參數(shù)資料
型號(hào)： RV5VH301E2
英文描述： SMPS Controller
中文描述： 開關(guān)電源控制器
文件頁數(shù)： 40/47頁
文件大小： 384K
代理商： RV5VH301E2
39
RV5VH3
××
DC/DC Converter 2
The DC/DC2 can operate by an input voltage to the V
DD
pin. A change in the V
OUT2
will feed back to the internal error
amplifier through external voltage setting resistors. The V
REF
voltage should be provided from externally fixed power sup-
ply such as V
OUT1
.
When the feed back voltage to the Error Amp.2 is higher than the ground voltage, the error amplifier enables oscillation
otherwise, it will stop oscillation.
Pulses from the “OSC” circuit have a duty cycle of 50% and it makes VFM operation allowable.
There might be certain cases that the duty cycles become smaller temporarily at light load current. The output of “EXT2”
is driven by CMOS buffer operated V
DD
and GND.
A PMOS driver will be connected to the “EXT2” pin and its switching operation generates negative output voltage through
energy accumulated in an inductor.
The DC/DC1 can be shut down by CSW pin. When the CSW pin is High, V
DD
level, the DC/DC1 is enabled and when the
CSW pin is “L”, GND level, the DC/DC1 is disabled. The EXT2 pin outputs “H” while the DC/DC2 is disabled.
Set Output Voltage DC/DC 2
V
OUT2
is described as follows:
V
REF
: R1=|–V
OUT2
| : R2
|–V
OUT2
|=V
REF
×
R2/R1,
The FB2 voltage is controlled to 0V and V
REF
is provided externally
thus, any output voltage of DC/DC2 can be set by R1 and R2.
Certain temperature coefficient of V
OUT2
can be set by using R1, R2 having such temperature characteristics.
C1
L
FB2
V
OUT2
V
DD
EXT2
+
–
RV5VH3
××
Error Amp.2
VFM2
CSW
6
1
7
SBD
+
PMOS
OSC
C2
R2
R1
V
REF
相關(guān)PDF資料
PDF描述
RV5VH302E1 SMPS Controller
RV5VH302E2 SMPS Controller
RV5VH303E1 SMPS Controller
RV5VH303E2 SMPS Controller
RV5VH3XX Power Management ICs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
RV5VH302-E1 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:DC/DC CONVERTER CONTROLLER
RV5VH302E2 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller
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