QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1317A-F
ACTIVE RESET ISOLATED 9-36V INPUT TO 3.3V @20A DC/DC POWER CONVERTER
2
QUICK START PROCEDURE
Demonstration circuit 1317 is easy to set up to evalu-
ate the performance of LT1952-1 circuit.
Refer to Fig-
ure 1 for proper measurement equipment setup
and
follow the procedure below:
NOTE:
When measuring the input or output voltage
ripple, care must be taken to avoid a long ground lead
on the oscilloscope probe. Measure the input or out-
put voltage ripple by touching the probe tip directly
across the Vin or Vout and GND terminals. See Figure
2. for proper scope probe technique.
1.
With power off, connect the input power supply to
Vin and GND. Make sure that the input power sup-
ply has sufficient current rating at minimum input
voltage for the required output load.
2.
Turn on the power at the input.
NOTE:
Make sure that the input voltage does not
exceed 36V.
3.
Check for the proper output voltage.
Vout = 3.3V.
If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
4.
Once the proper output voltage is established, ad-
just the load within the operating range and ob-
serve the output voltage regulation, ripple voltage,
efficiency and other parameters.
5.
The DC1317 is equipped with an output capacitor
CSYS (470uF) that approximates typical system
rail capacitance. If system board already has ca-
pacitance of similar value CSYS can be removed.
Figure 1. Proper Measurement Equipment Setup