Open-Q™ 624A Development Kit
Open-Q™ 624A Development Kit User Kit
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3.8.3 Power Input
The Open-Q™ development kit power source connects to the 12V DC power supply jack J21. Current Rating
for this port is 3A. Starting from the power jack, the 12V power supply branches off into different voltage rails
via step down converters on the carrier board and PMIC on the SOM. The SOM is powered by 3.9V via TI
step down converter U400 on the carrier board or a single cell Li-on battery. To ensure the SOM is getting
powered correctly, a user can monitor the current going into the SOM via the power probe header J86 (see
section 3.8.7 below).
Figure 5 J21 12V DC Power Jack
The SOM includes 2 PMIC modules. Functionalities of the 2 modules are outlined below.
PMI8952 PMIC is used for:
•
Sourcing various regulated power rails
•
LCD Backlight / Bias Voltage Sourcing
•
Battery charging
PM8953 PMIC is used for:
•
Source various regulated power rails
•
Source system clock
