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7 8 S T 1 0 0 S e r i e s
C H A R A C T E R I S T I C
D A T A
78ST133_ 3.3 VDC (See Note 1)
78ST105_ 5.0 VDC (See Note 1)
78ST112_ 12.0 VDC (See Note 1)
Efficiency vs Output Current
Efficiency vs Output Current
Efficiency vs Output Current
100
90
80
70
60
50
40
100
90
80
70
60
50
40
100
90
80
70
60
50
40
Vin
Vin
Vin
7.0V
7.0V
14.0V
10.0V
15.0V
20.0V
25.0V
30.0V
10.0V
15.0V
20.0V
25.0V
30.0V
20.0V
25.0V
30.0V
35.0V
0.0
0.5
1.0
1.5
0.0
0.5
1.0
1.5
0.0
0.5
1.0
1.5
Iout (A)
Iout (A)
Iout (A)
Ripple vs Output Current
Ripple vs Output Current
Ripple vs Output Current
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
140
120
100
80
Vin
7.0V
Vin
7.0V
Vin
14.0V
10.0V
15.0V
20.0V
25.0V
30.0V
10.0V
15.0V
20.0V
25.0V
30.0V
20.0V
25.0V
30.0V
35.0V
60
40
20
0
0.0
0.5
1.0
1.5
0.0
0.5
1.0
1.5
0.0
0.5
1.0
1.5
Iout (A)
Iout (A)
Iout (A)
Thermal Derating (Ta)
(See Note 2)
Thermal Derating (Ta)
(See Note 2)
Thermal Derating (Ta)
(See Note 2)
1.6
1.4
1.2
1
1.6
1.4
1.2
1
1.6
1.4
1.2
1
60°C
60°C
60°C
70°C
85°C
70°C
70°C
85°C
85°C
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
16
19
22
25
28
31
34
37
40
9
12
15
18
21
24
27
30
33
36
39
9
13
17
21
25
Vin (Volts)
Vin (Volts)
Vin (Volts)
Power Dissipation vs Output Current
Power Dissipation vs Output Current
Power Dissipation vs Output Current
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
2.5
2.0
1.5
1.0
0.5
0.0
Vin
Vin
7.0V
Vin
7.0V
14.0V
20.0V
25.0V
30.0V
35.0V
10.0V
15.0V
20.0V
25.0V
30.0V
10.0V
15.0V
20.0V
25.0V
30.0V
0.0
0.5
1.0
1.5
0.0
0.5
1.0
1.5
0.0
0.5
1.0
1.5
Iout (A)
Iout (A)
Iout (A)
Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)
3
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com