Datasheet
CT
VIN
4
16
U1
TPS2420RSA
UDG-09018
EN
15 V
D1
SMAJ15A
CT
560 nF
IMON
VOUT
13
14
15
12
FLT
PG
R
IMON
63.4 kW
VIN2
VIN
3
VIN
1
C1
1 mF
GND
5
LTCH6
IMAX
7
IFLT
8
R
IMAX
57.6 kW
R
IFLT
80.6 kW
11
10
9
VOUT
VOUT
R1 10 kW
R2 10 kW
D2
MBR130LSFT1
12 V
V
OUT
GND
PowerPAD
GND
12 V
V
IN
TPS2420
SLUS903E –JANUARY 2009–REVISED MAY 2013
www.ti.com
Figure 25. TPS2420 Reference Design, 12-V, 2.5-A Steady State Current, 5-A Max Current
NOTE
D1, D2, and C1 are required only in systems with significant feed and/or load inductance.
To alter parameters I
IAX
, I
FAULT
, I
IMON
or C
CT
use the formulas in the Pin Description section or use Table 2 .
Table 2. Typical Design Examples
I
FAULT
(A) R
IFLT
(kΩ) I
IMAX
(A) R
IMAX
(kΩ) C
CT
(μF) T
FAULT
(ms) T
SD
(ms) I
LOAD(max)
(A) R
IMON
(kΩ)
1 200 2 100 0.022 0.86 22 1 158
1.5 133 2.5 80.6 0.047 1.83 47 1.5 105
2 100 3 65.5 0.1 3.89 100 2 78.7
2.5 80.6 3.5 56.2 0.22 8.56 220 2.5 63.4
3 65.5 4 49.9 0.47 18.28 470 3 52.3
3.5 56.2 4.5 44.2 0.68 26.45 680 3.5 45.3
4 49.9 5 40.2 1 38.9 1000 4 39.2
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