PTB48500_06 Datasheet, PDF (9/17 Pages) Texas Instruments – DUAL-OUTPUT, 48-V INPUT ISOLATED DC/DC CONVERTER for xDSL

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PTB48500
PTB48501
PTB48502
SLTS218C – SEPTEMBER 2003 – REVISED AUGUST 2006
TYPICAL CHARACTERISTICS ^(1)(2)(3)
CHARACTERISTIC DATA (PTB48502A)
[Io₁ = 10 A, Io₂ = 10 A represents 100% load]
EFFICIENCY
vs
LOAD CURRENT
100
(See Note B)
90
V_I = 36 V
V_I = 48 V
80
V_I = 75 V
70
60
50
0
20
40
60
80
100
I_L − Load Current − A
Figure 9.
POWER DISSIPATION
vs
LOAD CURRENT
12
(See Note B)
10
V_I = 75 V
8
6
4
V_I = 36 V
2
V_I = 48 V
0
0
20
40
60
80
100
I_L − Load Current − A
Figure 10.
CROSS REGULATION
∆Vo_x vs Io_y
Io_x = 1 A and V_I = 48 V
6
4
2
V_O 1 vs I_O 2
0
V_O 2 vs I_O 1
−2
−4
−6
0
2
4
6
8
10
I_L − Load Current − A
SAFE OPERATING AREA
V_I = 48 V
90
400LFM
80
Nat Conv
70
100LFM
60
50
200LFM
40
30
V_I = 48 VDC
(See Note B, C)
20
0 10 20 30 40 50 60 70 80 90 100
Total Output Power − W
Figure 11.
Figure 12.
(1) A. Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the converter.
(2) B. Load current is increased proportionally from both outputs, up to the indicated maximum value of each respective output.
(3) C. 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.
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