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| 型号： | A8732EEETR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/21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
Features and Benefits
? Ultra small 2 × 2 DFN/MLP-8 package
? Low quiescent current draw (0.5 μ A max. in shutdown mode)
? Primary-side output voltage sensing; no resistor divider required
? Adjustable switch peak current limit up to 1.5 A with
single-wire programming through the CHARGE pin
? 1V logic (V HI (min)) compatibility
? Integrated IGBT driver with internal gate resistors
? Optimized for mobile phone, 1-cell Li+ battery applications
? Zero-voltage switching for lower loss
? >75% efficiency
? Charge complete indication
? Integrated 50 V DMOS switch with self-clamping
protection
Package: 8-pin DFN/MLP (suffix EE)
Description
The Allegro ? A8732 is a Xenon photoflash charger IC designed
to meet the needs of ultra low power, small form factor cameras,
particularly camera phones. By using primary-side voltage
sensing, the need for a secondary-side resistive voltage divider
is eliminated. This has the additional benefit of reducing leakage
currents on the secondary side of the transformer. To extend
battery life, the A8732 features very low supply current draw
(0.5 μ A max in shutdown mode). The switch current limit can
be programmed from 0.45 to 1.5 A, in 16 steps with single wire
interface, through the CHARGE pin.
The IGBT driver also has internal gate resistors for minimum
external component count. The charge and trigger voltage
logic thresholds are set at 1 V HI (min) to support applications
implementing low-voltage control logic.
The A8732 is available in an 8-contact 2 mm × 2 mm
DFN/MLP package with a 0.60 maximum overall package
height, and an exposed pad for enhanced thermal performance.
It is lead (Pb) free with 100% matte tin leadframe plating.
2 mm × 2 mm, 0.60 mm height
Not to scale
Typical Applications
Battery Input
2.3 to 5.5 V
VBAT
+
C1
C OUT
100 ?? F
315 V
Battery Input
1.5 to 5.5 V
VBAT
+
C1
C OUT
100 ?? F
315 V
VOUT Detect
SW
VOUT Detect
SW
VIN_VDRV
Control
VIN_VDRV
Control
C2
Block
I SW sense
C2
Block
I SW sense
VPULLUP
VPULLUP
CHARGE
DONE
100 k Ω
CHARGE
DONE
100 k Ω
VIN_VDRV
DONE
VIN_VDRV
DONE
TRIG
IGBT Driver
IGBT Gate
TRIG
IGBT Driver
IGBT Gate
GATE
GND
(A)
Figure 1. Typical applications: (A) with single battery supply and (B) with separate bias supply
8732-DS
GND
(B)
GATE
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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