NCP1581

http://onsemi.com

11

Figure 13. Start-up to Pre-biased Output

1 V

2 V

3 V

Short Circuit Protection

The output of convertor with NCP1581 is protected

against short circuit conditions. This protection is sensing

output voltage through feedback divider on FB pin. On this

pin is comparator that compares FB voltage to 0.4 V. If FB

voltage is below 0.4 V then IC goes to latch state and switch

output drivers to off state. Latch state can be released by

Output

shorted

Threshold

Figure 14. Short Circuit Protection (Start Up,

Short, Latch, Latch Release and New Start-up)