Quick Start Procedure - Linear Technology DC2087A Demo Manual

DEMO MANUAL DC2087A
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. LTM4676 Demo Cards for Up to 100A Point-of-Load Regulation
MAXIMUM OUTPUT CURRENT
13A, 13A
26A
50A
75A
100A
100A
130A
Demonstration circuit 2087A is easy to set up to evaluate
the performance of the LTM4676EY. 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–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.
4. Turn on the input power supply and check for the proper
output voltages. V
OUT
5. Once the proper output voltages are established, ad-
just the loads within the operating range and observe
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 LTM4676
Quick Start Guide for details.
2
Specifications are at T
CONDITION
V = 4.5 to 16V, I
IN
V = 4.5 to 16V, V
IN
V = 12V, V
IN OUT
NUMBER OF OUPUT VOLTAGES
2
1
1
1
1
1
1
should be 1.0V ±1 %.
= 25°C
A
= 0A to 26A
OUT
= 0.5V to 4V
OUT
= 1.2V, I = 26A
OUT
NUMBER OF LTM4676 µMODULE
REGULATORS ON THE BOARD
1
1
2
3
4
1(+3 × LTM4620A)
1(+3 × LTM4630)
Note: When measuring the output or input voltage ripple,
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.
Connecting a PC to DC2087A
You can use a PC to reconfigure the power management
features of the LTM4676 such as: nominal V
set points, OV/UV limits, temperature fault limits, sequenc-
ing parameters, the fault log, fault responses, GPIOs and
other functionality. The DC1613A dongle may be plugged
when V is present.
IN
VALUE
4.5V to 16V
0.5V to 4V, Default: 1V
26A
83.2%
350kHz
DEMO BOARD NUMBER
DC1811A
DC2087A
DC1989A-A
DC1989A-B
DC1989A-C
DC2106A-A
DC2106A-B
, margin
OUT
dc2087af