厂商：Freescale
类别：16位单片机
厂商：Atmel
类别：EEPROM
厂商：
类别：PhotoMOS(MOSFET输出光电耦合器)
类别：8051单片机
类别：ATmega系列单片机
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特点Charges 220μF to 320V in 3.7 Seconds from 5V (LT3420)Charges 100μF to 320V in 3.5 Seconds from 5V (LT3420-1)Charges Any Size Photoflash CapacitorSupports Operation from Two AA Cells or Any Supply from 1.8V to 16VControlled Peak Switch Current: 1.4A (LT3420)1.0A (LT3420-1)Controlled Input Current: 840mA (LT3420)450mA (LT3420-1)Uses Standard TransformersEfficient Flyback Operation (>75% Typical)Adjustable OutputAutomatic RefreshCharge Complete IndicatorNo High Voltage Zener Diode RequiredNo Output Voltage Divider RequiredSmall 10-Lead MSOP PackageSmall 10-Lead (3mm × 3mm) DFN Package典型应用典型应用描述The LT?3420/LT3420-1 charge high voltage photoflash capacitors quickly and efficiently. Designed for use in both digital and film cameras, these devices use a flyback topology to achieve efficiencies up to four times better than competing flash modules. A unique adaptive off-time control algorithm* maintains current-limited continuous mode transformer operation throughout the entire charge cycle, eliminating the high inrush current often found in modules.The LT3420/LT3420-1 output voltage sensing scheme* monitors the flyback voltage to indirectly regulate the output voltage, eliminating an output resistor divider or discrete zener diode. This feature allows the capacitor to be held at a fully charged state without excessive power consumption. Automatic refresh (which can be defeated) allows the capacitor to remain charged while consuming an average input current of about 2mA, at a user-defined refresh rate. A logic high on the CHARGE pin initiates charging, while the DONE pin signals that the capacitor is fully charged.The LT3420/LT3420-1 are available in 10-Lead MSOP and (3mm × 3mm) DFN packages.*Protected by U.S. Patents including 6518733.