參數(shù)資料
型號(hào)： LM2588T-12/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 9.5 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PSFM7
封裝： LEAD FREE, BENT STAGGERED, TO-220, 7 PIN
文件頁(yè)數(shù)： 13/30頁(yè)
文件大?。?/td> 1280K
代理商： LM2588T-12/NOPB
Typical Flyback Regulator Applications (Continued)
Step-Up (Boost) Regulator
Operation
Figure 33 shows the LM2588 used as a step-up (boost)
regulator. This is a switching regulator that produces an
output voltage greater than the input supply voltage.
A brief explanation of how the LM2588 Boost Regulator
works is as follows (refer to Figure 33). 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
IN, discharging
its current through diode (D) into the output capacitor (C
OUT)
at a rate of (V
OUT VIN)/L. Thus, energy stored in the
inductor during the switch on time is transferred to the output
during 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 33), the LM2588 can be used to produce a
regulated output voltage that is greater than the applied input
voltage. The switching waveforms observed during the op-
eration of this circuit are shown in Figure 34. Typical perfor-
mance of this regulator is shown in Figure 35.
T4
01242048
Top View
FIGURE 32. Schott 67140930
01242049
FIGURE 33. 12V Boost Regulator
LM2588
www.national.com
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2588T-3.3 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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
LM2588T-3.3/NOPB 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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
LM2588T-5.0 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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
LM2588T-5.0/NOPB 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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
LM2588T50 制造商:Texas Instruments 功能描述:SWITCHING REG 5A 5.0V 2588 TO-220
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