PTB78560A_15 Datasheet, PDF (9/27 Pages) Texas Instruments – 30-W, 24-V/48-V INPUT DC/DC CONVERTERS WITH AUTO-TRACK™ SEQUENCING

www.ti.com
PTB78560A, PTB78560B
PTB78560C
SLTS249 – JUNE 2005
TYPICAL CHARACTERISTICS (continued)
PTB78560B Characteristic Data (V_O = 3.3 V) ⁽³⁾⁽⁴⁾
EFFICIENCY
vs
OUTPUT CURRENT
85
V_I=18 V
80 _{VI=24 V}
75
70
65
V_I=36 V
60
V_I=48 V
55
50
V_I=60 V
45
40
0
2
4
6
I_O − Output Current − A
Figure 6.
POWER DISSIPATION
vs
OUTPUT CURRENT
8
7
6
V_I=60 V
5
V_I=48 V
V_I=36 V
4
3
V_I=24 V
V_I=18 V
2
1
0
8
0
2
4
6
8
I_O − Output Current − A
Figure 7.
OUTPUT VOLTAGE RIPPLE
vs
OUTPUT CURRENT
50
45
40
35
30
25
20
15
10
5
0
0 1 234 56 7 8
I_O − Output Current − A
Figure 8.
TEMPERATURE DERATING
vs
OUTPUT CURRENT (V_I = 24 V)
90
TEMPERATURE DERATING
vs
OUTPUT CURRENT (V_I = 48 V)
90
80
80
70
400 LFM
60
200 LFM
50
100 LFM
40
0 LFM
(Natural Convection)
30
70
400 LFM
60
200 LFM
50
100 LFM
40
0 LFM
(Natural Convection)
30
20
0 1 23 4 5 6 7 8
I_O − Output Current − A
Figure 9.
20
0 1 23 4 5 6 7 8
I_O − Output Current − A
Figure 10.
(3) All data listed in Figure 6, Figure 8, and Figure 7 have been developed from actual products tested at 25°C. This data is considered
typical data for the dc-dc converter.
(4) 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 9, and Figure 10.
Submit Documentation Feedback
9