2
Rev. 0
DESCRIPTION
Figure 2 shows the efficiency of the DC2688A at 12V and
24V input in pulse-skipping mode of operation (input from
V
IN
turret pin, and R
SENSE
resistor is 8mΩ)
The DC2688A has an input EMI filter installed. The EMI
performance of the demo board DC2688A-A (with EMI
filter) is shown in Figure 3 and Figure 4. The red lines in
Figure 3 are CISPR 25 class 5 limits for peak detector. The
EMI performance of DC2688A-B (with EMI filter) is shown
in Figure 5 and Figure 6. To achieve EMI performance as
shown in Figure 3 through Figure 6, the input EMI filter
is required, and the input voltage should be applied at
V
EMI
terminal.
As shown in the dashed box in Figure 1 functional block
diagram, the DC2688A demo board may also be optionally
used in conjunction with the Linduino
®
microcontroller
board
and a touchscreen display shield. The
DC2688A demo board includes the
an 8-channel ADC/GPIO with on-chip reference and I
2
C
interface. The AD5593R monitors several inputs from the
LT8698S/LT8698S-1, communicates with the Linduino
board through the I
2
C interface, and controls the SEL1,
SEL2, and SEL3 tristate input pins.
The LT8698S/LT8698S-1 data sheet gives a complete
description of the part, operation and application infor-
mation. The data sheet must be read in conjunction with
this manual for DC2688A.
