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參數(shù)資料
| 型號： | LM828M5 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Switched Capacitor Voltage Converter |
| 中文描述： | SWITCHED CAPACITOR CONVERTER, 56 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 186K |
| 代理商： | LM828M5 |
Application Information
(Continued)
Low ESR Capacitor Manufacturers
(Continued)
Manufacturer
Murata
Taiyo Yuden
Tokin
Phone
Capacitor Type
(800)-831-9172
(800)-348-2496
(408)-432-8020
Ceramic chip capacitors
Ceramic chip capacitors
Ceramic chip capacitors
Other Applications
Paralleling Devices
Any number of LM828s can be paralleled to reduce the out-
put resistance. Each device must have its own pumping ca-
pacitor C
, while only one output capacitor C
is needed as
shown in Figure 3. The composite output resistance is:
Cascading Devices
Cascading the LM828s is an easy way to produce a greater
negative voltage (e.g. A two-stage cascade circuit is shown
in Figure 4).
If n is the integer representing the number of devices cas-
caded, the unloaded output voltage V
is (-nV
). The effec-
tive output resistance is equal to the weighted sum of each
individual device:
R
out
= nR
out_1
+ n/2 R
out_2
+ ... + R
out_n
This can be seen by first assuming that each device is 100
percent efficient. Since the output voltage is different on
each device the output current is as well. Each cascaded de-
vice sees less current at the output than the previous so the
R
voltage drop is lower in each device added. Note that,
the number of n is practically limited since the increasing of
n significantly reduces the efficiency, and increases the out-
put resistance and output voltage ripple.
DS100137-9
FIGURE 3. Lowering Output Resistance by Paralleling Devices
DS100137-10
FIGURE 4. Increasing Output Voltage by Cascading Devices
www.national.com
6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM828M5X | Banana Plug; Current Rating:15A; Body Material:Brass; Color:Black; Spring Material:Beryllium Copper; Operating Temperature Range :? F; Voltage Rating:5000V RoHS Compliant: Yes |
| LM828 | Switched Capacitor Voltage Converter |
| LM8342 | Programmable TFT VCOM Calibrator with Non-Volatile |
| LM8342SD | Programmable TFT VCOM Calibrator with Non-Volatile |
| LM8342SDX | Programmable TFT VCOM Calibrator with Non-Volatile |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM828M5/NOPB | 功能描述:電荷泵 SWITCHED CAPACITOR VOLTAGE CONVERTER RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| LM828M5/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter (DC-DC) IC |
| LM828M5-NOPB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM828 Switched Capacitor Voltage Converter |
| LM828M5X | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| LM828M5X/NOPB | 功能描述:電荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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