Chapter 8 Accessory
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8.3 LKA103 LK220 Capacitance Power Box
Module
LKA103 provides the backup battery for RTC of the LK220 module.
When LK220 is powered off, LKA103 supplies power to RTC via Springs A and C to keep RTC in the
standby mode. The max. voltage for capacitance charging is 5.0V and the capacity is 0.94F. It can
keep RTC in the standby mode for about 7 days when fully charged once.
Figure 8-9 LKA103 Capacitance Power Box Schematic Diagram
8.3.1 Appearance
Figure 8-10 LKA103 Module Schematic Diagram
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