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dc1469bf
DEMO MANUAL DC1469B
Quick start proceDure
Demonstration circuit 1469B is easy to set up to evalu-
ate the performance of the LTC6801. Refer to Figure 1
for proper measurement equipment setup and follow the
procedure below:
1. Place jumpers in the following positions:
JP1 to JP5 GND position (horizontally)
JP6, JP7 VREG position (horizontally)
JP8 GND position (horizontally)
JP9 Both shunts in LOOP position (horizontally)
JP10 SE position
JP11 ON position
JP12 Both shunts in ON position (vertically)
2. J1 is a two-piece connector. The removable section
has the screw-clamp array, and may have been shipped
either mated, loose, or parked on the pass-through
fingers at the right edge of the board. This connector
allows for quick assembly of a wire harness to a cell
array (or cell array simulator). If such harnessing or
cell simulator has already been set up to work with
other Linear battery monitor demo circuits (DC1393B
for example), the movable part may be clamped to the
DC1469B battery pass-through fingers to form a simple
extender assembly. The harness connects to taps in
the cell array, supporting 4 to 12 cells of monitoring.
For cell counts less than 12, the topmost contact must
share a connection with the uppermost cell potential
of the group to properly power the LTC6801, and JP6
and JP7 reconfigured accordingly.
3. Turn on the power at the cell simulator, and adjust to
about 3V per cell (i.e. 36V for 12 cells).
NOTE: Make sure that the total input potential does not
exceed 60V. Individual cell potentials must not exceed
6V or protective Zener diodes will conduct.
4. The LED should illuminate, indicating that the monitor
is detecting nominal operating conditions. SOUT will
be a square wave like that furnished to EIN (SOUT/ is
the complement of SOUT).
5. Vary the cell simulator supply to see the alarm condi-
tion occur (LED dark and SOUT low). For the settings
given, thresholds are at about 9V and 45V for the total
12-cell potential. Refer to the data sheet and schematic
diagram (see Figure 2) for specific configurations of
other thresholds and parameters that may be of interest.
6. If multiple DC1469B assemblies are being evaluated,
they may be cascaded by attaching a ribbon from J3
to the J2 of another board. Board(s) with a ribbon at-
tached to J3 must have JP9 jumpers relocated to the
LINK position (horizontally). Board(s) with a ribbon
attached to J2 must have JP10 set to DIFF and JP12
jumpers in the OFF position (vertically) or removed.
7. To demonstrate standby power conditions, place both
JP12 jumpers to the OFF position (vertically) to inhibit
the enable clock. Supply current can be calculated
by the voltage drop on R13 (100Ω). Supply current
is somewhat dependant on the jumper configuration
strapping.
