音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

A8438_06 Datasheet

  • A8438_06

  • Photoflash Capacitor Charger with IGBT Driver

  • 15頁(yè)

  • ALLEGRO   ALLEGRO

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

A8438
Photoflash Capacitor Charger with IGBT Driver
Features and Benefits
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
Power with 1 Li+ or 2 Alkaline/NiMH/NiCAD batteries
Adjustable output voltage
>75% efficiency
Three levels of switch current limit: 1.6, 1.8, 2.0 A
Fast charge time
Charge complete indication
Integrated IGBT driver with trigger
No primary-side Schottky diode needed
Low-profile package (0.75 mm nominal height)
Description
The A8438 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 A8438 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.
Three levels of switch current limit are provided: 1.6, 1.8,
and 2.0 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 A8438 and starts the charging
of the output capacitor. When the designated output voltage
is reached, the A8438 stops the charging until the CHARGE
pin is toggled again. Pulling the CHARGE pin low stops
charging. The DONE pin is an open-drain indicator of when
爐爐爐爐
爐 爐 爐爐
the designated output voltage is reached.
Package: 10 pin TDFN/MLP (suffix EJ)
Approximate Scale 1:1
The A8438 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 A8438 is available in a very low profile (0.75 mm) 10-
terminal 3脳3 mm MLP/TDFN package, making it ideal for
space-constrained applications. It is lead (Pb) free, with 100%
matte-tin leadframe plating.
Typical Applications
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
BATT
V
OUT
T1
+
C1
0.1 渭F
C2
4.7 渭F
One Li+ battery
V
BATT
or 3.0 to 5.5 V
T1
D1
V
OUT
R1
R2
R5
100 k
2.0 A
1.8 A (N.C.)
1.6 A
10 k
R4
COUT
R5
100 k
2.0 A
1.8 A (N.C.)
10 k
R4
C1
0.1 渭F
C2
4.7 渭F
R1
R2
COUT
VIN
ILIM
DONE
CHARGE
SW
FB
VIN
ILIM
DONE
CHARGE
SW
FB
A8438
IGBTDRV
GND
R3
1.6 A
A8438
IGBTDRV
GND
R3
R6
10 k
TRIGGER
R7
To IGBT Gate
10 k
R6
10 k
TRIGGER
R7
To IGBT Gate
10 k
Figure 1. Typical circuit with separate power supply to transformer
A8438-DS, Rev. 2
Figure 2. Typical circuit with single power supply

A8438_06相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    White LED Driver Constant Current Step-up Converter
    ALLEGRO
  • 英文版
    White LED Driver Constant Current Step-up Converter
    ALLEGRO [A...
  • 英文版
    White LED Driver Constant Current Step-up Converter
    ALLEGRO
  • 英文版
    White LED Driver Constant Current Step-up Converter
    ALLEGRO [A...
  • 英文版
    6-Channel High Efficiency Charge Pump White LED Driver
    ALLEGRO
  • 英文版
    6-Channel High Efficiency Charge Pump White LED Driver
    ALLEGRO [A...
  • 英文版
    High Efficiency Charge Pump White LED Driver
    ALLEGRO
  • 英文版
    High Efficiency Charge Pump White LED Driver
    allegromicro
  • 英文版
    Photoflash Capacitor Charger with IGBT Driver
    ALLEGRO
  • 英文版
    Photoflash Capacitor Charger with IGBT Driver
    ALLEGRO [A...
  • 英文版
    Photoflash Capacitor Charger with IGBT Driver
    ALLEGRO
  • 英文版
    Photoflash Capacitor Charger with IGBT Driver
    ALLEGRO [A...
  • 英文版
    Photoflash Capacitor Charger with IGBT Driver and Refresh
    ALLEGRO
  • 英文版
    Photoflash Capacitor Charger with IGBT Driver and Refresh
    ALLEGRO [A...
  • 英文版
    White LED Driver Constant Current Step-up Converter
    ALLEGRO
  • 英文版
    White LED Driver Constant Current Step-up Converter
    ALLEGRO [A...
  • 英文版
    Photoflash Capacitor Charger with IGBT Driver
    ALLEGRO
  • 英文版
    Photoflash Capacitor Charger with IGBT Driver
    ALLEGRO [A...
  • 英文版
    White LED Driver Constant Current Step-up Converter
    ALLEGRO
  • 英文版
    White LED Driver Constant Current Step-up Converter
    ALLEGRO [A...

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！