Datasheet NCP431 (ON Semiconductor) - 10

NCP431A, SC431A, NCP431B, SC431B, NCP432B, SC432B Series
V+ VOUT V+ VOUT R1 R1 R2 R2 R1 R1 V Ǔ Ǔ OUT(trip) + ǒ1 ) V V V R2 ref OUT(trip) + ǒ1 ) R2 ref
Figure 28. Triac Crowbar Figure 29. SRC Crowbar
V+ VOUT V+ I R1 R3 R1 VOUT
VIN VOUT
VIN < Vref V+ > Vref [2.0 V R2 R4 Vth + Vref
Figure 31. Single−Supply Comparator with Temperature−Compensated Threshold
L.E.D. indicator is ‘on’ when V+ is between the uppper and lower limits. R1 Lower Limit + ǒ1 ) ǓV R2 ref R3 Upper Limit + ǒ1 ) ǓV R4 ref
Figure 30. Voltage Monitoring
150 mH @ 2.0 A Vin = 10 to 20 V TIP115 VOUT = 5.0 V IOUT = 1.0 A 1.0k 1N5823 4.7 k 4.7k 100k MPSA20 2200 mF 0.01 mF 470 mF 4.7k 0.1 mF 2.2k 10 51k
Figure 32. Step−Down Switching Converter www.onsemi.com 10