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| 型号： | A8732EEETR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 16/21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
ILIM Programming
Ultra Small Mobile Phone Xenon Photoflash
Capacitor Charger with IGBT Driver
current starts to ramp up to the set I SWLIM . The I SWLIM setting
The peak current limit can be programmed to sixteen differ-
ent levels, from 100% to 29%, with programming through the
CHARGE pin. An internal digital circuit decodes the input clock
signals, which sets the switch current limit. This flexible scheme
allows the user to operate the A8732 at required current limits.
The battery life can be effectively extended by setting a lower cur-
rent limit at low battery voltages. Figure 6 shows the ILIM clock
timing scheme protocol. The total ILIM setup time, t ILIM(SU) ,
denotes the time needed for the decoder circuit to receive ILIM
inputs and set I SWLIM , and has a typical duration of 200 μ s.
Figure 7 shows the timing definition of the primary current
limiting circuit. At the end of the setup period, t ILIM(SU) , primary
(0 to 15)
Figure 6. ILIM programming timing definition
remains in effect as long as the CHARGE pin is high. To reset the
ILIM decoder, pull the CHARGE pin low before clocking-in the
new setting.
After the first start-up or an ILIM decoder reset, each new current
limit can be set by sending a burst of pulses to the CHARGE
pin. The first rising edge starts the ILIM decoder, and up to 16
rising edges will be counted to set the ISWLIM level. The first
pulse width, t ILIM1(H) , must be at least 15 μ s long. Subsequent
pulses (up to 15 more) can be as short as 0.2 μ s. The last low-
to-high edge must arrive within 200 μ s from the first edge. The
CHARGE pin will stay high afterwards.
Figure 7. Current limit timing example (I SWLIM4 selected)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
15
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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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