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AFL12012DX/HB

更新时间： 2024-01-22 22:57:33

品牌	Logo	应用领域
英飞凌 - INFINEON		转换器
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11页	122K
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AFL12012DX/HB 数据手册

AFL50XXS Series

Table 1. Nominal Resistance of Cu Wire

General Application Information

The AFL50XXS series of converters are capable of pro-

viding large transient currents to user loads on demand.

Because the nominal input voltage range in this series is

relatively low, the resulting input current demands will be

correspondingly large. It is important therefore, that the line

impedance be kept very low to prevent steady state and

transient input currents from degrading the supply voltage

between the voltage source and the converter input. In

applications requiring high static currents and large tran-

sients, it is recommended that the input leads be made of

adequate size to minimize resistive losses, and that a good

quality capacitor of approximately100µfd be connected di-

rectly across the input terminals to assure an adequately

low impedance at the input terminals. Table I relates nomi-

nal resistance values and selected wire sizes.

Wire Size, AWG

Resistance per ft

24 Ga

22 Ga

20 Ga

18 Ga

16 Ga

14 Ga

12 Ga

25.7 mΩ

16.2 mΩ

10.1 mΩ

6.4 mΩ

4.0 mΩ

2.5 mΩ

1.6 mΩ

Incorporation of a 100 µfd capacitor at the input terminals

is recommended as compensation for the dynamic ef-

fects of the parasitic resistance of the input cable reacting

with the complex impedance of the converter input, and to

provide an energy reservoir for transient input current

requirements.

Figure VI. Problems of Parasitic Resistance in input Leads

(See text)

R _p

I_in

Vin

100

µfd

e _{s o u r c e}

Rtn

e _{Rt n}

I_{Rt n}

Case

Enable 1

Sync Out

Sync In

System Ground

www.irf.com

1...6 7 8910 11

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