AT1452 Overview
The AT1452 is a charger control IC for Photoflash capacitor with soft start function, adjustable maximum duty cycle, auto-refresh and autodischarge (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.
AT1452 Key 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
- Protected by U.S. Patent #6,724,989