參數(shù)資料
型號(hào)： A8438
廠商： Allegro MicroSystems, Inc.
英文描述： Photoflash Capacitor Charger with IGBT Driver
中文描述： 照相閃光燈電容充電器采用IGBT驅(qū)動(dòng)器
文件頁數(shù)： 10/13頁
文件大?。?/td> 528K
代理商： A8438
A8438-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
A8438
10
When the A8438 charges a fully-discharged photoflash capacitor,
I
Secondary
decreases very slowly due to the low initial V
OUT
. The
A8438 internal timer (Timer mode) sets a maximum timeframe of
18
μ
s for the off-time as long as the SW node voltage is greater
than 1.2 V. When the off-time passes 18
μ
s, the internal MOSFET
switch is turned on, initiating the next charging cycle .
Input Current Limiting
The peak input current, I
SWLIM
, can be set to three levels by
configuring the ILIM pin:
I
SWLIM
Setting
(A)
1.6
1.8
ILIM Pin
Connection
External ground
Float
Pull up to IC supply voltage
with a 1 to 10 k
Ω
resistor
2.0
Lower input current offers the advantage of a longer battery
lifetime. For faster charging time, however, use the highest
current limit. I
SWLIM
may be adjusted during charging.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A8438_06 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Photoflash Capacitor Charger with IGBT Driver
A8438_13 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Photoflash Capacitor Charger with IGBT Driver
A8438EEJTR-T 功能描述:IC PHOTOFLASH CHARGER 10-MLP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 應(yīng)用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件
A8439 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Photoflash Capacitor Charger with IGBT Driver and Refresh
A8439EEJTR-T 功能描述:IC CHARGER PHOTO FLASH 10-MLP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
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