LT3484-0

www.DataSheet4U.com LT3484-0/LT3484-1/LT3484-2 Photoflash Capacitor Chargers FEATURES ■ ■ ■ DESCRIPTIO ■ ■ ■ ■ ■ ■ 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 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. The devices feature a VBAT pin, which allows the use of 2 alkaline cells to charge the capacitor. The LT3484-0, -2 and -1 have primary current limits of 1.4A, 1A and 0.7A respectively, resulting in tightly controlled average input current of 500mA, 350mA and 225mA respectively. The three versions are otherwise identical. The C...