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參數(shù)資料
| 型號： | LM2661 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Switched Capacitor Voltage Converter |
| 中文描述： | 開關(guān)電容電壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 296K |
| 代理商： | LM2661 |
Other Applications
(Continued)
CASCADING DEVICES
Cascading the LM2660s (or LM2661s) is an easy way to produce a greater negative voltage (as shown in Figure 5). If n is the
integer representing the number of devices cascaded, the unloaded output voltage V
out
is (nV
in
). The effective output resistance
is equal to the weighted sum of each individual device:
A three-stage cascade circuit shown in Figure 6 generates 3V
in
, from V
in
.
Cascading is also possible when devices are operating in doubling mode. In Figure 7 two devices are cascaded to generate 3V
in
.
An example of using the circuit in Figure 6 or Figure 7 is generating +15V or 15V from a +5V input.
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.
DS012911-23
FIGURE 5. Increasing Output Voltage by Cascading Devices
DS012911-24
FIGURE 6. Generating 3V
in
from +V
in
DS012911-25
FIGURE 7. Generating +3V
in
from +V
in
L
www.national.com
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| LM2661MM | Switched Capacitor Voltage Converter |
| LM2661M | Switched Capacitor Voltage Converter |
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| LM2663M | Switched Capacitor Voltage Converter |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2661/3/4EVAL | 功能描述:電源管理IC開發(fā)工具 LM2661/3/4 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM2661/3/4EVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM2661/3/4 EVAL BRD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM2661A E WAF | 制造商:Texas Instruments 功能描述: |
| LM2661AM E WAF | 制造商:Texas Instruments 功能描述: |
| LM2661M | 制造商:Texas Instruments 功能描述:Charge Pump INV/STPUP -1.5V to -5.5V 120mA 8-Pin SOIC N Rail |
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