Analog Devices LINEAR DC2672A-A, Demo Manual

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DEMO MANUAL DC2672A-A
Rev. 0
QUICK START PROCEDURE
Demonstration circuit 2672A-A is easy to set up to evalu-
ate the performance of the LTM4664. Refer to Figure 2
for the proper measurement equipment setup and follow
the procedure below.
1. With power off, connect the input power supply to V
IN
(30V-58V) and GND (input return).
2. Connect the 1.0V output load between V
OUT0
and GND
(Initial load: no load).
3. Connect the 1.0V output load between V
OUT1
and GND
(Initial load: no load).
4. Connect the DVMs to the input and outputs. Set de-
fault jumper position: SW1: ON; SW2: ON; SW3: ON;
JP1: OFF; JP2: EXT.
5. Turn on the input power supply and check for the
proper output voltages. V
OUT0
should be 1.0V±0.5%,
and V
OUT1
should be 1.0V±0.5%.
6. Once the proper output voltages are established, adjust
the loads within the operating range and observe the
output voltage regulation, ripple voltage and other
parameters.
7. Connect the dongle and control the output voltages
from the GUI. See “LTpowerPlay GUI for the LTM4664
Quick Start Guide” for details.
Note: When measuring the output or input voltage rip-
ple, do not use the long ground lead on the oscilloscope
probe. See Figure 3 for the proper scope probe technique.
Short, stiff leads need to be soldered to the (+) and (−)
terminals of an output capacitor. The probe’s ground ring
needs to touch the (−) lead and the probe tip needs to
touch the (+) lead.
Table 1. LTM4664 Demo Boards for up to 200A Point-of-Load Regulation
MAXIMUM OUTPUT CURRENT NUMBER OF OUPUTS
NUMBER OF LTM4664 µMODULE
REGULATORS ON THE BOARD DEMO BOARD NUMBER
25A 2 1 DC2672A-A
50A 1 1 DC2672A-B
100A 1 2 DC2954A-A
150A 1 3 DC2954A-B
200A 1 4 DC2954A-C
PERFORMANCE SUMMARY
Specifications are at T
A
= 25°C
PARAMETER CONDITIONS VALUE
Input Voltage Range 30V to 58V
Output Voltage, V
OUT0
V
IN
= 30-58V, I
OUT0
= 0A to 25A 0.5 to 1.5V, Default: 1.0V
Maximum Output Current, I
OUT0
V
IN
= 30-58V, V
OUT0
= 0.5V to 1.5V 25A
Output Voltage, V
OUT1
V
IN
= 30-58V, I
OUT1
= 0A to 25A 0.5 to 1.5V, Default: 1.0V
Maximum Output Current, I
OUT1
V
IN
= 30-58V, V
OUT1
= 0.5V to 1.5V 25A
Typical Efficiency of CH0 V
IN
= 48V, V
OUT0
= 1.0V, I
OUT0
= 25A 87.0% (See Figure 5)
Typical Efficiency of CH1 V
IN
= 48V, V
OUT1
= 1.5V, I
OUT1
= 25A 89.4% (See Figure 6)
Default Switching Frequency 250kHz