AN2983

Circuit description

Doc ID 15679 Rev 1

23/32

resistor, Q3 turns off allowing C5 to charge through R6, and the voltage of the INV pin rises

again. When it reaches 0.45 V the disable condition is removed and the controller restarts.

If the short-circuit condition is removed, the circuit restores its normal functionality. If the

short-circuit condition persists, the hiccup cycle is repeated.

Figure 23.

Short-circuit application

Figure 24.

Short-circuit removal

Figure 25.

Short-circuit detection

Figure 26.

Load current decay