● Ultra Compact Solution

   Small, WLCSP-2×1.6-12B Package

   Smallest Footprint, 1mm-Height, 1μH Power Inductor

● LED Current Source for Local LED Grounding

   Simplified Routing to and from LEDs

   Improved LED Thermal Dissipation

● Synchronous 3MHz PWM Boost Converter, No External Diode

● High Efficiency: 95% Peak

● I2C Programmable

   Currents up to 1.1A in Flash Mode per LED

   When VIN is not Lower than 3.6V (The Total 2 LEDs 

   Current is 1.5A When VIN is Lower than 3.6V)

   Torch Mode

   Programmable DC Battery Current Limit

   Programmable Flash Timer up to 1600ms

   Low Battery Mode to Reduce LED Current Automatically

● Device Control

   I2C-Compatible Control Registers

   External STROBE and Torch Input Pins

   Transmitter Mask (TxMASK) Input

● Safety Features

   Thermal Overload Protection

   Inductor Fault Detection

   LED Short-Circuit/Open-Circuit Protection

The SGM3784 is a very compact, highly efficient, dual white LED flash driver for high resolution camera phones that improves picture and video quality in low light environments. The device integrates a programmable 1.6MHz or 3MHz synchronous inductive boost converter, an I2C-compatible interface, and two 1.1A current sources. The high switching frequency enables the use of a tiny, 1mm high, low cost, 1μH power inductor, and the parallel current sources permit LED cathode grounding for thermally enhanced, low EMI and compact layouts.

The LED driver maximizes efficiency over the entire battery voltage range to maximize the input-power-to- LED-power conversion and minimize battery current draw during flash events. A programmable DC battery current limit safely maximizes LED current for all LED forward voltage and battery voltage conditions. A Transmitter Mask (TxMASK) input enables fast reduction of the flash LED currents and battery current during a power amplifier current burst. The

I2C-compatible interface can be used to program timers and currents and to read back status bits for operation monitoring and safety control.