Datasheet

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1 2
0 484 0 764 0 37
V V
M M . . .
s sm m
´ = ´ =
1 2
0 37 0 372
V V
. M M .
s sm m
@ =
2
3
0 3
0 0510 0 1543 0 1167
if : VCOMP
then : M . VCOMP . VCOMP .
< <
= ´ - ´ -
2
3
3 7
0 1026 0 3596 0 3085
if : VCOMP
then : M . VCOMP . VCOMP .
£ <
= ´ - ´ +
2
3
4
0 1026 4 0 3596 4 0 3085 0 512
VCOMP
M . . . .
=
= ´ - ´ + =
1
1
2
ICOMP
IAVG
gmiM
C
K fp
=
0 95 0 484
1100
7 2 9 5
ICOMP
. mS .
C pF
. kHzp
´
= =
´ ´ ´
UCC28019
SLUS755B – APRIL 2007 – REVISED DECEMBER 2007
Verify that the product of the individual gain factors is approximately equal to the M
1
M
2
factor determined above,
if not, reselect VCOMP and recalculate M
1
M
2
.
The non-linear gain variable, M
3
, can now be calculated:
The frequency of the current averaging pole, f
IAVG
, is chosen to be at 9.5 kHz. The required capacitor on ICOMP,
C
ICOMP
, for this is determined using the transconductance gain, gmi, of the internal current amplifier:
Copyright © 2007, Texas Instruments Incorporated Submit Documentation Feedback 35
Product Folder Link(s): UCC28019