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AT1453 データシート PDF ( 特性, スペック, ピン接続図 )

部品番号 AT1453
部品説明 Photoflash Capacitor Charger
メーカ Aimtron Technology
ロゴ Aimtron Technology ロゴ 

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AT1453 Datasheet, AT1453 PDF,ピン配置, 機能
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AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Features
• 2.5 to 5.5V supply voltage operating range.
• Low current consumption: 1mA in operation,
• 50 kHz or 100kHz operation frequency .
• Built-in maximum duty control.
• Push-pull output.
• Built-in soft start circuit.
• Built-in auto-discharge function.
Applications
•Digital Still Cameras flash unit
General Description
The AT1453 is a charger control IC for Photoflash
capacitor with soft start function, adjustable
maximum duty cycle and auto-discharge (soft start
capacitor) circuit. Adjustable soft start is
programmed with an external capacitor on SS pin.
The control technique allows for the use of
external resistor to change the switching duty and
use of transformer to control the input current. A
logic high on the CHARGE pin initiates charging,
while the READY pin signals that the capacitor is
fully charged. It is ideal for DSC flash unit.
* Protected by U.S. Patent #6,724,989
Block Diagram
VCC
READY
GND
CHARGE
Reference
Vref
1.1V
Output
Control
Block
Enable
Block
OUT
SS
DUTY
FB
Aimtron reserves the right without notice to change this circuitry and specifications.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
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