshold, the charging function is disabled.
No Charging Event
If the IC detects that the input voltage is lower than the UVLO falling threshold (it enters a no supply state)
or over-temperature protection is triggered (it enters a shutdown state), the IC switches to supplement
mode powered by the battery.
Thermal Recovery
If the MP2663 is in a shutdown state due to the die temperature exceeding the thermal protection
threshold, the IC enters a power-
on sequence when the die’s temperature decreases.