PT4305 Datasheet | PowTech

DESCRIPTION FEATURES PT4305 is a 1x/1.5x auto-adjust charge pump white z 1x/1.5x auto-adjust charge pump LED driver with maximum 350m A load. Auto-adjust z 350m A maximum load current charge pump achieves high efficiency for Li-Ion battery z <10% feedback voltage reference error Micro Bridge Technology Co.,Ltd. supply. Few external ponents (two flying capacitors, two filter capacitors at VIN and VOUT, and one feedback resistor) make PT4305 ideally suited for mobility application. The current through the LED can be pre-set by feedback resistor. And the LED can also be dimmed by PWM control signal. Built-in soft-start circuit prevents the inrush current from supply source during power on and 1x/1.5x mode change. Thermal shutdown and current limiter prevent PT4305 being damaged by the high-level current through it. Shutdown current less than 1u A makes the battery time longer. PT4305 is packaged with QFN-10, MSOP-10 and SOP-14, and it is also available with different feedback voltage references: 315m V, 236m V, 157m V, and 78m V. z Dimming LED by PWM signal through EN/PWM pin z Less than 1u A shutdown current z Built-in soft-start and soft mode decision z Less than 1u A shutdown current r z Thermal shutdown n z Shorted LED protection APPLICATIONS z Cell Phones z Camera Flash Driver z Small LCD Displays z 1 Watt White LED Driver z Handheld puters and PDAs ORDERING INFORMATION PACKAGE TEMPERTURE RANGE DFN-10 -40 o C to 85 o C MSOP-10 -40°C to 85°C SOP-14 -40 o C to 85 o C FEEDBACK VOLTAGE 315m V 236m V 157m V 78m V 315m V 236m V 157m V 78m V 315m V 236m V ORDERING PART NUMBER PT4305EQFN-315 PT4305EQFN-236 PT4305EQFN-157 PT4305EQFN-78 PT4305EMSI-315 PT4305EMSI-236 PT4305EMSI-157 PT4305EMSI-78 PT4305ESON-315 PT4305ESON-236 TRANSPORT MEDIA MARKING Tape and Reel 3000 units PT4305 xxxxx X Tape and Reel 3000 units PT4305 xxxxx X Tube 157m V PT4305ESON-157 50 units xxxxx X 78m V PT4305ESON-78 Note: xxxxx X Assembly Factory Code Lot Number PT4305_DS Rev...