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| 型号： | A8732EEETR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 15/21页 |
| 文件大小： | 0K |
| 描述： | IC PHOTOFLASH CAP CHARGER 8DFN |
| 标准包装： | 1 |
| 应用： | 照相机闪光灯电容器充电器，Xenon |
| 电流 - 电源： | 50µA |
| 电源电压： | 1.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-UFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN/MLP（2x2） |
| 包装： | 标准包装 |
| 其它名称： | 620-1338-6 |
A8732
Ultra Small Mobile Phone Xenon Photoflash
Capacitor Charger with IGBT Driver
As soon as a sufficient voltage has built up at the output capaci-
tor, the IC enters Fast-Charging mode. In this mode, the next
switching cycle starts after the secondary side current has stopped
flowing, and the switch voltage has dropped to a minimum value.
A proprietary circuit is used to allow minimum-voltage switch-
ing, even if the SW pin voltage does not drop to 0 V. This enables
Fast-Charging mode to start earlier, thereby reducing the overall
charging time. Minimum-voltage switching is shown in figure 4.
During Fast-Charging mode, when V OUT is high enough (over
50 V), true zero-voltage switching (ZVS) is achieved. This
further improves efficiency as well as reduces switching noise. A
ZVS interval is shown in figure 5.
C4
I SW
C4
I SW
C2,C3
V SW
V BAT
C2,C3
V SW
V BAT
V OUT
V OUT
C1
Figure 4. Minimum-voltage switching: V OUT ≥ 35 V, V BAT = 5.5 V,
Ch1: V OUT = 20 V / div., Ch2: V BAT = 5 V / div., Ch3: V SW = 5 V / div.,
Ch4: I SW = 500 mA / div., t = 1 μ s / div.
C1
Figure 5. True zero-voltage switching (ZVS): V OUT = 75 V, V BAT = 5.5 V,
Ch1: V OUT = 20 V / div., Ch2: V BAT = 5 V / div., Ch3: V SW = 5 V / div.,
Ch4: I SW = 500 mA / div., t = 0.5 μ s / div.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
14
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| A8733EEJTR-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 |
| A8735 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Ultra Small Mobile Phone Xenon Photoflash Capacitor Charger with IGBT Driver |
| A8735EEETR-T | 功能描述:IC PHOTOFLASH CAP CHARGER 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:热电冷却器 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:28-SOIC（0.173"，4.40mm 宽）裸露焊盘 供应商设备封装:28-TSSOP 裸露焊盘 包装:管件 产品目录页面:1410 (CN2011-ZH PDF) |
| A8737EEJTR-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:- 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 |
| A87386-000 | 制造商:TE Connectivity 功能描述:V2-2.5-5-SP-SM - Bulk |
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