- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373332 > RV5VH301E1 SMPS Controller PDF資料下載
參數(shù)資料
| 型號： | RV5VH301E1 |
| 英文描述： | SMPS Controller |
| 中文描述： | 開關電源控制器 |
| 文件頁數(shù)： | 23/47頁 |
| 文件大?。?/td> | 384K |
| 代理商： | RV5VH301E1 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁當前第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁
RV5VH1
××
/RV5VH2
××
22
The above explanation is directed to the calculation in an ideal case where it is supposed that there is no
energy loss in the external components and LxSW. In an actual case, the maximum output current will be 50
to 80% of the above calculated maximum output current. In particular, care must be taken because V
IN
is
decreased in an amount corresponding to the voltage reduction caused by LxSW when IL is large or V
IN
is
small. Furthermore, It is required that with respect to V
OUT
, Vf of the diode (about 0.3V in the case of a
Schottky type diode) be taken into consideration.
When I
LX
and V
LX
exceed their respective ratings, use the RV5VH with the attachment of an external tran-
sistor with a low saturation voltage thereto.
HINTS
When LxTr is on, the energy P
ON
charged in the inductor is provided by Equation 2 as follows :
P
ON
=
∫
0
ton
(V
IN
· IL (t)) dt=
∫
=V
IN
2
· ton
2
/(2 · L)....................................................................................................Equation 2
ton
(V
IN
2
· t/L) dt
In the case of the step-up DC/DC converter, the energy is also supplied from the input power source at the time
of OFF.
Thus, P
OFF
=
∫
0
topen
(V
IN
· IL (t)) dt=
∫
0
=V
IN
· (V
OUT
–V
IN
) · topen
2
/(2 · L)
topen
(V
IN
· (V
OUT
–V
IN
) · t/L)dt
Here, topen=V
IN
· ton/(V
OUT
–V
IN
) from Equation 1, and when this is substituted into the above equation.
=V
IN
3
· ton
2
/(2 · L · (V
OUT
–V
IN
))............................................................................Equation 3
Input power P
IN
is (P
ON
+P
OFF
)/T. When this is converted in its entirely to the output.
P
IN
=(P
ON
+P
OFF
)/T=V
OUT
· I
OUT
=P
OUT
.........................................................................Equation 4
Equation 5 can be obtained as follows by solving Equation 4 for I
OUT
by substituting Equation 2 and 3 into
Equation 4 :
I
OUT
=V
IN
2
· ton
2
/(2· L· T· (V
OUT
–V
IN
)
=V
IN
2
· maxdty
2
/(20000 · fosc· L· (V
OUT
–V
IN
))...................................................Equation 5
The peak current which flows through L· LxTr · SD is
ILmax=V
IN
· ton/L..........................................................................................................Equation 6
Therefore, it is necessary that the setting of the input/output conditions and the selection of peripheral compo-
nents be made with ILmax taken into consideration.
SELECTION OF PERIPHERAL COMPONENTS
相關PDF資料 |
PDF描述 |
|---|---|
| RV5VH301E2 | SMPS Controller |
| RV5VH302E1 | SMPS Controller |
| RV5VH302E2 | SMPS Controller |
| RV5VH303E1 | SMPS Controller |
| RV5VH303E2 | SMPS Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| RV5VH301-E1 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:DC/DC CONVERTER CONTROLLER |
| RV5VH301E2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller |
| RV5VH301-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:DC/DC CONVERTER CONTROLLER |
| RV5VH302 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:DC/DC CONVERTER CONTROLLER |
| RV5VH302E1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller |
發(fā)布緊急采購，3分鐘左右您將得到回復。