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PDF AT1454 Data sheet ( Hoja de datos )
| Número de pieza | AT1454 | |
| Descripción | Photoflash Capacitor Charger | |
| Fabricantes | Aimtron Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AT1454 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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AT1454/AT1454A/AT1454B
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Feature
• 2.5V to 5.5V Supply Voltage Operating
Range.
• Low Current Consumption:1mA in operation.
• Adjustable Output Voltage.
• Adjustable Switch On-Time.
• Charge Complete Indicator.
• Built-in IGBT Driver.
• Soft-Start Circuitry.
• Thermal Protection
• Charges Any Size Photoflash Capacitor.
• AT1454 with Auto-Refresh Function.
• AT1454A/B without Auto-Refresh Function.
• Small 10-lead MSOP Package.
Application
• Digital / Film Camera Flash
• PDA / Cell Phone Flash.
Description
The AT1454 series is a charger IC for Photoflash
capacitor with soft-start function, an IGBT driver
for igniting flash tube, adjustable output voltage
and adjustable switch on-time to perform energy
transition on each charge cycle. The output voltage
can be adjusted by simply changing the turn ratio
of transformer. AT1454B is sensed by voltage
divider connecting to the anode of the rectifying
diode. The voltage sensing path is cut off when
charging function to be completed to maintain
minimum output voltage decay.
The device allows user to control automatic refresh
rate on Charge pin. While the Ready pin signals
that the capacitor is fully charged.
AT1454/AT1454A/AT1454B is available in
MSOP-10 package.
Block Diagram
Aimtron reserves the right without notice to change this circuitry and specifications.
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
3/24/2006 REV:1.2
Email: [email protected]
1
1 page  
Timing Chart
Vcc
Trige
READY
AT1454/AT1454A/AT1454B
Preliminary Product Information
Photoflash Capacitor Charger for DSC
VOUT
CHARGE
Charge On
Timing
Shutdown
Charging
Auto charge to Refresh
AT1454 Auto-Refresh Mode
Storbe
Power OFF
Timing
Vcc
Trige
READY
VOUT
CHARGE
Charge On
Timing
Shutdown
Charging
Toggling CHARGE to Refresh
Storbe
1.uP Detected READY pin Low ->High(Charge Complete)
-->allow enter refresh mode or strobe tube
2.Use uP to delay Photoflash Capacitor self-discharge time Ts
3.Toggling CHARGE pin high->low->high, force the IC into refresh
charging mode.
AT1454A/B Charge Toggle-Refresh (Soft-ware control)Mode
Power OFF
Timing
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
3/24/2006 REV:1.2
Email: [email protected]
5
5 Page 
AT1454/AT1454A/AT1454B
Preliminary Product Information
Photoflash Capacitor Charger for DSC
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
3/24/2006 REV:1.2
Email: [email protected]
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet AT1454.PDF ] | |
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