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SLMA002 Datasheet(PDF) 35 Page - Texas Instruments

Part # SLMA002
Description  3-A DUAL NON-SYNCHRONOUS CONVERTER WITH INTEGRATED HIGH-SIDE MOSFET AND EXTERNAL COMPENSATION
PDF  46 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

SLMA002 Datasheet(HTML) 35 Page - Texas Instruments

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background image
(
)
(
)
(
)
(
) (
)
(
)
2
2
2
CON1
OUT
DS on
QSW RMS
DS on
P
R
I
R
I
D
0.085
3 A
0.540
0.562 W
=
´
»
´
´
=
W ´
´
=
(53)
(
)
(
)
(
)
(
) (
)
(
)
2
2
2
CON2
OUT
DS on
QSW RMS
DS on
P
R
I
R
I
D
0.085
3 A
0.370
0.465 W
=
´
»
´
´
=
W ´
´
=
(54)
(
)
(
)
(
)
2
2
Dj
OSS
SW
IN max
SW1
SW 2
V
(C
C
)
f
13.2
(200 pF
250 pF)
600 kHz
P
P
23.5 mW
2
2
´
+
´
´
+
´
=
»
=
=
(55)
(
)
(
)
(
)
REG
DD
BP
BP
IN max
IN max
P
I
V
I
V
V
5 mA
13.2 V
66 mW
»
´
+
´
-
=
´
=
(56)
DESIGN EXAMPLE 1 TEST RESULTS
0.15
75
70
1.15
85
80
90
100
95
0.65
1.65
2.65
2.15
3.15
14
8
12
V
IN
(V)
V
IN
= 14 V
V
IN
= 12 V
V
IN
= 8 V
I
LOAD
– Load Current – A
V
OUT
= 5 V
0.15
1.15
0.65
1.65
2.65
2.15
3.15
I
LOAD
– Load Current – A
75
70
85
80
90
100
95
14
8
12
V
IN
(V)
V
IN
= 14 V
V
IN
= 12 V
V
IN
= 8 V
V
OUT
= 3.3 V
TPS55383
,, TPS55386
www.ti.com ......................................................................................................................................................................................... SLUS818 – SEPTEMBER 2008
Power Dissipation
The power dissipation in the TPS55386 is from FET conduction losses, switching losses and regulator losses.
Conduction losses are estimated by:
The switching losses are estimated by:
The regulator losses are estimated by:
Total power dissipation in the device is the sum of conduction and switching losses for both channels plus
regulator losses, and are estimated to total 1.2 W.
EFFICIENCY
EFFICIENCY
vs
vs
LOAD CURRENT
LOAD CURRENT
Figure 34.
Figure 35.
Copyright © 2008, Texas Instruments Incorporated
Submit Documentation Feedback
35
Product Folder Link(s): TPS55383 TPS55386



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