DESCRIPTION
The LT®3484 family of photoflash capacitor charger ICs is designed for use in digital camera and mobile phone applications where space is at a premium. The LT3484’s patented control technique allows it to use extremely small transformers, and the improved NPN power switch requires no external Schottky diode clamp, reducing solution size. Output voltage detection requires no external circuitry as the transformer turns ratio determines final charge voltage.

FEATURES
■ Highly Integrated IC in 2mm × 3mm DFN Package
   Reduces Solution Size
■ Uses Small Transformers:
   5.8mm × 5.8mm × 3mm
■ Fast Photoflash Charge Times:
   4.6s for LT3484-0 (0V to 320V, 100µF, VIN = 3.6V)
   5.7s for LT3484-2 (0V to 320V, 100µF, VIN = 3.6V)
   5.5s for LT3484-1 (0V to 320V, 50µF, VIN = 3.6V)
■ Operates from Two AA Batteries, or Any Supply from
   1.8V up to 16V
■ Controlled Average Input Current
   500mA (LT3484-0)
   350mA (LT3484-2)
   225mA (LT3484-1)
■ No Output Voltage Divider Needed
■ No External Schottky Diode Required
■ Charges Any Size Photoflash Capacitor
■ Available in 6-Lead 2mm × 3mm DFN Package

APPLICATIONS
■ Digital Camera and Cell Phone Flash Charger