- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358822 > LM2587 (National Semiconductor Corporation) Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs 20-TSSOP -40 to 85 PDF資料下載
參數(shù)資料
| 型號： | LM2587 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs 20-TSSOP -40 to 85 |
| 中文描述： | 5A條激的SIMPLE SWITCHER穩(wěn)壓器 |
| 文件頁數(shù)： | 18/26頁 |
| 文件大小： | 676K |
| 代理商： | LM2587 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁
Step-Up (Boost) Regulator Operation
Figure 33 shows the LM2587 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 LM2587 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
, 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.
Typical Performance Characteristics
DS012316-19
By adding a small number of external components (as shown in Figure 33), the LM2587 can be used to produce a regulated output voltage that is greater than
FIGURE 33. 12V Boost Regulator
DS012316-20
A: Switch Voltage, 10 V/div
100 mV/div, AC-Coupled
Horizontal: 2 μs/div
FIGURE 34. Switching Waveforms
www.national.com
18
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2588SX-5.0 | SIMPLE SWITCHER 5A Flyback Regulator with |
| LM2588S-12 | Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs 20-TSSOP -40 to 85 |
| LM2588S-3.3 | SIMPLE SWITCHER 5A Flyback Regulator with |
| LM2588S-ADJ | Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs 20-TSSOP -40 to 85 |
| LM2588T-ADJ | SIMPLE SWITCHER 5A Flyback Regulator with |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2587EVAL | 功能描述:電源管理IC開發(fā)工具 EVAL BOARDFOR LM2587 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 |
| LM2587S-12 | 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 |
| LM2587S-12/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 |
| LM2587S-3.3 | 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 |
| LM2587S-3.3/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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。