PTB48500 Datasheet, PDF (4/14 Pages) Texas Instruments – Dual-Output, 48-V Input Isolated DC/DC Converter for xDSL

PTB48500
Dual-Output, 48-V Input Isolated
DC/DC Converter for xDSL
Typical Characteristics
SLTS218B - SEPTEMBER 2003 - REVISED NOVEMBER 2004
PTB48500A Characteristic Data (See Note A)
Efficiency vs Load Current (See Note B)
100
90
V_IN
80
48 V
36 V
75 V
70
60
50
0
2
4
6
8
10
12
Io₁ + Io₂ (A)
Power Dissipation vs Load Current (See Note B)
10
8
V_IN
6
48 V
36 V
4
75 V
2
0
0
2
4
6
8
10
12
Io₁ + Io₂ (A)
Cross Regulation, ∆Vo_x vs Io_y @Io_x =1 A & V_IN =48 V
6
4
2
0
Vo₁ vs Io₂
Vo2 vs Io1
-2
-4
-6
0
1
2
3
4
5
6
7
Io₁ : Io₂ (A)
Safe Operating Area PTB48500A (See Note C)
V_IN =48 VDC (See Note B)
90
80
70
60
50
40
30
20
0
5
10
15
20
25
Total Output Power (W)
Airflow
400LFM
200LFM
100LFM
Nat Conv
30
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the converter.
Note B: Load current is increased proportionally from both outputs, up to the respective maximum value of each output.
Note 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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