特点
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, V
IN
= 3.6V)
??? 5.7s for LT3484-2 (0V to 320V, 100μF, V
IN
= 3.6V)
??? 5.5s for LT3484-1 (0V to 320V, 50μF, V
IN
= 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
典型应用
典型应用
描述
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 CHARGE pin gives full control of the part to the user. Driving CHARGE low puts the part in shutdown. The DONE pin indicates when the part has completed charging. The LT3484 series of parts are housed in a tiny low profile 2mm × 3mm DFN package.