ZXSC440 Datasheet | Zetex Semiconductors

PHOTOFLASH CHARGER DESCRIPTION The ZXSC440 is a dedicated photoflash charger, charging an 80␮F photoflash capacitor to 300V in 3.5 seconds from a 3V supply. The flyback conversion efficiency is typically 75%, much higher than the monly used discrete charging circuits. The Charge pin enables the circuit to be initiated from the camera's microprocessor, using negligible current when flash is not being used. The Ready pin signals the microprocessor when the flash is charged and ready to be fired. A small amount of hysteresis on the voltage feedback shuts down the device as long as the capacitor remains fully charged, again using negligible current. Features - Charges a 80␮F photoflash capacitor to 300V in 3.5 seconds from 3V APPLICATIONS - Digital camera flash unit - Film camera flash unit - Charges various value photoflash capacitors - Over 75% flyback efficiency - Charge and Ready pins - Consumes only 4.5␮A when not charging - Small MSOP8 low profile package TYPICAL APPLICATION CIRCUIT PINOUT MSOP8 pin TOP VIEW ORDERING INFORMATION DEVICE ZXSC440X8TA ZXSC440X8TC DEVICE DESCRIPTION TEMPERATURE RANGE PART MARK ZXSC440 TAPING OPTIONS TA, TC Camera flash charger -40°C to +85°C - TA reels hold 1000 devices - TC reels hold 4000 devices DRAFT ISSUE F - MAY 2004 1 SEMICONDUCTORS...