PTB48500 Datasheet, PDF (8/14 Pages) Texas Instruments – Dual-Output, 48-V Input Isolated DC/DC Converter for xDSL

PTB48502
Dual-Output, 48-V Input Isolated
DC/DC Converter for xDSL
Typical Characteristics
SLTS218B - SEPTEMBER 2003 - REVISED NOVEMBER 2004
PTB48502A Characteristic Data (See Note A)
[Io₁ =10 A, Io₂ =10 A represents 100% load]
Efficiency vs Load Current (See Note B)
100
90
V_I
80
36 V
48 V
70
75 V
60
50
0
20
40
60
80
100
Output Load – %
Power Dissipation vs Load Current (See Note B)
12
10
8
V_I
75 V
6
48 V
36 V
4
2
0
0
20
40
60
80
100
Output Load – %
Cross Regulation, ∆V_x vs. ∆V_y @Io_x =1 A & V_I =48 V
6
4
2
Vo₁ vs Io₂
0
Vo2 vs Io1
-2
-4
-6
0
2
4
6
8
10
Io₁ : Io₂ – (A)
Safe Operating Area, V_IN =48 V (See Notes B, C)
90
80
70
Airflow
400LFM
60
200LFM
100LFM
50
Nat conv
40
30
20
0
10 20 30 40 50 60 70 80 90 100
Output Load – %
PTB48502A Characteristic Data (See Note A)
[Io₁ =8 A, Io₂ =13 A represents 100% load]
Efficiency vs Load Current (See Note B)
100
90
V_I
80
36 V
48 V
70
75 V
60
50
0
20
40
60
80
100
Output Load – %
Power Dissipation vs Load Current (See Note B)
12
10
8
V_I
75 V
6
48 V
36 V
4
2
0
0
20
40
60
80
100
Output Load – %
Cross Regulation, ∆V_x vs. ∆V_y @Io_x =1 A & V_I =48 V
6
4
2
0
Vo₁ vs Io₂
Vo₂ vs Io₁
-2
-4
-6
0
2
4
6
8
10
12
Io1 : Io2 – (A)
Safe Operating Area, V_IN =48 V (See Notes B, C)
90
80
70
Airflow
400LFM
60
200LFM
100LFM
50
Nat conv
40
30
20
0
10 20 30 40 50 60 70 80 90 100
Output Load – %
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 indicated maximum value of each respective 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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