Datasheet

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2
1 2
FB
FB
FB FB
R
G
R R
=
+
13
0 013
1 13
FB
k
G .
M k
W
= =
W + W
3
1
2
1 2
1
2
PWM _ PS
SENSE OUT OUT
FQ IN ( typ )
f
K R V C
K M M V
p
=
3
2
1
1 589
7 0 067 390 270
2
15 385 0 484 0 764 115
PWM _ PS
f . Hz
. V F
V
. s . . V
s
m
p
m
m
= =
´ W´ ´
´ ´ ´
3
1 2
1
1
2
OUT
PWM _ PS
PWM _ PS
M V
M M s
G ( f )
s( f )
f
m
p
´
=
+
VL FB PWM _ PS
G ( f ) G G ( f )=
( )
20
VLdB VL
G ( f ) log G ( f )=
1*10
4
qG
VL
(f)
f - Hz
-60
20
G
VLdB
(f)
OPEN LOOP VOLTAGE TRANSFER
FUNCTION
-40
-20
0
10 100 1*10
3
-100
-80
-60
-40
-20
0
10.10.01
Gain
Phase
UCC28019
SLUS755B – APRIL 2007 – REVISED DECEMBER 2007
Figure 31. Bode Plot of the Open Loop Voltage Transfer Function
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