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dc2641af

DEMO MANUAL DC2641A

QUICK START PROCEDURE

Demonstration circuit DC2641A is easy to set up to

evaluate the performance of the LTC7801EUFD. Refer to

Figure 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 output voltage

capacitor. See Figure 2 for proper scope probe technique.

1. Place jumpers in the following positions:

JP1 ON

JP4 FCM

JP5 ON

JP8 OFF

and GND.

3. Turn on the power at the input.

NOTE: Make sure that the input voltage is higher than

16V and does not exceed 100V.

4. Check the output voltage. The output voltage should

be between 11.76V and 12.24V.

Once the proper output voltage is established, adjust

the load within the operating range and observe the

output voltage regulation, output voltage ripple, effi-

ciency and other parameters.

NOTE: If there is no output, temporarily disconnect the

load to make sure that the load is not set too high.