Datasheet

(ovp) ZCD1
ZCD2
PS
OUT(pk) (ovp)
PB
ZCD R
R =
N
V × -ZCD
N
´
æ ö
ç ÷
è ø
OUT F PS
ZCD1
PB
V + V N
R =
100 A N
´
m
UCC28610
SLUS888F –JANUARY 2009–REVISED SEPTEMBER 2012 www.ti.com
Table 1. Terminal Components (continued)
NAME TERMINAL DESCRIPTION
ZCD 2
where:
ZCD
(ovp)
is the overvoltage fault threshold at ZCD
N
PS
is the primary to secondary turns ratio
N
PB
is the primary to bias turns ratio
V
OUT
is the average output voltage of the secondary
V
F
is the forward bias voltage of the secondary rectifier
V
OUT,PEAK
is the desired output overvoltage fault level
Note 1. Refer to the Electrical Characteristics table for all constants and measured values, unless otherwise noted.
Note 2. Refer to Figure 1 for all component locations in the Table 1.
Revision History
Changes from Revision C (January, 2009) to Revision D Page
• Deleted Equation 2 ............................................................................................................................................................. 14
Changes from Revision D (January 2011) to Revision E Page
• Changed Symplified Block Diagram ................................................................................................................................... 12
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