Performance Summary; Quick Start Procedure - Linear Technology DC2479A-B Demo Manual

DEMO MANUAL DC2479A-B

PERFORMANCE SUMMARY

PARAMETER
Input Voltage Range
Output Voltage V
OUT
Maximum Continuous Output Current
Default Operating Frequency
Efficiency
Load Transient

QUICK START PROCEDURE

Demonstration circuit DC2479A-B is easy to set up to
evaluate the performance of the LTM4650EY-1. 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
and V supply to 12V.
IN
2. Turn on the power supply at the input. The output volt-
age should be 1.0V ± 1.5% (0.985V~1.015V).
3. Once the proper output voltage is established, adjust the
load within the operating range and observe the output
2
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Specifications are at T
CONDITIONS/NOTES
V = 4.5~15V, I = 0~50A
IN OUT
De-Rating is Necessary for Certain V
See Data Sheet for Detail.
V = 12V, V = 1.0V, I = 50A, f
IN OUT OUT
V = 12V, V = 1.0V, I = 25A to 37.5A
IN OUT STEP
= 25°C
A
, V and Thermal Conditions,
IN OUT
= 500 kHz
SW
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
load step current amplitude. The output transient current
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.
VALUE
4.5V ~ 15V
1.0V ± 1.5% (0.985V ~ 1.015V)
50A
500kHz
86.6%, See Figure 4
< 60mV , See Figure 5
P-P
dc2479abf