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dc2479aaf

DEMO MANUAL DC2479A-A

QUICK START PROCEDURE

Demonstration circuit DC2479A-A is easy to set up to

evaluate the performance of the LTM4650EY. Please refer

to Figure 1 for proper measurement setup and follow the

procedure below:

1. With power off, connect the input power supply, load

and meters as shown in Figure 2. Preset the load to 0A

2. Turn on the power supply at the input. The output volt-

age should be 1.0V ± 1.5% (0.985V~1.015V).

3. Oncetheproperoutputvoltageisestablished,adjustthe

load within the operating range and observe the output

voltage regulation, output voltage ripple, efficiency and

other parameters. Output ripple can be measured at J6

with BNC cables.

4. (Optional) For optional load transient test, apply an

adjustable pulse signal between “IOSTEP CLK” and

“GND” test point. Pulse amplitude (3V~3.5V) sets the

loadstepcurrentamplitude.Theoutputtransientcurrent

can be monitored at the BNC connector J5 (10mV/A).

The pulse signal should have very small duty cycle

(< 10%) to limit the thermal stress on the transient

load circuit.

PARAMETER

CONDITIONS/NOTES

VALUE

Input Voltage Range

4.5V ~ 15V

1.0V ± 1.5% (0.985V ~ 1.015V)

Maximum Continuous Output Current

See Data Sheet for Detail.

50A

Default Operating Frequency

500kHz

Efficiency

86.6%, See Figure 4

Load Transient