cupoftea
Advanced Member level 5
Hi,
Page 13 of UC3854 Datasheet
..shows a Zener diode D5. In the attached LTspice sim of LT1248.....you can see that a zener here stops power going above a certain level......but the UC3854 has peak current limiting anyway, so why bother with D5. What fault mode would D5 be expected to serve? Also, what value would D5 typically be?
EDIT....ok , Apologies found it, page 11 of slua172..
slua172
Page 13 of UC3854 Datasheet
..shows a Zener diode D5. In the attached LTspice sim of LT1248.....you can see that a zener here stops power going above a certain level......but the UC3854 has peak current limiting anyway, so why bother with D5. What fault mode would D5 be expected to serve? Also, what value would D5 typically be?
EDIT....ok , Apologies found it, page 11 of slua172..
slua172
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