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| 型号： | A8437ECGLT |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 7/22页 |
| 文件大小： | 0K |
| 描述： | IC PHOTOFLASH CAP CHARGER WLCSP |
| 标准包装： | 24,000 |
| 应用： | 照相机闪光灯电容器充电器，Xenon |
| 电源电压： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-UFBGA，WLCSP |
| 供应商设备封装： | 12-WLCSP |
| 包装： | 带卷 (TR) |
A8437
Mobile Phone Xenon Photoflash Capacitor Charger
with IGBT Driver
Timing and IGBT Interlock Function
The two TRIGGER signals are internally ANDed together. As
shown in the timing diagram, below, triggering is prohibited dur-
ing the initial charging process. This prevents premature firing
VIN
CHARGE
SW
V OUT
DONE
of the flash before the output capacitor has been charged to its
target voltage. Refer to the section IGBT Gate Driver Interlock
for details.
A
B
C
D
TRIGGER
IGBTDRV
Case
A
B
C
D
IGBT Drive Timing Definition
Description
TRIGGER pulse arrives before first charging process is finished (CHARGE and
ˉDˉ ˉOˉ ˉNˉ ˉEˉ pins are both high). IGBTDRV is disabled in this case.
Arrives during regulation mode, while not refreshing. IGBTDRV is enabled.
Charging resumes once TRIGGER is low again.
Arrives during regulation mode, while refreshing. Charging is stopped after
present cycle. IGBTDRV is enabled. Charging resumes after TRIGGER is low
again.
Arrives while IC is in low-power Standby mode (CHARGE pin is low).
IGBTDRV is always enabled in this case.
TRIGGER
50%
50%
t Dr
t r
t Df
t f
GSOURCE,
GSINK,
or GATE
10%
90%
90%
10%
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
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| A8437EEJTR-T | 功能描述:IC PHOTOFLASH CAP CHARGER 10TDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| A8438 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Photoflash Capacitor Charger with IGBT Driver |
| A8438_06 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Photoflash Capacitor Charger with IGBT Driver |
| A8438_13 | 制造商:ALLEGRO 制造商全称: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 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
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