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AT1452のメーカーはAimtron Technologyです、この部品の機能は「Photoflash Capacitor Charger」です。 |
部品番号 | AT1452 |
| |
部品説明 | Photoflash Capacitor Charger | ||
メーカ | Aimtron Technology | ||
ロゴ | |||
このページの下部にプレビューとAT1452ダウンロード(pdfファイル)リンクがあります。 Total 17 pages
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AT1452
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.
• Built-in auto-refresh function.
Applications
•Digital Still Cameras flash unit
Block Diagram
General Description
The AT1452 is a charger control IC for Photoflash
capacitor with soft start function, adjustable
maximum duty cycle, auto-refresh 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.
Automatic refresh allows the capacitor to remain
charged while output voltage dropped 10%. 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
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: [email protected]
1
1 Page AT1452
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Absolute Maximum Ratings
Parameter
Condition
Rated Value
Unit
Min. Max.
Power Supply Voltage
Source Average Current of OUT
Sink Average Current of OUT
Input Voltage to Error Amplifier
Continuous power dissipation
Operating temperature
Junction temperature
Storage temperature
Lead temperature
—
—
—
—
TSSOP8(Ta=+25℃)
SOP8(Ta=+25℃)
—
—
—
—
- +6.5
- -50
- 50
- 6.5
- 450
- 500
-30 +85
- +125
-40 +150
- +300
V
mA
mA
V
mW
mW
0C
0C
0C
0C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
Power supply voltage
Operating temperature
VCC
TOP
Min.
2.5
-30
Values
Typ. Max.
-- 5.5
+25 +85
(Ta=+250C)
Unit
V
°C
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: [email protected]
3
3Pages AT1452
Preliminary Product Information
Photoflash Capacitor Charger for DSC
DUTY Setting
The DUTY resistor selection depends on Duty Cycle , choose the component using the following
equation:
V DUTY
(V )
=
0.3
+
DUTY
1.15
RDUTY
(KΩ)
=
15
( 1.1
VDUTY
)
− 1.073
Example:
Set duty cycle is 50%
VDUTY
=
0.3
+
0.5
1.15
= 0.734
RDUTY
=
15
(
1.1
0.734
)
−
1.073
≈ 35.2KΩ
Output Voltage Setting
VOUT
=
R1 + R2
R2
×
VFB
VFB = 1.1V
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: [email protected]
6
6 Page | |||
ページ | 合計 : 17 ページ | ||
|
PDF ダウンロード | [ AT1452 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
AT1450 | Photoflash Capacitor Charger | Aimtron Technology |
AT1452 | Photoflash Capacitor Charger | Aimtron Technology |
AT1453 | Photoflash Capacitor Charger | Aimtron Technology |
AT1454 | Photoflash Capacitor Charger | Aimtron Technology |