Analog Devices DC2896A-B Demo Manual page 2

DEMO MANUAL DC2896A-B
PERFORMANCE SUMMARY
PARAMETER
Minimum Input Voltage, V
IN
Maximum Input Voltage, V
IN
Output Voltage, V
OUT
Input Current, I
IN
Efficiency
Switching Frequency
QUICK START PROCEDURE
To evaluate the performance of DC2896A-B follow pro-
cedure below.
1. Read LT8551 data sheet, conduct visual inspection
of DC2896A-B, locating input/output terminals and
control jumpers.
2. Prepare to use the SHDN terminal to control the startup.
Connect the SHDN terminal to GND by setting jumper
SHDN (JP2) into OFF position.
3. Set the STAGE SHED MODE jumper JP3 to ENABLE
if phase shedding is desired or to DESABLE if phase
shedding is not desired.
4. Set the SYNC jumper JP1 to fixed frequency by insert-
ing jumper into FIX FQ position.
5. Check the phase selection, TDPN SET, by inspecting
connections resistors R114 to R119.
6. Connect the input power supply with power off, load
and meters as shown on Figure 1.
2
Specifications are at T
CONDITIONS
V = 24V, I = 30A
IN OUT
7. Make sure that input power supply is 1,600W and
output current at least 70A, the same related to load,
it should be at least 1,600W and 60V rating.
8. After connections are made, turn on the input power
supply and verify that input voltage between 12V
and 46V.
9. Set output load to 0A.
10. Set jumper SHDN (JP2) into ON position, you should
observe 48V on the output terminals and the load.
11. Once the proper output voltage is established, adjust
the load and observe the output voltage regulation,
ripple voltage, efficiency and other parameters.
NOTE: If the output voltage is low, try startup again using
SHDN with the load disconnected. The load may cause
low output if some of the DC2896A-B power sections
are inadvertently disconnected and not able to deliver
power. It is possible the input supply may current limit and
cause DC2896A-B to have low output. In more extreme
cases it is possible that the load may be set too high for
DC2896A-B.
= 25°C
A
MIN
46
250
TYP MAX UNITS
10 V
V
48 V
60 A
98 %
kHz
Rev. 0