Quick Start Procedure - Linear Technology DC2548A Demo Manual

Quick start proceDure

Demonstration circuit 2548A is easy to set up to evalu-
ate the performance of the LT8672. Refer to Figure 2 for
proper measurement equipment setup and follow the
procedure below:
1. Place JP1 on V
2. Connect the input power supply to V
3. Connect a load from V
4. Turn on the power at the input.
5. Check for the proper output voltages (V
The demo board provides test points TP1 and TP3 to
accurately measure the voltage across the external
MOSFET.
+
+
POWER
SUPPLY
–
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or V position.
OUT IN
and GND.
IN
to GND.
OUT
= V
OUT
I
IN
–
+
V
IN
–
Figure 2. Proper Measurement Equipment Setup
DEMO MANUAL DC2548A
NOTE. If there is no output, temporarily disconnect the
load to make sure that the load is not shorted.
6. Once the proper output voltage is established, adjust
the load within the operating ranges and observe the
output voltage.
7. To use the PG pin, connect a power source at VEXT
that is not higher than 5V.
8. Test point TP5 allows easy access to the voltage at
the AUX pin. The gate-source voltage can be observed
– 2 0mV).
between TP2 and TP4.
IN
I
OUT
+
–
+
+
V
LOAD
OUT
–
–
DC2548 F02
dc2548af
3