Getting Started
4
Getting Started
•
Connect the positive and negative terminal of the power supply to pin 1 and pin 2 of J1.
•
Place a jumper on pins 1 and 2 of JP1 (EN and OFF).
•
Place a jumper on JP2.
•
Place a probe and current probe as shown:
–
Channel 1: TP1 (VIN) – DC, 5 V/div
–
Channel 2: TP2 (VOUT) – DC, 2 V/div
–
Channel 3: TP4 (/FAULT) – DC, 2 V/div
–
Channel 4: Input current – DC 1 A/div
Time scale is 5 ms/div.
4.1
Monitor
•
Turn on the power supply.
•
There should be no output voltage.
•
Move the jumper on JP1 to pins 2 and 3 (ON and EN).
•
Vin should pass through to the output.
•
Set the scope for normal trigger, single sweep. Trigger on Channel 2, negative slope at 3.5 V.
4.2
Verify EVM Output
Momentarily short the output connector.
Observe the waveform as shown in
Figure 2. Channel 1(VIN), Channel 2 (VOUT), Channel 3 (/FLT), Channel 4 (IIN)
Channel 4 reaches IOS current limit. Afterward, Channel 2 goes low and Channel 3 goes low after t
fault
(/Fault deglitch).
3
SLUUB15 – April 2014
TPS2559EVM-624 Evaluation Module
Copyright © 2014, Texas Instruments Incorporated
