AN1441

Functional description

Doc ID 8422 Rev 2

7/13

1.5

Thermal protection

Figure 9.

Thermal protection behavior

Thermal protection occurs when the junction temperature exceeds 135 °C and the thermal

hysteresis is 15 °C. This feature safeguards the device from dangerous currents or

temperatures. Figure 9 shows the thermal protection behavior. The pulse width and period

of the output current depend on the thermal dissipation. This test was made in a free air

temperature condition.

1.6

ON Pin Function

Figure 10.

Turn-on time

Figure 11.

Turn-off time