PTB48510_14 Datasheet, PDF (8/18 Pages) Texas Instruments – DUAL COMPLEMENTARY-OUTPUT DC/DC CONVERTER FOR DSL

Not Recommended for New Designs
PTB48510
PTB48511
SLTS219F – FEBRUARY 2004 – REVISED MARCH 2007
TYPICAL CHARACTERISTICS (Continued)
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PTB4851xB CHARACTERISTIC DATA at V_I = 48 V ^{(1) (2)}
Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the
converter.
EFFICIENCY
vs
LOAD CURRENT
100
90
80
70
60
POWER DISSIPATION
vs
LOAD CURRENT
12
10
8
6
4
2
CROSS REGULATION
400
D V_O1 with I_O1 = 1 A
200
0
-200
50
0
0.5
1.0 1.5
2.0
2.5 3.0
(I_O1 = I_O2) - Load Current - A
Figure 6. ⁽¹⁾
0
0
0.5
1.0 1.5
2.0
2.5 3.0
(I_O1 = I_O2) - Load Current - A
Figure 7. ⁽¹⁾
-400
0
0.5
1.0 1.5
2.0
2.5 3.0
I_O2 - Load Current - A
Figure 8.
CROSS REGULATION
400
D V_O2 with I_O2 = 1 A
SAFE OPERATING AREA
90
80
200
70
400 LFM
60
200 LFM
0
50
100 LFM
-200
-400
0
0.5
1.0 1.5
2.0
2.5 3.0
I_O1 - Load Current - A
Figure 9.
40
Natural
30
Convection
V_I = 48 V_DC
20
0
0.5
1.0 1.5
2.0
2.5 3.0
(I_O1 = I_O2) - Load Current - A
Figure 10. ^{(1) (2)}
(1) Under a balanced load, current flowing out of V_O1 is equal to that flowing into V_O2.
(2) SOA curves represent the conditions at which internal components are at or below the manufacturer's maximum operating
temperatures. Derating limits apply to modules soldered directly to a 4 in. × 4 in. double-sided PCB with 1 oz. copper.
8
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