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参数资料
| 型号： | RS5RJ5720A-T1 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 稳压器 |
| 英文描述： | 0.25 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SOP-8 |
| 文件页数： | 27/29页 |
| 文件大小： | 574K |
| 代理商： | RS5RJ5720A-T1 |
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RS5RJ
OPERATION OF STEP-UP DC/DC CONVERTER
Step-up DC/DC Converter charges energy in the inductor when Lx Transistor (LxTr) is ON, and discharges the
energy with the addition of the energy from Input Power Source thereto when LxTr is off, so that a higher output
voltage than the input voltage is obtained.
The operation will be explained with reference to the following diagrams:
< Current through L >
< Basic Circuits >
i2
SD
LX Tr
i1
L
CL
VIN
IOUT
VOUT
IL
IL min
IL max
topen
ton
toff
t
T=1/ fosc
Step.1 : LxTr is turned on and current IL (= i1 ) flows, so that energy is charged in L. At this moment, IL(=i1 ) is
increased from ILmin (= 0) to reach ILmax in proportion to the on-time period (ton) of LxTr.
Step.2 : When LxTr is turned off, Schottky diode (SD) is turned on in order that L maintains IL at ILmax, so that
current IL (= i2) is released.
Step.3 : IL (=i2) is gradually decreased, and in the case of discontinuous mode, IL reaches ILmin (=0) after a time
period of topen, so that SD is turned off.
In the case of the VFM control system, with the on-time period (ton) maintained constant, the output voltage
is maintained constant by controlling the oscillator frequency (fosc).
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相关代理商/技术参数 |
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|---|---|
| RS5RJXXXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Management ICs |
| RS5RM | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3027A | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3027A-T1 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3027A-T2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
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