LD7270

LD7270 6/18/2010 Smart Photoflash Capacitor Charger with Integrated MOS REV：03 General Description The LD7270 is an ideal charge control IC for flash units, featuring internal soft start, adjustable charging current and output voltage. It provides a charging algorithm to speed up the charging with higher efficiency. The LD7270 can operate in desired constant peak current mode through adjusting RI between ISET pin and GND. As well, LD7270 uses separate source and sink pin of IGBT driver, which enables the users to easily meet different IGBT application requirements. The LD7270 is available in a space-saving WDFN-10L 3x3 package and is ideal for DSC flash unit. g Patented Features 1.8V~6V Battery Voltage Range Adjustable Output Voltage Adjustable Input Current Integrated 47V Power MOS Separate Source and Sink Pin of IGBT Driver False Triggering Prevention Soft Start Output Voltage Overcharge Protection High Efficiency Applications DSC Flash Unit Cell Phone with Camera Typical Application RI = 40000 IPK -PRI (Ω) Fig.1 Leadtrend Technology Corporation LD7270-DS-03, June 2010 1 www.leadtrend.com.tw LD7270 Fig. 2 Fig. 3 Leadtrend Technology Corporation LD7270-DS-03, June 2010 2 www.leadtrend.com.tw LD7270 Fig. 4 Two level charging current. Leadtrend Technology Corporation LD7270-DS-03, June 2010 3 www.leadtrend.com.tw Pin Configuration WDFN-10 (3mm x 3mm) I S ET CHARGE VBAT VCC LX 10 9 8 7 6 7 270DH YYWWPPT 1 23 4 5 YY: Year code WW: We...