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| 型号： | A8436EEJTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC PHOTOFLASH CHARGER 10-MLP |
| 标准包装： | 1 |
| 应用： | 照相机闪光灯电容器充电器 |
| 电流 - 电源： | 1.3mA |
| 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： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN/MLP（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1098-6 |
A8436
Photoflash Capacitor Charger with IGBT Driver
Features and Benefits
Description
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Power with 1 Li+ or 2 Alkaline/NiMH/NiCAD batteries
Adjustable output voltage
>75% efficiency
Three levels of switch current limit: 1.0, 1.2, 1.4 A
Fast charge time
Charge complete indication
Integrated IGBT driver with trigger
No primary-side Schottky diode needed
Low-profile packages
The A8436 is a highly integrated IC that charges photoflash
capacitors for digital and film cameras. It also features an
integrated IGBT driver that facilitates the flash discharge
function and saves board space.
To charge the photoflash capacitor, the A8436 integrates a
40 V, DMOS switch that drives the transformer in a flyback
topology, allowing optimized design with tight coupling and
high efficiency. A proprietary control scheme optimizes the
capacitor charging time. Low quiescent current and low
shutdown current further improve system efficiency and
extend battery life.
Packages:
TDFN/MLP (suffix EJ)
10-pin, 3 mm × 3 mm
0.75 mm nominal overall height
MSOP (suffix LZ)
10-pin, 3 mm × 3 mm
1.10 mm maximum overall height
Approximate Scale 1:1
Three levels of switch current limit are provided: 1.0, 1.2,
and 1.4 A. The level is determined by configuring the ILIM
pin as grounded, floating, or pulled up to IC supply voltage,
respectively.
The CHARGE pin enables the A8436 and starts the charging
of the output capacitor. When the designated output voltage
is reached, the A8436 stops the charging until the CHARGE
pin is toggled again. Pulling the CHARGE pin low stops
charging. The Dˉ Oˉ Nˉ Eˉ pin is an open-drain indicator of when
the designated output voltage is reached.
The A8436 can be used with two Alkaline/NiMH/NiCAD or one
single-cell Li+ battery connected to the transformer primary.
Connect the VIN pin to a 3.0 to 5.5 V supply, which can be
either the system rail or the Li+ battery, if used.
The A8436 is available in a very low profile (0.75 mm) 10-
terminal 3 mm ×3 mm MLP/TDFN package, making it ideal
for space-constrained applications, as well as an MSOP. They
are lead (Pb) free, with 100% matte-tin leadframe plating.
Typical Applications
V BATT
T1
V BIAS 3.0 to 5.5 V
Two Alkaline/NiMH/NiCAD or one Li+ battery
or 1.5 to 5.5 V
D1
V OUT
One Li+ battery
V BATT or 3.0 to 5.5 V
T1
D1
V OUT
R5
100 k
1.4 A
1.2 A (N.C.)
R4
10 k
VIN
ILIM
C1
0.1 μ F
SW
C2
4.7 μ F
R1
R2
COUT
R5
100 k
1.4 A
1.2 A (N.C.)
R4
10 k
VIN
ILIM
C1
0.1 μ F
C2
4.7 μ F
SW
R1
R2
COUT
1.0 A
FB
1.0 A
FB
DONE
A8436
R3
DONE
A8436
R3
CHARGE
CHARGE
R6
10 k
R7
10 k
TRIGGER
GND
IGBTDRV
To IGBT Gate
R6
10 k
R7
10 k
TRIGGER
GND
IGBTDRV
To IGBT Gate
Figure 1. Typical circuit with separate power supply to transformer
A8436-DS, Rev. 4
Figure 2. Typical circuit with single power supply
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A8437 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Mobile Phone Xenon Photoflash Capacitor Charger |
| A84377-000 | 制造商:TE Connectivity 功能描述:TXR66SJ00-3616BI - Bulk |
| A8437ECGLT | 功能描述:IC PHOTOFLASH CAP CHARGER WLCSP 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 |
| 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 |
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