Datasheet

SLVA037A
16 Designing a USB Power Distribution System Using the TPS2014 and TPS2015 Power Distribution Switches
Appendix B. Transient Load Testing
Figure 9. 500-mA Transient Load Test Circuit
Notes:
1. Channel 1: Output Voltage 50 mV/div
2. Channel 2: Output Current 100 mA/div
3. Time Scale: 2 µs/div
Figure 10. 500-mA Transient
As stated in section 3.1.3, the maximum transient load is 500 mA during normal operation.
Figure 9 shows the test circuit used to determine the voltage droop during a 500-mA transient.
The transient caused only a 50-mV output voltage droop. The droop is mainly due to the
increased resistive losses (connectors, PCB, TPS2014) from the increased output current and
not to the load transient.
The following three tests were implemented to produce the most severe transient and the
highest voltage droop:
• Hot-insertion transient test for the non-ganged configuration
• Hot-insertion transient test for the ganged configuration
• Hot-insertion transient test for the ganged configuration with ferrite beads