Quick Start Procedure - Linear Technology DC1819A Demo Manual

DEMO MANUAL DC1819A

QUICK START PROCEDURE

Demonstration circuit 1819A is easy to set up to evaluate
the performance of the LTC4415. Refer to Figure 1 for
proper measurement equipment setup and follow the
procedure below.
1. Set the jumpers as below:
JP1
BOTH
2. With all power off, connect input 1 and 2 (VIN1 and
VIN2) power supplies capable of at least 4A each, the
loads (VOUT1 and VOUT2), and meters as shown in
Figure 1.
3. Preset the system loads to 0A and the input supplies
to 0V, 0A current limit.
4. Turn on the supplies, setting the current limit above 4A.
Adjust the voltages to the desired value, up to 5.5V.
5. Turn on the loads and adjust as necessary.
6. Monitor CLIM1 and CLIM2 pin voltages for a scaled
representation of the output currents.
7. Adjust the supply voltages further and observe how the
output states change accordingly. STAT1 and STAT2 will
change state if the input voltage drops below the UVLO
threshold.
8. Adjust the loads into current limit and observe how the
WARN1 and WARN2 states change accordingly.
2
JP2 JP3
4A 4A
Optional
1. For prioritization enable switchover set jumper JP1 to
PRIORITY.
2. For independent, external control of the enable pins,
remove the shunt on jumper JP1. Apply the logic control
signal on EN1 and EN2 as necessary.
3. With all power off, change the CLIM1 and CLIM2 settings
on jumpers JP2 and JP3 for different current limits.
4. For load sharing or evaluation of the diode-OR func-
tion, connect the two diode outputs, OUT1 and OUT2,
together. The source of highest voltage will appear at
the output.
5. For independent path control from a common input,
connect the two diode inputs, IN1 and IN2, together.
dc1819afa