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參數(shù)資料
| 型號： | A8439EEJTR-T |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Photoflash Capacitor Charger with IGBT Driver and Refresh |
| 中文描述： | 照相閃光燈電容充電器與IGBT驅(qū)動器和刷新 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大小： | 537K |
| 代理商： | A8439EEJTR-T |
A8439-DS, Rev. 1
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Photoflash Capacitor Charger with IGBT Driver
A8439
9
Figure 7 shows the last charging cycle, when the CHARGE pin is
forced low before charging has been completed.
The A8439 implements an adaptive off-time, t
OFF
, control.
After the switch is turned off, a sensing circuit tracks the flyback
voltage at the SW node. As soon as this voltage swings below
1.2 V, the switch is turned on again for the next charging cycle.
However, when the photoflash capacitor charger circuit starts
up at low output voltage, a timeout may be triggered to limit the
maximum switch off-time to 20
μ
s.
Figure 7. Last charging cycle, when the CHARGE pin is forced low before
charging is complete.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| A843DSC | 制造商:Pentair Technical Products / Hoffman 功能描述:Enclosure, Junction Box, 8.00x4.00x2.75in, Flat Cover, NEMA 4, Mild Steel 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE JUNCTION BOX STEEL GRAY 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE, JUNCTION BOX, STEEL, GRAY 制造商:Hoffman Enclosures 功能描述:SCREW COVER DSC ENCLOSURE8 X 4 X 2.75 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE, JUNCTION BOX, STEEL, GRAY, Enclosure Type:Junction Box, Enclosure Mat 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE, JUNCTION BOX, STEEL, GRAY, Enclosure Type:Junction Box, Enclosure Material:Steel, Body Color:Grey, External Height - Imperial:8", External Height - Metric:203mm, External Width - Imperial:4", External Width - Metric:102mm , RoHS Compliant: Yes |
| A844 | 制造商:TE Connectivity 功能描述:- Bulk |
| A8447 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:High Voltage Step Down Regulator |
| A8447SLJ-T | 制造商:Allegro MicroSystems LLC 功能描述:HIGH VOLTAGE STEP DOWN REGULATOR |
| A8447SLJTR-T | 功能描述:IC REG BUCK ADJ 3A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:MIC23xxx HyperLight Load™ Regulators 標(biāo)準(zhǔn)包裝:5,000 系列:HyperLight Load® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.8V 輸入電壓:2.7 V ~ 5.5 V PWM 型:混合物 頻率 - 開關(guān):4MHz 電流 - 輸出:2A 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤，8-MLF? 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-MLF?（2x2） 產(chǎn)品目錄頁面:1094 (CN2011-ZH PDF) 其它名稱:576-3303-2 |
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