ZXSC440
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 commonly 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
ZETEX [ ZETEX SEMICONDUCTORS ]
