4
Rev. 0
HARDWARE SETUP
V
IN(UVLO
+
)
=
1.242V •(R1
+
R2)
R2
+
2.5µA •R1
V
IN(UVLO
−
)
=
1.228V •(R1
+
R2)
R2
R1 = 430e3; R2 = 270e3; UVLOP = 1.242 • (R1 + R2)/R2 + 2.5E-06 • R1;
UVLON = 1.228 • (R1 + R2)/R2; UVLON, UVLOP (3.18, 4.30)
Figure 1. Undervoltage Lockout Calculation for LT8301 According to the Schematic of DC2732A
The DC2732A can be setup for different applications.
The power supply and communication interface can be
a nonisolated connection via J4 or the individual turrets
IOV
CC
, MISO, MOSI, SCK, CS, ADV
CC
, GND. An isolated
connection is possible using the onboard flyback con-
verter LT8301 sourced by V
CC
, LGND and using the isoSPI
communication via J1, J2 or iso+, iso– test points. If not
needed, the onboard power supply can be left unpowered,
or be disabled by connecting the enable signal to LGND
(put jumper JP9 to DIS). If not using the onboard power
supply, any external (also isolated) power supply can be
connected to ADV
CC
and GND (e.g., Analog Devices inte-
grated isolated DC-to-DC converters – isoPower).
The communication mode (SPI or isoSPI) must be set
using jumpers JP3–JP6. In case J4 is directly connected
to a Linduino
®
, it provides 7V and JP3–JP6 must be set
to SPI operation.
The Hardware Description section gives more details
about different hardware setup options. In most cases,
the DC2732A is operated together with a DC2026, which
is referred to as a Linduino.
