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參數(shù)資料
| 型號： | R1282D002A |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | 2CH PWM DC/DC CONTROLLER |
| 中文描述： | 2聲道的PWM DC / DC控制器 |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 327K |
| 代理商： | R1282D002A |
R1282D002A
7
In this moment, the peak current, IL
X
max flowing through the inductor and the driver Tr. is described as
follows:
IL
X
max
=
Iconst
+
V
IN
×
Ton/L...........................................................................................Formula 7
With the formula 4,6, and IL
X
max is,
IL
X
max
=
V
OUT
/V
IN
×
I
OUT
+
V
IN
×
Ton/(2
×
L)...........................................................................Formula 8
Therefore, peak current is more than I
OUT
. Considering the value of IL
X
max, the condition of input and output,
and external components should be selected.
In the formula 7, peak current IL
X
max at discontinuous mode can be calculated. Put Iconst
=
0 in the formula.
The explanation above is based on the ideal calculation, and the loss caused by L
X
switch and external
components is not included. The actual maximum output current is between 50% and 80% of the calculation.
Especially, when the IL
X
is large, or V
IN
is low, the loss of V
IN
is generated with the on resistance of the switch. As
for V
OUT
, Vf (as much as 0.3V) of the diode should be considered.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R1282D002A-TR | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:2CH PWM DC/DC CONTROLLER |
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