SLUU150 – February 2003
10
Evaluation Modules for Simple –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
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
Simple –48-V Hot Swap
Controller Evaluation Module
(TPS2390EVM/TPS2391EVM)
Figure 3. Evaluation Module Setup
