Handling Current and Power Spikes

Many Tibbo Project System (TPS) configurations exhibit a "pulsating" current consumption pattern.

The pulse handling ability of Tibbit #33 depends on the input voltage, average output power, and ambient temperature. The following information can be used as a reference point: Tibbit #33 can output a sustained 1.5A of current while handling current pulses of up to 2A, but such current pulses should not be longer than 100ms. As a rule of thumb, the average output current over a long period of time should not exceed 1.5A by more than 5 percent.

In common usage scenarios like wireless and cellular applications, current consumption periodically peaks for 10–100ms (usually for less than 1 percent of the duty cycle), as shown in Fig. 2a and 2b.

tibbit_33_fig_2a
tibbit_33_fig_2b

Fig. 2a — Maximum Current Test @ +85°C

Fig. 2b — Maximum Current Test @ +85°C

Tibbit #33 can handle voltage spikes of up to 100V while operating at full load throughout the entire industrial temperature range. For reliable module operation, each spike's length should not exceed 100ms at a duty cycle of 10 percent. Fig. 3 illustrates the test that Tibbit #33 successfully passed.

tibbit_33_fig_3

Fig. 3 — Voltage Spikes @ +85°C