ZXSC440

SEMICO NDUC TORS

ISSUE 1 - JANUARY 2005

3

BLOCK DIAGRAM

PIN #

NAME

DESCRIPTION

1

DRIVE

Drive output for external switching transistor. Connect to base or gate of external

switching transistor

Reference voltage. Internal threshold set to 300mV. Connect external resistor

network to set output voltage

3

SENSE

Inductor current sense input. Internal threshold voltage set to 28mV. Connect

external sense resistor

4

N/C

5

CHARGE

Initiate photoflash capacitor charging

6

READY

Signal to microprocessor when photoflash capacitor charged

7

GND

Ground

Supply voltage, 1.8V to 8V

ABSOLUTE MAXIMUM RATINGS