Datasheet

1
0 064=then : M .
(81)
1
0 139 0 214= ´ -then : M . VCOMP .
(82)
1
0 279 0 632= ´ -then : M . VC O M P .
(83)
1
0 903=then : M .
(84)
1
4
0 279 4 0 632 0 484
VCOMP
M . . .
=
= ´ - =
(85)
2
0
m
=
V
then : M
s
(86)
2
2
0 1223 1 5
m
= ´ -
V
then : M . (VCOMP . )
s
(87)
2
2 056
m
=
V
then : M .
s
(88)
2
2
4
0 1223 4 1 5 0 764
VCOMP
V V
M . ( . ) .
s sm m
=
= ´ - =
(89)
UCC28019A
www.ti.com .................................................................................................................................................. SLUS828B – DECEMBER 2008 – REVISED APRIL 2009
The individual loop factors, M
1
which is the current loop gain factor, and M
2
which is the voltage loop PWM ramp
slope, are calculated using the following conditions:
The M
1
current loop gain factor:
• if : 0 < VCOMP < 2
• if : 2 ≤ VCOMP < 3
• if : 3 ≤ VCOMP < 5.5
• if : 5.5 ≤ VCOMP < 7
In this example:
The M
2
PWM ramp slope:
• if : 0 < VCOMP < 1.5
• if : 1.5 ≤ VCOMP < 5.6
• if : 5.6 ≤ VCOMP < 7
In this example:
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