Linear Technology LT3420-1
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. The LT3420/LT3420-1 are available in 10-Lead MSOP and (3mm × 3mm) DFN packages.| Part No. | LT3420-1 |
|---|---|
| Datasheet | LT3420-1 Download |
| Manufacturer |  Linear Technology |
| Description | Photoflash Capacitor Chargers |
| Buy | Stock & Price |
FEATURES
DESCRIPTIO● 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 Capacitor
● Supports Operation from Two AA Cells or Any Supply from 1.8V to 16V
● Controlled Peak Switch Current: 1.4A (LT3420) 1.0A (LT3420-1)
● Controlled Input Current: 840mA (LT3420) 450mA (LT3420-1)
● Uses Standard Transformers
● Efficient Flyback Operation (>75% Typical)
● Adjustable Output
● Automatic Refresh
● Charge Complete Indicator
● No High Voltage Zener Diode Required
● No Output Voltage Divider Required
● Small 10-Lead MSOP Package
● Small 10-Lead (3mm × 3mm) DFN Package U APPLICATIO S
● Digital Camera Flash Unit
● Film Camera Flash Unit
● High Voltage Power Supplies 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.
