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參數(shù)資料
| 型號： | LM2586SX-3.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER 3A Flyback Regulator with Shutdown |
| 中文描述： | 3 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PSSO7 |
| 封裝： | TO-263, 7 PIN |
| 文件頁數(shù)： | 18/28頁 |
| 文件大?。?/td> | 778K |
| 代理商： | LM2586SX-3.3 |
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Typical Flyback Regulator Applications
(Continued)
Step-Up (Boost) Regulator Operation
Figure 30 shows the LM2586 used as a step-up (boost)
regulator. This is a switching regulator that produces an out-
put voltage greater than the input supply voltage.
A brief explanation of how the LM2586 Boost Regulator
works is as follows (refer to Figure 30). When the NPN
switch turns on, the inductor current ramps up at the rate of
V
IN
/L, storing energy in the inductor. When the switch turns
off, the lower end of the inductor flies above V
, discharging
its current through diode (D) into the output capacitor (C
)
at a rate of (V
V
)/L. Thus, energy stored in the induc-
tor during the switch on time is transferred to the output dur-
ing the switch off time. The output voltage is controlled by
adjusting the peak switch current, as described in the flyback
regulator section.
By adding a small number of external components (as shown in Figure 30), the LM2586 can be used to produce a regulated out-
put voltage that is greater than the applied input voltage. The switching waveforms observed during the operation of this circuit
are shown in Figure 31 Typical performance of this regulator is shown in Figure 32
T7
DS012516-47
Top View
FIGURE 27. Schott 26606
T6
DS012516-49
Top View
FIGURE 28. Schott 67140900
T5
DS012516-50
Top View
FIGURE 29. Schott 67140890
DS012516-51
FIGURE 30. 12V Boost Regulator
www.national.com
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PDF描述 |
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| LM2586S-5.0 | SIMPLE SWITCHER 3A Flyback Regulator with Shutdown |
| LM2586T-12 | SIMPLE SWITCHER 3A Flyback Regulator with Shutdown |
| LM2586T-ADJ | SIMPLE SWITCHER 3A Flyback Regulator with Shutdown |
| LM2586T-5.0 | SIMPLE SWITCHER 3A Flyback Regulator with Shutdown |
| LM2586T-3.3 | SIMPLE SWITCHER 3A Flyback Regulator with Shutdown |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2586SX-5.0 | 功能描述:直流/直流開關轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2586SX-5.0/NOPB | 功能描述:直流/直流開關轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2586SX-ADJ | 功能描述:直流/直流開關轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2586SX-ADJ/NOPB | 功能描述:直流/直流開關轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2586T-12 | 制造商:Texas Instruments 功能描述: |
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