G2109 Global Mixed-mode Technology Photoflash Capacitor Charger for DSC Feature Description 2.9V to 5.5V Supply Voltage Operating Range. Adjustable Output Voltage. Adjustable Peak Current. Charge Complete Indicator. Built-in IGBT Driver. Built-in Slow Charge Function. Thermal Protection Built-in Output Short Circuit Protection Charges Any Size Photoflash Capacitor. Small 10-lead DFN Package. Application The G2109 is a charger IC for Photoflash capacitor with soft-start function, an IGBT driver for igniting flash tube, adjustable output voltage and adjustable primary peak current to perform energy transition on each charge cycle. The output voltage is determined by voltage divider connecting to the anode of the rectifying diode. The voltage sensing path is cut off when charging function to be completed to maintain minimum output voltage decay. It also provides SCP function for the voltage divider open or output short. Digital / Film Camera Flash PDA / Cell Phone Flash. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G2109K21U 2109 -40°C to +85°C TDFN2X2-10 Note: K2: TDFN2X2-10 1: Bonding Code U: Tape & Reel Pin Configuration G2109 SC 1 DRIVER 2 10 Exposed Pad LX 9 VREF 8 ADJ VCC 3 TRIGGER 4 7 FB CHARGE 5 6 READY TDFN2X2-10 Note: Exposed Pad must connect to GND. Ver: 0.7 Feb 29, 2012 TEL: 886-3-5788833 http://www.gmt.com.tw 1