- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367562 > LM2698MM-ADJ (NATIONAL SEMICONDUCTOR CORP) SIMPLE SWITCHER 1.35A Boost Regulator PDF資料下載
參數(shù)資料
| 型號(hào)： | LM2698MM-ADJ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER 1.35A Boost Regulator |
| 中文描述： | 2.4 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | PLASTIC, MSOP-8 |
| 文件頁(yè)數(shù)： | 11/17頁(yè) |
| 文件大?。?/td> | 503K |
| 代理商： | LM2698MM-ADJ |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)當(dāng)前第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)
Operation
(Continued)
The goal of the compensation network is to provide the best
static and dynamic performance while insuring stability over
line and load variations. The relationship of stability and
performance can be best analyzed by plotting the magnitude
and phase of the open loop frequency response in the form
of a bode plot. A typical bode plot of the LM2698 open loop
frequency response is shown in Figure 5
Poles are marked with an ’X’, and zeros are marked with a
’O’. The bolded ’
O
’ labeled ’f
’ is a right-half plane zero.
Right half plane zeros act like normal zeros to the magnitude
(+20dB/decade slope influence) and like poles to the phase
(90 shift). Three curves are shown. The powerstage curve
is the frequency response of the powerstage, which includes
the switch, diode, inductor, output capacitor, and load. The
compensator curve is the frequency response of the com-
pensator, which is the error amp combined with the compen-
sation network. T is the product of the powerstage and the
compensator and is the complete open loop frequency re-
sponse. The power stage response is fixed by line and load
constraints, while the compensator is set by the external
compensation network at pin 1. The compensator can be
designed in a few simple steps as follows.
Quick Compensator Design
Calculate:
where,
where R
OUT
= 875k
Choose C
C1
= 4.7nF
Choose
Where,
20012657
FIGURE 5. Bode plot of the LM2698 Frequency Response using the Typical Application Circuit
L
www.national.com
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2902D | Advanced LinCMOS(TM) Low-Noise Chopper-Stabilized Operational Amplifier 8-SOIC |
| LM2902 | Low power quad op amps(低功耗四運(yùn)算放大器) |
| LM224 | Low power quad op amps(低功耗四運(yùn)算放大器) |
| LM2902N | LinCMOS(TM) Programmable Low-Power Operational Amplifier 8-SOIC 0 to 70 |
| LM2902N | LinCMOS(TM) Programmable Low-Power Operational Amplifier 8-PDIP 0 to 70 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2698MM-ADJ/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1.35A BOOST REG RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2698MM-ADJ/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| LM2698MMX-ADJ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM2698MMX-ADJ/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| LM26C1M5_-RPA | 制造商:National Semiconductor Corporation 功能描述: 制造商:Texas Instruments 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。