Texas Instruments LM3423 Evaluation Board LM3423BBLSCSEV/NOPB LM3423BBLSCSEV/NOPB Datenbogen
Produktcode
LM3423BBLSCSEV/NOPB
sec
rad
k
36
=
=
=
533
.
0
95
.
1
2
x
:
H
33
467
.
0
P
x
D
r
2
D
c
x
L1
D x
1
Z
Z
sec
rad
k
19
=
=
=
1.467
F
40
1.95
:
P
x
C
O
r
D
x
D
1+
1
P
Z
0.04
:
R
LIM
=
:
04
.
0
=
=
=
6.13A
mV
245
mV
245
I
LIM
R
LIM
:
=
=
=
041
.
0
6A
R
LIM
mV
245
mV
245
I
LIM
C
O
= 4 x 10
P
F
x
A
1
=
I
LED
I
RMS
CO-
=
1- 0.677
677
.
0
1.45A
x
1- D
MAX
D
MAX
=
D
I
LED
x
=
'
i
PP
-
LED
SW
f
x
r
D
x C
O
2
=
=
kHz
01
5
95
.
1
x
x
:
1 mA
467
.
0
A
1 x
F
40
P
'
i
PP
-
LED
f
'
i
r
SW
PP
-
LED
D
x
x
D
I
LED
x
C
O
=
2
=
F
39.8
P
=
kHz
01
5
mA
1
95
.
1
x
x
:
467
.
0
A
1 x
C
O
H
33
1
L
P
=
SNVS574E – JULY 2008 – REVISED MAY 2013
(111)
5. OUTPUT CAPACITANCE
Solve for C
O
:
(112)
The closest capacitance totals 40 µF therefore
Δ
i
LED-PP
is:
(113)
Determine minimum allowable RMS current rating:
(114)
The chosen components from step 5 are:
(115)
6. PEAK CURRENT LIMIT
Solve for R
LIM
:
(116)
The closest standard resistor is 0.04
Ω
therefore I
LIM
is:
(117)
The chosen component from step 6 is:
(118)
7. LOOP COMPENSATION
ω
P1
is approximated:
(119)
ω
Z1
is approximated:
(120)
T
U0
is approximated:
42
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