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dc2453afb

DEMO MANUAL DC2453A

Quick start proceDure

Demonstration circuit 2453A is an easy way to evaluate the

performance of the LTM4643EV. Please refer to Figure 1

for test setup connections and follow the procedure below.

1. With power off, place the jumpers in the following

positions:

JP1

JP2

JP3

JP2

RUN1

RUN2

RUN3

RUN4

ON

ON

ON

ON

JP8

JP7

JP6

JP5

MODE1

MODE2

MODE3

MODE4

CCM

CCM

CCM

CCM

2. Beforeconnectinginputsupply,loadsandmeters,preset

the input voltage supply to be between 4V to 20V. Preset

the load currents to 0A.

3. With power off, connect the loads, input voltage supply

and meters as shown in Figure 1.

4. Turn on input power supply. The output voltage meters

for each phase should display the programmed output

voltage ±2%.

5. Once the proper output voltage is established, adjust the

load currents for each phase within the 0A to 3A range

and observe the load regulation, efficiency, and other

parameters. Output voltage ripple should be measured

at J6 with a BNC cable and oscilloscope.

6. To observe increased light load efficiency place, a Mode

pin jumper (JP5-JP8) in the DCM Mode position.

performance summary

PARAMETER

CONDITIONS/NOTES

VALUE

Input Voltage Range

4V – 20V

Jumper Selectable

Maximum Continuous Output Current per Phase

Derating is Necessary for Certain Operating

Conditions. See Data Sheet for Details

3ADC

Default Operating Frequency

1.2MHz

Efficiency

89% See Figure 2