Datasheet

UCC1806
UCC2806
UCC3806
SLUS272F -- FEBRUARY 2000 -- REVISED AUGUST 2006
8
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FUNCTIONAL BLOCK DIAGRAM
UDG--99035
10
7
3
8
SYNC
9RT
+
--
4.4V
+
--
1.5 V
OSC
LO
CT
+
--
3X
4
+
--
5
+
--
EA
6
1
S
1
QB
R
S
2
13 VC
11 AOUT
14 BOUT
12 GND
T
Q
QB
Shutdown
Lockout
S
1
Q
R
S
2
+
--
+
--
16
1.0 V
0.35 V
Q
R
S
Current Limit
Restart
UVLO
15
+
--
+
--
15 V
5.1 V
Reference
Regulator
+
--
Reference Low
4.25 V
2
CURLIM
SHUT
VREF
0.5 V
--
+
Comparator
7.0 V
7.5 V
CS--
CS+
NI
INV
COMP
VIN
SQ
R
200kΩ
200 μA
120 μA
DOWN