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| 型号： | AFL12012S |
| 厂商： | International Rectifier |
| 英文描述： | HIGH RELIABILITY HYBRID DC/DC CONVERTERS |
| 中文描述： | 高可靠性的混合式DC / DC变换器 |
| 文件页数： | 9/11页 |
| 文件大小： | 137K |
| 代理商： | AFL12012S |
www.irf.com
9
AFL120XXS Series
General Application Information
The AFL120XXS 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 approximately100mfd be connected
directly 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.
Table 1. Nominal Resistance of Cu Wire
Wire Size, AWG
Resistance per ft
24 Ga
22 Ga
20 Ga
18 Ga
16 Ga
14 Ga
12 Ga
25.7 m
16.2 m
10.1 m
6.4 m
4.0 m
2.5 m
1.6 m
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)
Vin
Rtn
Case
Enable 1
Sync Out
Sync In
R
p
R
p
I
Rtn
I
in
e
source
System Ground
e
Rtn
100
μfd
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| AFL12012SW | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, MINIMUM SCREENING - Bulk |
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| AFL12012SW/ES | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, ENVIRONMENTAL SCREENING - Bulk |
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