參數(shù)資料
型號(hào)： R1221N49AD
廠商： Ricoh Co., Ltd.
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： Voltage-Mode SMPS Controller
中文描述： 電壓模式開(kāi)關(guān)電源控制器
文件頁(yè)數(shù)： 2/21頁(yè)
文件大小： 218K
代理商： R1221N49AD
12345
Rev. 1.11 - 2 -
n
BLOCK DIAGRAM
OSC
V
IN
EXT
GND
V
OUT
Vref
Vref
CE
Chip Enable
Soft Start
Protection
PWM/VFM
CONTROL
VD
OUT
n
SELECTION GUIDE
In the R1221N Series, the output voltage, the detector threshold, the oscillator frequency, the optional
function, and the taping type for the ICs can be selected at the user’s request.
The selection can be made by designating the part number as shown below;
R1221NXXXX-TR
-
-
-
a
b c
Code
a
Contents
Setting Output Voltage(V
OUT
):
Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.
Setting Detector Threshold(-V
DET
)
Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V is possible.
A:3.0V
Designation of Oscillator Frequency and Optional Function
A:300kHz, with a PWM/VFM alternative circuit, Latch-type protection
B:500kHz, with a PWM/VFM alternative circuit, Latch-type protection
C:300kHz, without a PWM/VFM alternative circuit, Latch-type protection
D:500kHz, without a PWM/VFM alternative circuit, Latch-type protection
E:300kHz, with a PWM/VFM alternative circuit, Reset-type protection
F:500kHz, with a PWM/VFM alternative circuit, Reset-type protection
G:300kHz, without a PWM/VFM alternative circuit, Reset-type protection
H:500kHz, without a PWM/VFM alternative circuit, Reset-type protection
b
c
相關(guān)PDF資料
PDF描述
R1221N49AD-TR Voltage-Mode SMPS Controller
R1221N49AE Voltage-Mode SMPS Controller
R1221N49AE-TR Voltage-Mode SMPS Controller
R1221N49AF Voltage-Mode SMPS Controller
R1221N49AF-TR Voltage-Mode SMPS Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
R1221N49AD-TR 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Voltage-Mode SMPS Controller
R1221N49AE 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Voltage-Mode SMPS Controller
R1221N49AE-TR 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Voltage-Mode SMPS Controller
R1221N49AF 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Voltage-Mode SMPS Controller
R1221N49AF-TR 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Voltage-Mode SMPS Controller
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