Datasheet > QSB20048S05

QSB20048S05

更新时间： 2024-02-07 23:31:55

品牌	Logo	应用领域
XPPOWER		/
页数	文件大小	规格书
4页	368K
描述
75350 Watts QSB Series

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中文翻译

获取价格

数据手册

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QSB20048S05 数据手册

QSB150ꢀ350

Thermal Resistance Information

Derating Curve

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)

Typical R_ca

Air Flow Rate

Natural Convection

20 ft. / min (0.1 ms)

7.12 °C/W

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)

800 ft./min. (4.0 m/s)

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)

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

R_ca= Thermal resistance case to ambient

100

Ambient Temperature ,Ta (ºC)

Application Notes

Output Voltage Trim ꢀ QSB75 & QSB150 Series

Voltage trim up

Voltage trim down

Connect trim resistor Rtrim between Trim pin and -Sense pin.

Connect trim resistor Rtrim between Trim pin and +Sense pin

R1 Vr - Vf

R1 x (Vdes - Vr)

Vnom - Vdes

R2 + R3

R2 x R3

R2 + R3

R trim down =

- R2 (kΩ)

R trim up =

(kΩ)

Vdes - Vnom

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

Vr (V)

1.24

2.5

Vf (V)

0.46

0.0

R1(kΩ)

3.00

2.32

R2 (kΩ)

12.0

3.3

R3 (kΩ)

4.3

0.0

5.0 V

12.0 V

15.0 V

24.0 V

9.10

12.0

20.0

51.0

56.0

100.0

5.1

8.25

7.5

2.5

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.

5.11 Vnom (100 +

511

R trim up =

kΩ

10.22

511

R trim down =

- 10.22 kΩ

Where:

des -

Vnom

x 100

Where:

nom

nom - Vdes

x 100

nom

Value

QSB100/200

QSB350

1.225

1.24

09-Sept-14

1 2 34

中文翻译

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