Quick Start Procedure - Linear Technology DC1822A Demo Manual

DEMO MANUAL DC1822A

Quick start proceDure

Demonstration circuit 1822A is easy to set up to evaluate
the performance of the LTC3861EUHE. Please refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below.
1. With power off, connect the input supply, load and
meters, as shown in Figure 1. Preset the load to 0A
and V supply to be 0V. Place jumpers in the following
IN
positions:
JP1 RUN1 ON
JP2 RUN2 ON
JP3 INT BIAS ON
2. Adjust the input voltage to be between 7V to 14V.
VOUT1 should be 1.5V ±2%.VOUT2 should be 1.2V ± 2%.
+
V
V
OUT1
*
–
2
3. Next, apply 25A load to each output and re-measure
4. Once the DC regulation is confirmed, observe the output
NOTE 1. Use the BNC connectors labeled VOUT1 or
VOUT2 to measure the output voltage ripple.
NOTE 2. Do not apply the load from the VOS1+ turret to
the VOS1– turret or from the VOS2+ turret to the VOS2–
turret. These are connected to the sense traces for the
output voltage. Heavy load currents applied across these
turrets may damage these traces.
– +
V
OUT1
LOAD
A
I I
OUT1 OUT2
A
I
IN
+ –
V SUPPLY
IN
Figure 1. Proper Measurement Equipment Setup
VOUT.
voltage ripple, load step response, efficiency and other
parameters.
+ –
V
OUT2
LOAD
A
dc1822a F01
Monitor voltage across C
OUT5
and C for accurate
OUT10
efficiency measurements.
+
V
V
OUT2
*
–
+
V
V
IN
–
dc1822af