Figure 3-33 through Figure 3-37 show the TPS543820 hiccup current limit feature. These waveforms are measured using U2. Figure 3-33 and Figure 3-34 show the response to an overload with the High and Low current limit settings. Figure 3-35 and Figure 3-36 show the response to a hard short on the output with the High and Low current limit settings.

Figure 3-37 shows the TPS543820 entering hiccup with an overload on the output and the High current limit setting with a longer timescale. The TPS543820 tries to restart after the Hiccup wait time period but the overload was still present on the output. In the next restart attempt, the overload has been removed so the TPS543820 starts up normally.

Figure 3-33 U2 Output Overcurrent Protection – Overload with High Limit

Figure 3-35 U2 Output Overcurrent Protection – Short with High Limit

Figure 3-37 U2 OCP Hiccup and Recover – High Limit

Figure 3-34 U2 Output Overcurrent Protection – Overload with Low Limit

Figure 3-36 U2 Output Overcurrent Protection – Short with Low Limit