參數(shù)資料
型號: ALT01C48-N8
元件分類: 電源模塊
英文描述: 1-OUTPUT 25.05 W DC-DC REG PWR SUPPLY MODULE
文件頁數(shù): 9/28頁
文件大小: 338K
代理商: ALT01C48-N8
ALT Series Technical Reference Note
DATE: Feb. 18, 2003
MODEL : ALT
Series
S 17 / 28
Minimum Load Requirements
Parameter
Device
Symbol
Typ
Unit
Minimum Load
3.3V
5V
12V
15V
IMIN
0
0.21
0.167
A
Output Over-current Protection
ALT series DC/DC converters feature foldback current limiting as part of their Over-current
Protection (OCP) circuits. When output current exceeds 110 to 140% of rated current, such
as during a short circuit condition, the module will work on intermittent mode, also can
tolerate short circuit conditions infinitely. When the over-current condition is removed, the
converter will automatically restart.
Output Filters
When the load is sensitive to ripple and noise, an output filter can be added to minimize the
effects. A simple output filter to reduce output ripple and noise can be made by connecting a
capacitor C1 across the output as shown in Figure ‘Output Ripple Filter’. The recommended
value for the output capacitor C1 is 220
F.
Extra care should be taken when long leads or traces are used to provide power to the load.
Long lead lengths increase the chance for noise to appear on the lines. Under these
conditions C2 can be added across the load, with a 0.47
F ceramic capacitor C2 in parallel
generally as shown in Figure ‘Output Ripple Filter for a Distant Load’.
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