Datasheet

SLUU172 − October 2003

Evaluation Modules for −48-V Hot Swap Controllers

3.2 Verifying the EVM Operation

The following procedure steps may be used to verify functional operation of the EVM after

receipt.

3.2.1 Equipment Setup

1. On the EVM board, place the POWER switch in the OFF position, and verify that the

ENABLE switch is in the OFF position.

2. Set the DIP switches 1 through 4 of switch SW1 to the ON position.

3. Turn on the power supply and adjust the output for about 48 V. Verify the supply current

limit is set to allow at least 3 A. Turn off the power supply.

4. Connect the EVM and test equipment as shown in Figure 3.

5. On the oscilloscope, set the channel amplifiers to the following scales:

• CH1: 20 V/div

• CH2: 2 V/div

• CH3: 5 V/div

• CH4: 20 V/div

For easier correlation to the information in this document, the scope trace baselines can be

positioned as shown in Figure 4.

6. Set the scope to trigger on the rising edge of Channel 1, at approximately a 10-V level.

Set the scope timebase to 10 ms, and the trigger mode to NORMAL.

UDG−03019

OSCILLOSCOPE

CH 1

CH 2

CH 3

CH 4

POWER

SUPPLY

−+

J2 (−48V_IN)

J1 (−48V_RTN)

TP2

TP4

TP3

TP16

TP15

TP14

TP8/TP12 (GND)

VOLTS COM

DIGITAL

VOLTMETER

−48-V Hot Swap Controller

Evaluation Module

(TPS2398EVM/TPS2399EVM)

Figure 3. Evaluation Module Setup