AT1453 Datasheet | Aimtron Technology

Features - 2.5 to 5.5V supply voltage operating range. - Low current consumption: 1m A in operation, - 50 k Hz or 100k Hz operation frequency . - Built-in maximum duty control. - Push-pull output. - Built-in soft start circuit. - Built-in auto-discharge function. 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 Applications - Digital Still Cameras flash unit Block Diagram VCC READY Reference Output Control Block OUT SS DUTY Vref 1.1V CHARGE Enable Block 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 : http://.aimtron..tw Fax: 886-3-563-0879 Email: service@aimtron..tw 1 Preliminary Product Information Photoflash Capacitor Charger for DSC Pin Configuration Ordering Information Part number AT1453AP AT1453AP_GRE AT1453BP AT1453BP_GRE A:50k Hz B:100k Hz Package TSSOP8 TSSOP8,Green TSSOP8 TSSOP8,Green Marking AT1453AP AT1453AP, date code with one bottom line AT1453BP AT1453BP, date code with one bottom line Pin Description Pin No. Symbol I/O Description 1 2 3 4 5 6 7 8 CHARGE FB DUTY GND OUT VCC READY SS I I I O O I Charge enable input Error amplifier input Duty control input Ground Push-pull output Power supply Charge ready open drain output Soft-start setting 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel:...