Datasheet

 
 

SLUS542F − OCTOBER 2003 − REVISED JULY 2009
6
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FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
16
15
14
13
VIN (UCC2891/3)
LINEOV (UCC2892/4)
LINEUV
VDD
OUT
RDEL
RTON
RTOFF
VREF
5
6
7
8
SYNC
GND
CS
RSLOPE
12
11
10
9
AUX
PGND
SS/SD
FB
IRDEL
SYNC
CLOCK
REF
GEN
VDD
5 * ISLOPE
VREF
ISLOPE
CT
+
+
3 * R
SQ
QR
PWM
OFF
TURN−ON
DELAY
TURN−ON
DELAY
IRDEL
VREF
VREF
2 * R
+
+
PWM Offset
0.5 V
OUT1−DMAX
CT
0.05 * IRDEL
VREF
+
UCC2892/4
UCC2891/3
1.27 V
0.75 V
UV
1.27 V
0.05 * IRDEL
VREF
+
OV
1.27 V
+
VDD
13 V/ 8 V
OUT
VDD
VDD
93/94
N−Ch.
UVLO
AND
SS
VDD
VREF
UV
OV
VREF
ENABLE
+
92/94
91/93
91/92
P−Ch.
VDD
OK
OV OFF
UV OFF
1−DMAX
TYP: VREF = 5.0 V
75k
1/2 x V
REF
1/2 x V
REF
1/2 x V
REF
I
RTON
I
RDEL
I
SS
= 0.43 x I
RTON