EUP3618 Datasheet | Eutech

Preliminary Charge Pump Flash LED Driver with Safety Timer DESCRIPTION The EUP3618 is a large-current charge pump designed specifically for white LEDs used in camera flash applications. Only one small bucket capacitor is required to develop the output drive, providing a low EMI solution pared with inductive boost regulators. The EUP3618 has two operation modes: Flash mode and Movie mode. In Flash mode, the EUP3618 is capable of delivering 500m A of regulated current for a duration of 500ms or up to 700m A for a reduced duration. A safety timer is also included to ensure the LED can not be on indefinitely and overheat. The EUP3618 is available in a 10-pin TDFN package. Features Input Voltage Range - 2.7V to 5.5V Flash and Movie - Two Selectable Modes Up to 700m A Output Current - Flash Mode Flash Mode Safety Timer Shut-Off 1X and 2X Automatic Mode for High Efficiency External Flash Control Pin for Synchronization to a Camera Module or Graphics Controller Short-Circuit, Over-Voltage, Over-Current and Over-Temperature Protection Soft-Start Functionality 3mm × 3mm TDFN-10 Package Ro HS pliant and 100% Lead (Pb)-Free Halogen-Free APPLICATIONS Mobile Camera Phones Digital Cameras PDAs with Built-In Cameras Typical Application Circuit Figure 1. DS3618 Ver0.1 Jul. 2012 1 http://.. Preliminary Pin Configurations Package Type Pin Configurations TDFN-10 Pin Description PIN 1 2 3 4 5 6 7 8 9 10 TDFN-10 VIN CP CN FLASH CTRL RSET FB SGND PGND VOUT Input voltage. Positive terminal of fly capacitor. Negative terminal of fly capacitor. Flash mode enable pin. Puts the device in active Flash mode when high. Control input bit. Used to enable and set the output current in Movie mode. Connect a resistor from this pin to ground. In Flash mode (FLASH=High) this resistor sets the current regulation point according to the following: VFB=(1.2V/RSET)- 12.5KΩ Current-setting reference pin. Connect to the LED cathode and the current setting...