Kontron SMARC Evaluation Carrier - Manual (Page 34)

User’s Guide
34 www.kontron.com
7.12 Jumper J27 – Step-Down Switcher Disable
J27 is used to enable or disable and bypass the step-down switcher in the Battery Charger subsystem. Refer to Figure 2
Input Power Path Block Diagram for an illustration.
For single level battery cells (3.6V nominal battery voltage), the switcher should be disabled. For two level and three
level cells, the switcher should be enabled.
Jumper Position Function
J27
Inserted Disables step-down switcher in Battery Charger system.
Not inserted Switcher enabled
7.13 Jumper J26 LED Power Source
The LED power source can be disconnected by removing jumper J26. This can be important when trying to minimize
power. The combined power consumption of all the LEDs, if they are all on, can be over 0.5W.
Jumper Position Function
J34
Inserted LEDs are powered
Not inserted LED power is cut off