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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:Makesurethattheinputvoltagedoesnotexceed45V.

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.

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

voltageselectionjumper(JP1-JP7).Iftheoutputvoltage

is different from the above values, use the USER option

and install R7. Select R7 according to the following

equation:

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.