Analog Devices DC2784B-A Demo Manual page 2

DEMO MANUAL
DC2784B-A
PERFORMANCE SUMMARY
PARAMETER
Input Voltage Range
Output Voltage, V
OUT
Maximum Output Current, I
OUT
Typical Efficiency
Default Switching Frequency
QUICK START PROCEDURE
Table 1. LTM4700 Demo Boards for Up to 400A Point-of-Load
Regulation
MAXIMUM NUMBER NUMBER OF LTM4700
OUTPUT OF µModule REGULATORS
CURRENT OUTPUTS
50A 2
100A 1
200A 1
300A 1
400A 1
Demonstration circuit 2784B-A is easy to set up to evalu-
ate the performance of the LTM4700EY. 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 VIN
(4.5V to 16V) and GND (input return).
2. Connect the 1.0V output load between VOUT and GND
(initial load: no load).
3. Connect the DVMs to the input and outputs. Set default
jumper position: JP1: ON; JP2: ON; JP3: ON.
2
Specifications are at T
CONDITIONS
V = 4.5V to 16V, I
IN
V = 4.5V to 16V, V
IN
V = 12V, V = 1.0V, I
IN OUT
DEMO BOARD
ON THE BOARD NUMBER
1 DC2702A-A
1 DC2702A-B
2 DC2784B-A
3 DC2784B-B
4 DC2784B-C
= 25°C
A
= 0A to 200A
OUT
= 0.5V to 1.8V
OUT
= 200A
OUT
4. Turn on the input power supply and check for the
proper output voltages. V
5. Once the proper output voltages are established,
adjust the loads within the operating range and ob-
serve the output voltage regulation, ripple voltage and
other parameters.
6. Connect the dongle and control the output voltages
from the GUI. See "LTpowerPlay GUI for the LTM4700
Quick Start Guide" for details.
NOTE: Internal bias circuit is enabled when V
JP3 is ON.
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.
MIN TYP MAX
4.5
0.5 1.0
200
88.7 (See Figure 5)
350
should be 1.0V ±0.5%.
OUT
VALUE
16 V
1.8 V
A
%
kHz
> 7V and
IN
Rev. 0