PTB78560A_15 Datasheet, PDF (11/27 Pages) Texas Instruments – 30-W, 24-V/48-V INPUT DC/DC CONVERTERS WITH AUTO-TRACK™ SEQUENCING

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PTB78560A, PTB78560B
PTB78560C
SLTS249 – JUNE 2005
TYPICAL CHARACTERISTICS (continued)
PTB78560C Characteristic Data (V_O = 12 V) ⁽⁷⁾⁽⁸⁾
EFFICIENCY
vs
OUTPUT CURRENT
90
V_I=18 V
85
V_I=24 V
80
75
V_I=36 V
70
V_I=48 V
65
V_I=60 V
60
55
50
45
40
0
0.5
1.0
1.5
2.0
2.5
I_O − Output Current − A
Figure 16.
POWER DISSIPATION
vs
OUTPUT CURRENT
7
6
5
V_I=60 V
V_I=48 V
4
V_I=36 V
3
2
V_I=24 V
1
V_I=18 V
0
0
0.5
1.0
1.5
2.0
2.5
I_O − Output Current − A
Figure 17.
OUTPUT VOLTAGE RIPPLE
vs
OUTPUT CURRENT
45
V_I=60 V
40
V_I=48 V
35
30
V_I=36 V
25
20
V_I=24 V
15
V_I=18 V
10
5
0
0
0.5
1.0
1.5
2.0
2.5
I_O − Output Current − A
Figure 18.
TEMPERATURE DERATING
vs
OUTPUT CURRENT (V_I = 24 V)
90
TEMPERATURE DERATING
vs
OUTPUT CURRENT (V_I = 48 V)
90
80
400 LFM
70
200 LFM
60
100 LFM
50
0 LFM
(Natural Convection)
40
80
70
400 LFM
60
200 LFM
100 LFM
50
0 LFM
40
(Natural Convection)
30
30
20
20
0
0.5
1.0
1.5
2.0
2.5
0
0.5
1.0
1.5
2.0
2.5
I_O − Output Current − A
I_O − Output Current − A
Figure 19.
Figure 20.
(7) All data listed in Figure 16, Figure 18, and Figure 17 have been developed from actual products tested at 25°C. This data is considered
typical data for the dc-dc converter.
(8) The temperature derating curves represent operating conditions at which internal components are at or below manufacturer's maximum
rated operating temperature. Derating limits apply to modules soldered directly to a 100–mm × 100–mm, double-sided PCB with 2 oz.
copper. Applies to Figure 19.
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