MFJ MFJ-4418, Инструкция по эксплуатации

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s. Peak Current Display : This value is the peak current seen during the supply
operation. This value is volatile and will be zeroed when the power supply input
voltage is removed or the “Reset” button in pressed.
t. Average Current Display : This value is the average current delivery by the
supply. This value is volatile and will be zeroed when the power supply input
voltage is removed or the “Reset” button in pressed.
u. Reset Button : This button clears the “Peak Current Display” and “Average
Current Display”. It does not reset any other functions.
THEORY OF OPERATION
Figure 10 Block Diagram
Input Filtering: The input filter consists of C13 which provides EMI filtering followed by L1,
C12 and C11 which are a low pass filter at the alternator which range. C8, C9 and C10 provide
low ESR energy storage which helps to suppress input noise while providing energy during input
low voltage transient periods. Diode D1 and capacitors C3 and C4 provide additional filtering
and energy storage feeding the SMPS controller IC1. The additional energy storage is isolated
from any transient load causing a voltage drop on the input protecting IC1 from resets and gaps