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dc2019bfb

DEMO MANUAL DC2019B

QUICK START PROCEDURE

Demonstration circuit 2019B is easy to set up to evalu-

ate the performance of the LT8614. Refer to Figure 4 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

scope technique.

1. Place JP1 on GND position.

andGND.IftheEMI/EMCperformanceisnotimportant,

the input EMI filter can be bypassed by connecting the

4. Turn on the power at the input.

NOTE: Make sure that the input voltage does not

exceed 42V.

NOTE: If there is no output, temporarily disconnect the

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

is shorted.

6. Once the proper output voltage is established, adjust

the load within the operating ranges and observe the

output voltage regulation, ripple voltage, efficiency and

other parameters.

7. An external clock can be added to the SYNC termi-

nal when SYNC function is used (JP1 on the SYNC

position). Please ensure that the chosen RT sets the

LT8614 switching frequency to equal or below the

lowest SYNC frequency. See the data sheet section,

“Synchronization.”

Figure 4. Proper Measurement Equipment Setup

Figure 5. Measuring Output Ripple