2
dc1865af
DEMO MANUAL DC1865A
Quick start proceDure
DC1865A is easy to set up to evaluate the performance
of the LT3055. Refer to Figure 1 for proper measurement
equipment setup and follow the procedure below:
NOTE: Make sure that the input voltage does not exceed 45V.
NOTE: The shutdown jumper JP8 shunt is required to be
placed in the OFF or ON position for proper operation.
NOTE: Place the output voltage selection jumper JP1-JP7
at the desired position.
NOTE: Do not hot-plug the input voltage terminal V
IN
. The
absolute maximum voltage on V
IN
is 50V and hot-plugging
a power supply through wire leads to the demonstration
circuit can cause the voltage on the extremely low-ESR
ceramic input capacitor to ring to twice its DC value. In
order to protect the IC, a higher ESR Aluminum Electro-
lytic capacitor is placed at the input terminals. This may
protect against some, but not all, input transients due to
hot-plugging with a power supply. See Application Note
88 for more details.
NOTE: Connect the power supply (with power off), load,
and meters as shown in Figure 1.
1. After all connections are made, turn on input power and
verify that the output voltage according to the output
voltage selection jumper (JP1-JP7). If the output voltage
is different from the above values, use the USER option
and install R7. Select R7 according to the following
equation:
R7 = (V
OUT
/0.6 – 1) • 60.4k
NOTE: If the output voltage is too low, temporarily
disconnect the load to make sure that the load is not
set too high.
2. Once the proper output voltage is established, adjust
the load within the operating range and observe the
output voltage regulation,
FAULT1
,
FAULT2
, PWRGD
and other parameters.
Downloaded from
Downloaded from
