QSB10024S05 Просмотр технического описания (PDF) - XP Power Limited
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Компоненты Описание
производитель
QSB10024S05 Datasheet PDF : 4 Pages
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Thermal Resistance Information
QSB150 350
Derating Curve
50
45
40
35
30
25
20
15
10
5
0
0
Maximum Power Dissipation vs Ambient Temperature and Air Flow without heatsink
Natural Convection
20 ft./min. (0.1 m/s)
100 ft./min. (0.5 m/s)
200 ft./min. (1.0 m/s)
300 ft./min. (1.5 m/s)
400 ft./min. (2.0 m/s)
500 ft./min. (2.5 m/s)
600 ft./min. (3.0 m/s)
700 ft./min. (3.5 m/s)
10 20 30 40 50 60 70 80 90 100
Ambient Temperature ,Ta (ºC)
800 ft./min. (4.0 m/s)
Air Flow Rate
Natural Convection
20 ft. / min (0.1 ms)
100 ft./min (0.5 ms)
200 ft./min (1.0 ms)
300 ft./min (1.5 ms)
400 ft./min (2.0 ms)
500 ft./min (2.5 ms)
600 ft./min (3.0 ms)
700 ft./min (3.5 ms)
800 ft./min (4.0 ms)
Typical Rca
7.12 °C/W
6.21 °C/W
5.17 °C/W
4.29 °C/W
3.64 °C/W
2.96 °C/W
2.53 °C/W
2.37 °C/W
2.19 °C/W
Rca = Thermal resistance case to ambient
Application Notes
Output Voltage Trim QSB75 & QSB150 Series
Voltage trim up
Connect trim resistor Rtrim between Trim pin and -Sense pin.
Voltage trim down
Connect trim resistor Rtrim between Trim pin and +Sense pin
R trim up =
R1 Vr - Vf
R2
R2 + R3
Vdes - Vnom
-
R2
R2
x R3
+ R3
(kΩ)
R trim down = R1 x (Vdes - Vr) - R2 (kΩ)
Vnom - Vdes
Where: R trim up/down is the external resistor in kΩ. Vnom is the nominal output voltage. Vdes is the desired output voltage. R1, R2, R3 and Vr
are internal to the unit and are defined in the table below.
Output Voltage (V)
3.3 V
5.0 V
12.0 V
15.0 V
24.0 V
R1(kΩ)
3.00
2.32
9.10
12.0
20.0
R2 (kΩ)
12.0
3.3
51.0
56.0
100.0
R3 (kΩ)
4.3
0.0
5.1
8.25
7.5
Vr (V)
1.24
2.5
2.5
2.5
2.5
Vf (V)
0.46
0.0
0.46
0.46
0.46
Output Voltage Trim QSB100, QSB200 & QSB350 Series
Voltage trim down - Connect trim resistor Rtrim between Trim pin
and –Sense pin
Voltage trim up - Voltage trim up, Connect trim resistor
Rtrim between Trim pin and +Sense pin.
R trim down =
511
%
-
10.22
kΩ
Where:
%=
Vnom - Vdes
Vnom
x 100
R trim up = 5.11 Vnom (100 +
kx %
%) -
511 - 10.22
%
kΩ
Where:
%=
Vdes - Vnom
Vnom
x 100
Value
k
QSB100/200
1.225
QSB350
1.24
31-March-14
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